How to troubleshoot mold on interior walls

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When drywall gets wet, it stains, swells, buckles and disintegrates. Paneling is a little better, but mold and mildew can grow on either wall sheathing given damp conditions. Wet insulation in most forms will fail, with the possible exception of rigid foam insulation, which is impervious to moisture penetration structurally but will support mold growth inside the wall. Many interior walls do not contain insulation, but some may. Then there are the wood studs and the framing inside your walls. Water on wood invites pests, mold and decay. Eventually, a rain-soaked interior wall may lead to health problems and structural damage if left unfixed.

Cut the wall covering away wherever it is rain-soaked. Even after it dries, moisture-damaged drywall will have dark, blotchy areas with obvious edge lines showing where the damage ends. Use a utility knife or similar tool to punch into the damaged area, between two studs, and cut backward to where the damage ends. Continue cutting around the perimeter, avoiding wires and pipes. Severely water-damaged paneling will pull away from the studs with a little prying.

Pull out fiberglass insulation if it appears compressed or discolored; good insulation will be fluffy pink, like cotton candy. Scoop out cellulose insulation under the same conditions. Remove rigid foam insulation if you see patches of black mildew or mold growth, or if you suspect that water may have leaked behind the insulation and contacted the studs and horizontal wall plates at the floor or ceiling. Light rain damage may not make it inside the wall cavity, and many interior walls do not even contain insulation.

Turn on a flashlight or a trouble light and inspect the wood inside the wall. Look for mold and mildew growth or evidence of rot. If the rain damage was extreme and left to sit for a fairly long period of time, the wood inside the wall will grow soft and decay. This is fairly uncommon but signals the need for more extensive repair, in the form of cutting new studs and plates and sistering them in beside or even in place of the originals. Consult a carpenter to determine the appropriate action if your wood needs attention.

Wash away mold and mildew from otherwise structurally sound wall framing. Mix your choice of solutions: either one part household bleach to 10 parts water or one part borax to a gallon of water. Fill a spray bottle with the solution. Squirt a fine mist over the entire moldy area and a little beyond. Do not drench the wood, but don’t hesitate to spray either. Scrub the entire area with a brush, dipping it frequently into a bucket of the same solution. Wipe up the excess liquid along with any chunks or pieces of debris that loosen. Leave the remaining liquid without rinsing, as the dried residue will continue to kill mold for a period of time.

Turn on a fan and aim it at the exposed portion of the wall. Allow the cavity to air-dry thoroughly; a day or two is frequently necessary.

Trim the drywall edges around the perimeter to end in the middle of the stud closest to the edge. Use a carpenter’s square to mark and cut the opening into a rectangle or square shape.

Cut a piece of drywall to fit the removed section. Measure and mark the size required. Use a straightedge to guide your cut. Score the surface of the drywall, cutting through the paper. Snap the drywall away from the cut to break the piece, then insert the knife from the opposite side and cut through the paper holding the pieces together.

Replace the insulation in the wall, if desired. Use fiberglass batts cut to fit between the studs, or sheets of rigid foam insulation that push into the stud cavities. Skip if you do not want insulation. However, insulation does help prevent sound transmission and isolates the room’s temperature.

Hold the drywall up to the opening. Drive screws through the drywall into the studs every 8 to 10 inches. Sink the screw heads slightly belNail paneling similarly.

Use a trowel or drywall knife to force joint compound into the seams between drywall sheets and over each screw head. Tape over every joint, working the air out by sliding the tool along the length, and smooth another thin layer of compound over the tape. Repeat with the screws. Air-dry and sand smooth. Repeat several times, feathering out the edges farther with each layer, until the surface is smooth and blemish-free, with no visible sign of the seam or screw. The wall is now ready for painting.

Safely remove unsightly and potentially hazardous mold from the bathroom and other moisture-prone zones—and keep it at bay—with these easy methods.

How to Troubleshoot Mold on Interior Walls How to Troubleshoot Mold on Interior Walls How to Troubleshoot Mold on Interior Walls How to Troubleshoot Mold on Interior Walls

How to Troubleshoot Mold on Interior Walls

Q: Ugh! I’ve recently discovered ugly patches of mold on the walls in my bathroom. Is it dangerous? How do I get rid of it?

A: It’s an all-too-common problem in any area of the home where moisture levels tend to be high: splotches of mold growing on the walls or ceiling. While mold can sprout anywhere along a wall, it’s most often found either up high near the ceiling, down low near the floor, or creeping along edges of trim or baseboards. This frustrating and potentially hazardous problem is most common in bathrooms with frequently used showers or tubs, but can also affect damp basements, kitchens, or laundry rooms. If conditions are damp, ventilation is poor, and temperatures are high, airborne, invisible mold spores—found virtually everywhere—happily settle in and grow.

The most feared type of mold is Stachybotrys chartarum, typically referred to as black mold, which can cause chronic respiratory irritation, headaches, and persistent fatigue. According to the Centers for Disease Control and Prevention, black mold requires constant moisture for growth—not just intermittent moisture from the shower—so it’s likelier that your problem is caused by another less toxic variety of mold. That said, a severe mold situation can lead to or exacerbate respiratory or immune system issues.

If mold is growing in an area that remains wet, it’s best to consult with an expert in mold remediation for professional cleaning services. The good news is that you should be able to clear up most everyday mold problems yourself. Keep reading to learn techniques for curing the common mold.

How to Troubleshoot Mold on Interior Walls

Remove mold stains from walls.

Mix a solution of one part bleach to three parts water in a spray bottle, and thoroughly saturate the moldy areas of the wall. Open a window and/or keep a fan running as you work; bleach fumes are unpleasant and can be irritating to the lungs. Let the bleach soak into the mold on the walls for several minutes, then use a scrub brush to remove the stains. If the stains are extensive or deep, you may need to repeat the process to remove all discoloration.

Kill mold on walls.

While bleach works well to kill surface fungus and remove the ugly marks on the walls caused by mold, it doesn’t penetrate deeply into the drywall and so it leaves the mold’s “roots” undisturbed. That means the problem is likely to reoccur, sometimes within days. To kill mold beneath the surface, simply spray undiluted white vinegar onto the affected area and let it dry. Don’t worry about the odor; the smell will dissipate once the vinegar is completely dry.

How to Troubleshoot Mold on Interior Walls

Prevent future mold growth.

Once you’ve removed all mold on the walls, keep those surfaces looking good with a few preventative measures:

  • Wipe up puddles or spills immediately.
  • After a shower or bath, leave the bathroom door open with the ventilation fan running—or the bathroom window open—for at least 20 minutes to allow humidity to diminish.
  • Keep an eye out for plumbing leaks. Fix them right away—most types of mold only need around 24 to 48 hours of moisture before spores start to multiply, and black mold becomes more of a possibility the longer water leaks are left untended.
  • Spread out damp towels so they dry quickly.
  • If possible, shower with the bathroom door open so condensation doesn’t build up in the enclosed space.
  • Set a canister of moisture-absorbing desiccant—these generally contain either silica gel or salt—in a corner of your bathroom, or run a dehumidifier if you live in a particularly humid climate.
  • Squeegee shower walls and glass doors after every use to help remove the moisture that encourages the growth of mold on your walls and also prevent unsightly hard-water and soap-scum buildup.
  • Use mold-resistant paint in the bathroom or mold-prone areas when it’s time to repaint or remodel.
  • Clean the bathroom weekly with your favorite disinfecting product, whether that be bleach, vinegar, or a commercial cleaner, and remember to scrub underneath bottles of shampoo and other shower necessities where mold spores tend to linger.

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How to Troubleshoot Mold on Interior Walls: 13 Steps How to Troubleshoot Mold on Interior Walls. Given the right circumstances, mold takes hold of a home and spreads throughout the interior. . choose a latex-based paint that will allow the air to flow through your interior walls and reduce future mold growth. . Include your email address to get a message when this question is answered. Submit.

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How to Remove Mold from Walls for Good | Step-by-Step Guide How to Stop Mold from Growing on Walls. To get rid of mold on walls permanently, remove it using the steps above. Then, adopt the following practices to keep it from returning. In Basements. Open curtains daily. Sunlight is a natural mold killer. If your basement has windows and doors, open them a few minutes each day to allow air to circulate.

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How to Deal with Mold In Walls: The Definitive Guide . We often hear this question from concerned residents who contact us about mold inspection in their Chicago homes. It’s important to understand mold basics before you decide on how to handle unhealthy growth that you can’t see. Follow Your Senses. If you can smell it, it’s there behind the walls.

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Mold in Walls . Finding Mold Inside Walls, Removal . mold in walls. Mold in walls is a particularly tricky problem. It can grow there for quite some time before you even realize it’s there, spreading unseen inside the walls. The mold in your walls may not stay in the walls, either. It can spread throughout your home. And even if you’re not aware of its presence, mold inside walls can cause health .

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What Causes Mold on Walls? – HomeSelfe Mold doesn’t grow out of nowhere. When you start seeing signs of mold on your walls, it’s time to reassess the potential causes. Most people understand that mold thrives where excessive moisture is present, but fewer realize how many opportunities there are for moisture to accumulate in a house.

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How To Remove Mold & Mildew From Walls (The Right Way . Cleaning Mold From A Painted Wall With No Water Damage The first step in cleaning moldy walls or ceiling areas is to take the appropriate safety precautions. While mold may not affect everyone, some individuals can have adverse allergic reactions to even small amounts of mold exposure.

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Mold on the Walls? How to Kill It and Clean Up . – Bob Vila Remove mold stains from walls. Mix a solution of one part bleach to three parts water in a spray bottle, and thoroughly saturate the moldy areas of the wall. Open a window and/or keep a fan .

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Dealing With Mold In Walls . Causes, Finding, Removal When dealing with wall mold, you have to check for mold in walls, too. It’s very common, when you have mold on your walls, to also find mold inside the walls. If you don’t remove the mold inside walls as well, there’s no point removing the mold on the outside of the walls, since the mold inside the walls will just continue to grow and spread.

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7 Quick Ways to Remove Mold from Basement Walls To kill mold on concrete basement walls or for an ideal DIY mildew remover, pour 3% hydrogen peroxide into a spray bottle.Saturate the walls with the peroxide, then let it sit for up to 30 minutes. Clean mold off walls by scrubbing the area thoroughly with a bristle brush after about ten minutes to help to lift any residual mold out of the pores in the concrete.

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When dealing with wall mold, you have to check for mold in walls, too. It’s very common, when you have mold on your walls, to also find mold inside the walls. If you don’t remove the mold inside walls as well, there’s no point removing the mold on the outside of the walls, since the mold inside the walls will just continue to grow and spread.

How Do You Know if You Have Mold Inside Walls?

You should suspect mold in your walls if:

  • There is a significant amount of wall mold on the outside of your walls.
  • There has been flooding or other significant water damage in the home.
  • You smell a definite musty odor in the room but can’t see any mold (in this case, check air ducts for mold, as well).

The only way to know for sure if there is mold in walls is to look. Cut 12 inch by 12 inch inspection holes with a drywall saw every four feet, remove any insulation, and use a mirror and flashlight to inspect the inside of the walls.

You can also call in a certified mold tester to inspect your home and test different areas for the presence of mold. Certified mold testers are usually engineers and they know how and where to look for mold. They will make sure you don’t overlook any hidden mold in the home. To find certified mold testers in your area, follow the link.

Dealing with Mold in Walls

How to Troubleshoot Mold on Interior Walls

Before beginning the job of removing mold from the inside of walls, you need to cover doorways, air vents, and other openings to other parts of the home with plastic. If you’re working in a large room, you can use large sheets of plastic to block off a smaller area in which you will be working. This prevents the spread of mold spores to other areas of the home. Mold remediation experts often recommend setting up negative pressure in the work area, as well.

Remove moldy drywall and insulation. Use a spray bottle of water to dampen moldy materials before removing them; this helps prevent mold spores from becoming airborne during the process. When sawing through moldy drywall, you can have an assistant hold a vacuum hose with a HEPA filter nearby to further decrease the spread of mold spores. Enclose moldy materials in heavy plastic garbage bags before carrying it out of the home so no mold spores are spread to other areas of the home in the process. It’s imperative that you do everything possible to prevent spreading mold spores throughout the house so that you don’t end up with mold in other rooms.

If there is any mold on the wooden studs in the wall, clean those as well as you can with an antimicrobial cleanser. Allow them to dry completely, then apply a mold sealant to make sure any remaining traces of mold cannot continue to grow and spread. Do not attempt to sand wooden studs to remove mold; sanding moldy wood should only be done by a professional, since it greatly increases exposure to potentially harmful mold spores and can lead to serious illness.

If you want help removing wall mold, or if you think the wooden studs might need to be sanded, we recommend scheduling a consultation with a mold removal professional. Even if you plan to do the work yourself, you can get some free professional advice, because most mold removal professionals offer free in-home consultations. To find experienced mold removal professionals offering free in-home consultations in your area, just follow the link.

Related Articles

Mold and mildew – a form of mold in its early stages – grow easily in damp, warm and humid or water-damaged areas. Not only are mold and mildew unsightly, but certain strains can cause allergies and serious respiratory conditions along with the damage they can cause to your walls. Safely clean and disinfect painted walls with common household supplies such as detergent and bleach.

Check for mold and mildew damage underlying the drywall before you begin. If the drywall crumbles to the touch or has large cracks in it, consult with a professional on how to proceed, otherwise skip to Step 2.

Prepare for cleaning and disinfecting by removing furniture or decorative items from the affected area. Wear protective rubber gloves, goggles and a mask to protect yourself. Lay plastic sheets down on the floor, over windows and vents and secure with tape.

Mix 3 parts warm water to 1 part detergent in a spray bottle. Spray the solution on the affected area. Scrub mold off with a rag or towel. Fill the second spray bottle with clean water and spray to rinse the area. Wipe dry with a rag or towel.

Make a solution of 1 part bleach to 2 parts water in the third spray bottle. Spray the mixture onto the affected area. Leave for 10 minutes, then rinse with the spray bottle filled with water. Dry with a clean towel, cloth or rag.

Discard used towels and plastic in a tightly tied garbage bag and dispose of with normal garbage. Flush any water or liquids used in the process in the toilet.

Mildew and black mould on walls is not only unsightly — it can also be harmful to your health. Fortunately there are ways to stop mould on walls and keep your home healthy. Read on for handy hints on how to clean mould — and keep it from coming back!

Updated 8 September 2020


Mould and mildew are the bane of most households, but luckily, it’s possible to use everyday cleaning products to banish and prevent mould from creeping back in again. Mildew, whether on walls or other surfaces, like floors or carpets, is not great news for your health, so it’s also really important to tackle the root cause. Read on for a quick, 3-step guide on how to get rid of mould on walls in your home.

What are mould and mildew and why do they occur on walls?

Mould is a kind of fungus that develops from airborne spores. It usually grows in damp, warm conditions without much airflow, which is why household bathrooms and loft spaces often suffer from mould. It is often simply caused by humid conditions and lack of ventilation, but sometimes mould on walls can be due to plumbing leaks, both inside and outside the property. Badly insulated heating pipes can also cause a build-up of moisture behind the walls.

Mildew is the name for the most common type of black mould on walls, characterised by spots that can then spread over larger areas if left untreated. To find out if you have mildew on your walls, apply some bleach onto the affected area with a cloth. If the dark colour fades after a few minutes, it’s mildew. If not, the patch is probably just dirt.

Why do I have mould on the walls in my bedroom?

Having mould on the walls in your bedroom can be a real problem. Bedroom mould is usually caused through condensation or high humidity, normally from weather conditions. It can be caused by poor ventilation and moisture in the air. Be sure to check cracks in windows or drainpipes which could be causing a build-up of moisture.

Always follow the instructions carefully when using specially formulated mould and mildew cleaners. Take care to protect yourself by wearing eye protection, gloves, and a face mask, if necessary, and test the product in a small area before continuing.

You will need :

  • Stiff-bristled brush
  • Cloth
  • Chlorine bleach
  • Water


How to clean mould off walls in three steps

Time to learn how to clean mildew and mould off walls! A word of caution: mould can cause allergic reactions and poor health, so if you have an extensive problem with mould on walls, it may be best to seek expert help. If tackling a smaller area, make sure you wear protective eyewear, gloves, and a face-mask, as contact with the spores can be harmful. Open windows or use a fan in the room while working.

Make a solution of chlorine bleach and water

usually one part bleach to three parts water – or get hold of a household detergent like Domestos bleach spray with bleach as an active ingredient.

Scrub the blackened area

Using a stiff-bristled brush, scrub the blackened area

Rinse thoroughly and dry

Rinse with a cloth and water and leave to dry.

If this doesn’t work, there are products specifically formulated for mould and mildew on walls that may be stronger, but remember never to mix cleaning solutions together as this can cause dangerous chemical reactions. You can find out more about how to use mould and mildew removers here.

How do you know that the surfaces in your kitchen and bathroom have been disinfected?

How does a dehumidifier work?

What do dehumidifiers do to reduce humidity at home? The process is fairly simple:

The dehumidifier’s fan mechanism pulls in air from your home

This air is cooled inside the dehumidifier, and the moisture condenses into water

The water is separated off into a different section, and the drier air is lightly re-heated

This air is then released back into the room with much less moisture

The unit will switch off when the room reaches the desired humidity level, or when the water container is full

How to use a dehumidifier:

Different dehumidifiers have different capacities, so factor in the size and humidity of your room before you choose one.

Set up the dehumidifier in the dampest area of the house, like the bathroom or the basement

Consult your chosen dehumidifier’s manual for specific instructions

Set the dehumidifier with your ideal humidity level: this should be between 40% and 60%.

Be aware that the first few cycles that your dehumidifier goes through will be removing more humidity than later cycles: at first, it will be removing excess water that has built up over a certain period of humidity, whereas once it is running regularly it will be collecting lighter amounts of water to maintain an ideal humidity level

How to remove and prevent condensation mould

Spotted some nasty organic ‘wall art’ around your windows or in your bathroom? It may well be condensation mould. This type of mould appears when moist air clashes with a surface with a lower temperature, leaving nowhere for the moisture to go. Maybe you’ve seen little droplets of water form by the window or in cold corners? These moist conditions make for an ideal breeding ground for mould, so you’ll want to get rid of the condensation and dry out the air as soon as possible.

To remove condensation mould:

First of all, wear a protective face mask, goggles, and gloves while doing this.

Try a bleach-based spray (always try the product on a small part of the surface first before treating the whole of the affected area). You can also try a homemade spray made from one part white vinegar and one part water. Spray the product on the wall and let it work overnight.

Wash off the mould and the product with a damp cloth (you may need some elbow grease here) and use a dry cloth to remove the moisture.

To prevent condensation mould from returning:

Increase the ventilation in your home by opening a window. Take a look at your air vents to see if they’re blocked.

When you’re not letting fresh air in, turn up the thermostat a little.

Dry laundry outside as much as you can. If this isn’t possible, consider investing in a dehumidifier.

How to prevent mould and mildew on walls: our top 6 tips

Once you’ve dealt with a mildew infestation on your walls, the next step is to try to stop it recurring. Here are your options:

Buy a specialised product. An anti-microbial spray, for example, can help prevent the spores from settling again. Anti-mildew paint can also be purchased from most DIY stores.

Consider installing an electric de-humidifier in badly affected areas. This is ideal for long-term mould prevention.

Look into upgrading your home insulation. Sometimes, but not always, bad insulation is the root of the problem. Walls and ceilings that are properly insulated will be less affected by condensation and therefore mould.

The best tips on how to get rid of mould involve cutting out the damp conditions it loves so much:

Keep bathrooms, kitchens, and other humid spaces well-ventilated and as dry as possible

Spread out shower curtains and towels to dry.

Tackle leaks as soon as they’re discovered to prevent moisture seeping into cavities and under floors.

Don’t panic if the mould and mildew on walls return: this is a common occurrence, and you’re now a bit of an expert on how to treat mould on walls!

How to Troubleshoot Mold on Interior Walls

Several construction companies opt for brick walls in buildings in different parts of the world without taking the chances of bacterial and fungal growth on the brick surface in consideration. More than that, it is simply the lack of awareness when it comes to the impact of mold on any surface. It is important to know that brick surfaces are also prone to mold. Also, remember that mold on a brick wall is equally harmful as it is on any other surface in any area. Even then many people fail to take proper care of the issue which ends up causing more damage than anyone can ever imagine.

If you still believe we are somehow exaggerating the matter then let us share what actually this deadly fungus can get you in. You cannot afford to miss out on this information. Apart from the causes and effects of mold, you will get to know how to remove mold from brick walls.

What Causes Mold on Brick Wall?

The reality is there must be countless mold spores flying around in the room you are sitting right now given the climate and pollution situation all over the world. However, mold spores do not just keep on hovering around like a bee. They eventually settle on brick walls and eventually, a mold colony starts occupying its desired area. Moreover, the existence of mold on the brick wall has other major reasons as well. These largely include moisture, poor air circulation, and of course improper cleaning of the walls. We will start off by explaining the role of moisture in encouraging mold growth. Because that is by far one of the biggest factors here.

While mold on interior brick walls grows where moisture content is high due to any reason ranging from pipe bursts in adjacent walls or seepage caused by heavy monsoon rains. Moreover, high amounts of moisture tend to make the environment humid and molds thrive in humid environments. This is one reason why white molds tend to grow on brick walls in bathrooms and kitchens.

Every building has a certain corner where the air circulation is just too poor to bring you any good. As previously stated in the article that mold spores are constantly circling around in the air. Thus, if the air circulation is poor it does not allow the spores to exit. In plain language, the air circulation has to be excellent in order to let the mold spores find a way out of the area.

Apart from brick walls, every surface requires regular and thorough cleaning in order to avoid bacterial and fungal growth. This applies more to cases where brick walls are constantly under white mold attacks. Failing to clean such walls increases the risk of large mold infestation and this, of course, is a massive problem for every homeowner.

How to Know if there is Mold on Brick Walls?

Usually, an unpleasant odor is among the earliest signs of white or black mold on brick walls. The smell is mostly persistent and the intensity increases as you go near the affected part of the brick wall. In addition to this, you might also see unsightly stains growing. Often, the damaged part of the wall is either wet or it becomes softer than the normal parts. You might also notice changes in your health after you sit in the room with moldy brick walls for a while.

Health symptoms associated with moldy brick walls generally include constant headaches, sneezing, coughing, irritation in eyes and nose, and trigger allergic reactions and asthma attacks. However, the symptoms may go towards the stronger side if you suffer from any illness or a weak immune system.

Dangers of Mold on Walls

We have already mentioned above how mold on brick walls tend to trigger certain health symptoms. Here it is important to know that these symptoms can speed up and become threatening for your life if the mold remains untreated. Individuals with respiratory conditions are always at greater risk in this case as it reduces indoor air quality. Other than affecting your health, mold on brick walls can cause the structure to decay. This means that the affected part becomes weak compared to the normal areas of the wall. This ends up resulting in cracks and bumps if the wall is painted.

How to Remove Mold from Brick Walls?

Timely removal of mold from brick walls to eliminate the risk of all types of dangers that come with its existence. Thankfully, the majority of mold situations can be settled at home by DIY methods using different types of solutions. If you suspect mold on brick walls in your house then here is what you need to do in order to get rid of it.

  1. Protect yourselves against the toxicity of mold spores by wearing a face mask, goggles, and rubber gloves.
  2. Cover the flooring and nearby surfaces with a thick plastic sheet. This makes sure that mold spores do not end up settling there while removing.
  3. Spray undiluted vinegar on to the moldy part of the brick wall. Spray it thoroughly to get the desired results.
  4. Wait for at least fifteen minutes and scrub off the surface with a sponge, brush or a rag. However, a hard bristled brush works best on brick walls. Make sure you get to every corner of the moldy part.
  5. Properly rinse the surface with hot water and spray the vinegar again. Do not rinse or scrub. As the purpose of spraying the vinegar again is to penetrate the surface and tackle the mold present deep down.

Here are a few things that you need to keep in mind.

  • Use a ladder for areas that are beyond your reach.
  • Discard the sponge, brush, and plastic sheet once you are done. We are saying this because the toxins might have settled on these items.
  • No mold removal should be carried out by sick and weak individuals.
  • Children and pets should be away while you are removing mold.

Final Thoughts

Do not rely on any mold removal method for long-term results. You need to take measures to avoid moisture buildup and improve air circulation for mold prevention. Also, not to forget the frequent cleaning of walls as molds thrive on dirty surfaces.

After reading this detailed guide, we are sure that you have a complete understanding of how to remove mold from brick walls. If the fungus has outgrown the initial period then it is advisable to consult any mold remediation company to avoid deter any health risks to you or your loved ones.

How to Troubleshoot Mold on Interior Walls


A detail shot of mold climbing up the corner of the wall.

Photo by: beti gorse

Related To:

Mold on walls is a common problem for homeowners, particularly in damp, humid areas like basements, crawlspaces and bathrooms. You can take steps to identify problem areas and prevent mold on walls and mold in walls — and if your home is already affected by mold growth, you can address the problem with various mold removal products.

Hallmarks of a Healthy Home

How to Troubleshoot Mold on Interior Walls

How to Troubleshoot Mold on Interior Walls

How to Troubleshoot Mold on Interior Walls

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One of the most likely places for mold on walls in the home is in the basement. Because basements often retain moisture and humidity and can be susceptible to foundation leaks, they’re prime areas for mold, which needs only oxygen, moisture and organic material to survive and thrive.

In particular, basements with old or exposed drywall can be at risk for mold on walls. Paper-coated drywall can be an optimal place for mold growth, as the organic material perfectly suits mold as a food source.

If you suspect that you have mold on walls or mold in walls in your home, there are several steps you can take to remedy the problem. First, remove all mold-covered debris, including drywall, insulation, sub-flooring and carpet. Next, you can use commercial products that contain ammonia or bleach on any hard surfaces affected by mold. Remember to wear a respirator or mask rated for mold spore exposure during any mold removal.

If you encounter mold on walls in bathrooms or showers, there’s an easier solution: vinegar. Regular applications of vinegar or a borax and water mixture should keep walls in your shower and bathroom mold free.

Can mold be inside the walls?

The most common causes of mold growing on walls are high humidity, condensation and water leaks (which are often hidden inside the wall). Condensation forms when water vapor in the air meets cold surfaces and cools to become liquid. Leaking pipes near or inside of walls are a common cause of mold.

How do you know if mold is in your walls?

To tell if black mold may be growing in your home, just follow your nose. A musty, earthy smell, like dirt and rotting leaves, is a telltale sign of mold’s presence. Stachybotrys smells especially strong. All molds need food, water and a dark, stagnant environment with temperatures that neither freeze nor boil to grow.

How do you treat mold on plaster walls?

Mix one part bleach with three parts water in a bucket. Using a scrub brush or heavy-duty sponge, vigorously scrub the mold-affected wall with the bleach/water solution until the mold spots have disappeared.

How do you remove mold from inside walls?

Scrub the surface mold stains from walls and wood trim with a mixture of 1 qt. water and 1/2 cup bleach mold cleaner to kill the mold. Use a soft brush and work until signs of the mold disappear. After scrubbing the surfaces, simply allow the bleach solution to continue to penetrate the surfaces and dry.

Can mold inside walls make you sick?

But others could make you sick. “Though small amounts of mold probably won’t hurt us, there is no species of mold that is ‘safe’ when inhaled. Mold can grow behind those walls and filter into the air through ducts or pipes. A plumber or contractor can help identify weak spots or possible leaks and prevent mold growth.

Can Mold travel through walls?

Your walls, floors, appliances, carpet, or furniture – they can all provide the food mold needs to grow. But the thing all molds need most is moisture, so you’re most likely to see mold in damp places such as bathrooms, kitchens, laundry rooms, basements, and crawl spaces.

Will mold in walls die?

FACT: With water, molds grow. Without water, molds die but the spores do not. If water returns, the spores regenerate growing colonies of mold.

Is mold behind drywall dangerous?

Toxic black mold can release spores as it feeds on common household materials such as drywall, carpet, insulation, or sub-flooring that have been exposed to moisture. These spores, if ingested or inhaled, can cause a range of unpleasant and even dangerous symptoms in humans.

Can mold dry out and die?

Dried-Out Mold Becomes Inactive

It is true that dried-out mold stops growing actively. Spores need moisture to multiply, so removing excess moisture can help you stop the spread of mold. However, any growth you have will stay exactly where it is. It does not dry up and vanish without a trace.

Can mold grow behind plaster walls?

If you have visible mold on the exterior of the drywall, is almost certain a larger amount of mold growth is present in the back of the drywall. Mold on plaster walls on the other hand are cleanable since it is not a food source, and not porous.

Can mold grow in plaster walls?

Plaster is vulnerable to mold growth.

Plaster does not necessarily provide an adequate growth environment on its own but the horsehair mixed into the plaster is organic and appealing to mold. This is also true of the wood used inside the plaster walls and the wallpaper covering the walls.

Is black mold inside walls dangerous?

Based on current research, black mold exposure is no more dangerous than any other type of mold exposure. It is impossible to avoid exposure to mold — the spores are almost everywhere around us. In high amounts or in people with allergies, exposure to any mold may cause allergy symptoms.

Does homeowners insurance cover mold?

Homeowners insurance covers mold damage if it was caused by a “covered peril.” Otherwise, an insurance company will likely not cover mold damage. Home insurance covers mold if a “covered peril” caused the mold. In that case, your home insurance policy will likely pay for repairs and clean-up.

Can mold spores go through drywall?

Even if the mold is growing peacefully inside your walls, exposure to the mVOCs can still cause adverse medical effects. Although mold spores are too big to pass through walls, the gases and vapors which the dogs are trained to detect and locate the source of, can and do permeate the walls.

How do you know if mold is behind drywall?

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How Can Consumers Detect Mold Inside Their Walls – YouTube

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How do you test if mold is making you sick?

To test for mold poisoning or allergies, your doctor may perform one of these tests:

  • Blood test. Your doctor takes a blood sample and sends it to a testing laboratory to test for the reaction of certain antibodies in your immune system to different mold species, including black mold.
  • Skin prick test.

Do air purifiers help with mold?

Yes, an air purifier can remove mold spores. However, it must include a HEPA filter which traps airborne spores and prevents them from reentering the room. Two other features it must have are an Activated Carbon filter to eliminate mold odors and a germicidal UV-C light to stop spore reproduction.

Is it safe to sleep in a room with mold?

No, it is not safe to sleep in a bedroom with mold. Indoor mold of any exposure is worrisome, but mold in the bedroom is especially so, simply due to the number of hours you spend in your bedroom breathing it in while you sleep. Beyond the immediate allergy symptoms, mold exposure often cause sleep issues, too.

Is Wet drywall ruined?

While drywall is pretty sturdy, when it’s exposed to water for too long it can get damaged. It may lose its structural integrity, becoming soft and weak. Depending on what category of water drywall is exposed to, and how wet it got, you may be able to save it. Speed is critical to avoiding mold damage, though.

What does black mold look like on walls?

Black mold often appears as slimy and greenish-black. If its water source runs out, black mold can also appear as dry and powdery. Black mold is also dangerous because it’s sometimes difficult to distinguish from other species of mold.

How to Troubleshoot Mold on Interior Walls

Killing Toxic Black Mold – How to Remove Mold Safely

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How to Troubleshoot Mold on Interior Walls

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We’ve been in our home for nearly three years. Don’t ask me how I’ve noticed this before but we actually get frost on a couple of areas of the downstairs walls. Also there is a lot of cold air moving around the bottom of the baseboards in the downstairs. Anyone know causes and solutions for.

I’m doing a remodel of my kitchen and family room. I would like to add some insulation to some interior walls to control sound. I have some left over rolls of faced insulation from another project. Is there any reason you can’t use faced insulation on interior walls? Thanks Scott

Does painting an interior wall with two coats of paint instead of only one change the color. For example, does it make the wall color darker, deeper, etc. If the wall color is brighter than you expected, will two coats of paint darken the color a little? Or are you just stuck picking another.

I have a mold problem on cinderblock walls that I need to fix and would like to take care of it myself. I have to obviously take care of what is happening outside the building so that the moisture doesn’t get to the areas that have problems, but what can I do about the inside walls. I have been.

Is it okay to insulate the interior walls of a basement? How many outlets to a 15 amp and a 20 amp breaker? Is it okay to use 12 gauge wire for the breakers? I’m running wiring to a bath, small kitchen, 1 bedroom, living room and home music studio. And is better to add more outlets to a room or.

How to Troubleshoot Mold on Interior WallsIf you presume you may have mold on an indoor wall, call an expert for the correct assessment. Mold on indoor walls can be isolated to one area, multiple locations, or in all locations of the home.

There are too many circumstances and causes for mold. The ultimate goal of the specialist is to identify what is causing the mold and to determine if it is separated or large spread.

A little water leak are separated to a location or room. Houses without running AC such as repossessions can have large spread surface area mold. Mold that leaked upstairs could be isolated to a washroom on the second floor and the room below only.

Describe to the mold professional exactly what you understand happened. There has to be a water source to develop mold to form. Then let the expert do there inspection to identify exactly what the cause of the trouble is. Anything less then ten square feet is suggest by the government for the homeowner to do themselves.

The government (EPA) suggests anything above ten square feet to be done by the professional. This is necessary when handling mold inside your home. The primary is not to cross pollute your home so you do not drive expenses up for mold removal.

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Before painting, remove mildew

How to Troubleshoot Mold on Interior Walls

How To Remove Mildew On A Painted Wall

How To Remove Mildew On A Painted Wall

Mildew is a very common problem that can cause significant damage to any home and pose health problems as well. Discovering mildew can seem like a nightmare, but with sufficient and proper information — and the right products — the problem can be taken care of and you can make any building appear in pristine condition inside and out. Follow these steps to identify and correct a mildew problem.

How to Troubleshoot Mold on Interior Walls

How To Remove Mildew On A Painted Wall

Find Suspected Mildew

Where Is Mildew?

Mildew most commonly shows up as black, grey, or brown powdery substances or stains that develop on the surfaces of the paint on walls and ceilings, on caulk, and in cracks.

A mildew problem with paint typically shows up on walls and ceilings in locations that are subject to moisture, such as outdoor patios, bathrooms, kitchens, and areas with poor ventilation, including closets.

It is important to determine the cause of the mildew, whether it be lack of ventilation, leaking pipes, water entering the house from outside, or another cause, and fix this issue.

How to Troubleshoot Mold on Interior Walls

How To Remove Mildew On A Painted Wall

Identify the Problem

The first thing to do if you discover a dark mark resembling mildew on painted walls or ceilings is to test to determine if it is mold or mildew.

Using household bleach, place a few drops on the suspect area and wait several minutes. After this time, if the spot has become lighter, it is mildew, and if it is darker or unchanged, it is mold.

A mold problem is more complicated than mildew, and may require professional help.

How to Troubleshoot Mold on Interior Walls

How To Remove Mildew On A Painted Wall

Home and Health Issues

Damage from Mildew

When mildew on painted wall and other surfaces begins to grow within your home, it can eat away at the paint, wood, and other parts of the building, causing structural weakness and deterioration around the infested area.

Whether you work in building maintenance or are a landlord, homeowner, or other individual, it is incredibly important that the home you maintain looks good and sustains its quality.

Mildew can also cause allergies and have various negative impacts on the home’s occupants, so it is crucial to remove this fungi as soon as it is discovered.

How to Troubleshoot Mold on Interior Walls

How To Remove Mildew On A Painted Wall

Follow these steps to remove mildew and return the walls to beautiful condition:

First, to prevent the mold from returning, the area must be treated to remove all traces of mildew.

Once the area has been thoroughly treated, use a primer.

Finally, apply paint or stain as you normally would.

This 3-step process will provide a solution that will leave the home looking beautiful, even after a mildew problem.

Painting Tip: It is important to avoid using flat paints or alkyd paints in humid or outdoor spaces because these paint finishes are more prone to damage, discoloration, and wrinkling, which can lead to new mildew growth.

How to Get Rid of Mold on Walls: What to Do – You are probably wondering about the right ways of how to get rid of mold on walls, especially if you see the blackish and unattractive appearance of such growth. Mold should have never been taken out lightly. It can lead to a serious problem, especially when it comes to your health and wellbeing. So, if you notice them on the wall, what should you do?

The Obvious Signs

The blackish, greenish, or brownish spots on the wall aren’t the only signs that you are dealing with mold. In most cases, when you see discoloration, bulging, recurrent black streaks, peeling or cracked paint, and a musty smell, it is highly likely that you are facing a orange mold issue. You can actually check places that are dark, damp, and humid. Areas close to the kitchen or bathrooms are usually prone to mold infestation. The plumbing fixture, the area under the stairs, or other cold and dark places should be checked regularly for early signs of mold growth. Even if you already have such mold issue in your house, the sooner you find it out, the better the outcome will be. Earlier detection will save you a lot of energy and money to solve the problem.

How to Get Rid of Molds on Walls

So, how to get rid of mold on walls, anyway? If the problem is quite mild, you can do it on your own. But mind you that you need to have the right gear that will protect you. If the problem is quite severe or you are totally clueless about the management, it is better to hire a professional cleaner.

In case you are into natural home remedies methods, you can always mix water and vinegar to clean the spot. Wait for at least two days to see whether the mold is coming back or not. If it does, you can use the mix of water and bleach. Again, bleach is very irritating even to you so use it as the last resort. Don’t forget to use the protective gear and wear the needed equipment to protect you from the mold spores as well as the dangerous solution. Remember, you are dealing with chemical solution here.

If you want to know how to remove the mold effectively, make sure that the ventilation in the affected area is improved. Open the windows, let the sunshine and the fresh air enter the house. This is one of the most effective methods in how to get rid of mold on walls without costing you a fortune.

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If you have recently found damp patches on the walls of your bedroom or living room there could be several causes including damaged guttering, cracked roof tiles and more commonly condensation.

If you do find damp problems in your home it is important to find the source of the problem and get it treated as soon as possible.

Damp can cause serious damage, not only to the appearance of home but to the structure of the property and your health. It can lead to the deterioration of masonry, cause plaster to crumble, wooden beams and floorboards to decay and leave bubbling on your wallpaper.

Unfortunately, inappropriate treatments for damp problems commonly cause more damage and leads to unnecessary expense through the installation of damp proof courses and sealing up walls rather than improve their ability to breathe.

It is important to understand the difference between old buildings and new builds in order to remedy the damp patches that are appearing in your home.

1. Old buildings are designed in such a way that they must be allowed to breathe.
2. New builds work on a system of defensive barriers which keep moisture out.

Installing insulation in your loft and walls will keep it warm in the winter months but it will also cause your home to sweat which is when problems start to happen and damp patches start to appear on your walls and ceilings.

This type of damp is called condensation, and is more commonly found on windows when the warm air circulates around a property and lands on the cold window panes which forms water droplets known as condensation.

There are however two other forms of damp that need to ruled out before we can confirm that the dampness inside your house is indeed condensation.

1. Rising Damp
2. Penetrating Damp

If the damp patches on your walls appear to rise up from ground level or there is a powdery deposit on wall surfaces close to the floor, then rising damp is probably the culprit. Rising damp usually occurs due to a failure or absence of a damp-proof course. It is very unlikely you will suffer from rising damp if you live in a flat above ground level as the damp has to come from the ground level.

How do you treat rising damp?

Improve the drainage of the site where the property is situated. Ensure that the ground surrounding the building is sloping away from your property and then check to make sure there is enough room under your floorboards for moisture to evaporate from the soil below.

Another form of damp is penetrating damp. If your interior walls are damp and it seems to be isolated to one area of the wall then it is likely a result of water from outside getting into the brickwork through cracks or gaps in the outside walls.

How do you treat penetrating damp?

Regular maintenance of your external walls should stop the damp from penetrating through in the future. Ensure the pointing and both internal and external paintwork is kept in good condition and make sure you seal the gaps around window and door frames.

If you have ruled out both of the above types of damp and there is no damaged guttering or missing roof tiles then it is more than likely that your property is suffering from condensation.

As we try to make our homes more energy efficient with double glazing, loft insulation and damp proofing we are also making our properties more airtight. This causes moisture to build up indoors and humidity levels to increase which is due to inadequate or indeed a lack of ventilation and over-efficient improvements to our homes.

If it doesn’t appear to be rising damp or penetrating damp then those damp patches that suddenly appeared on your interior walls are probably due to condensation.

If you are the homeowner or a landlord with several property we can confirm that the problem is indeed condensation by arranging a free home check where we will visit your property, carry out a relative humidity test and inspect the damp patches on your walls.

We have also written a great article featuring 14 ways to reduce condensation problems which you may find helpful.

Mold can be a major problem for homeowners. Besides the damage it can do to the infrastructure of your home, mold is a serious health risk. Even if you’re healthy, mold can lead to respiratory issues, skin problems, and headaches.

Mold doesn’t grow out of nowhere. When you start seeing signs of mold on your walls, it’s time to reassess the potential causes.

Most people understand that mold thrives where excessive moisture is present, but fewer realize how many opportunities there are for moisture to accumulate in a house. There are three common causes of the moisture that invites mold to grow, all of which are preventable with a little forethought.

Reason #1: Humidity

Humidity is the primary cause of mold on walls. If you live in a humid area, an easy solution is to purchase a dehumidifier, and move it to different rooms on a regular basis to ensure that all areas are adequately covered.

For larger spaces, it may be worth purchasing multiple dehumidifiers. Even homeowners in dry areas should watch out for appliances that use significant amounts of hot water, since this can make the surrounding air more humid even in an arid region. Clean behind your laundry machines regularly, open the windows when you shower in the bathroom or wash dishes in the kitchen—and make sure your home is well-ventilated at all times.

Reason #2: Condensation

Condensation occurs naturally on the perimeter walls of your home, which are often cooler than the air inside your house. As a result, the water in the air can experience a temperature drop when it touches these walls, and undergo a change of state to become liquid. If this liquid is left alone too long it will become an ideal breeding ground for mold.

Inspect any outside walls of your house regularly to prevent moisture buildup. It may also be worth installing double-stud walls, which all but eliminate the risk of condensation.

Reason #3: Water Leaks

The third most common cause of mold on residential walls is also one of the simplest: leaks. If your pipes drip, water is likely making its way into the framework of your house every time you turn on the tap.

As this moisture builds up over time, it becomes a potent hotbed for all kinds of bacteria, and mold becomes inevitable. Check your pipes frequently, and make sure that you take steps to keep them from leaking when the temperature in your area changes. Leaks often occur when winter arrives and the sudden cold warps the metal in your pipes, causing it to crack. Invest in insulation for your pipes, drain outdoor faucets before the water in them has a chance to freeze, and consider letting your indoor taps drip steadily overnight to keep the water in them moving.

Mold is a homeowner’s worst nightmare, but it doesn’t have to be yours. Use the tips listed in this guide to mold-proof your home, and you’ll be able to enjoy living in comfort and mold-free for as long as you want. The best part? Reducing risks of mold will ultimately increase the value of your home, and make it safer for your whole family.

How to Troubleshoot Mold on Interior Walls


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Don’t worry, you’re not alone on this one: Almost every homeowner has to brush up on how to kill mold at some point in order to maintain the upkeep of his or her living space.

How to Troubleshoot Mold on Interior Walls

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I think we can all agree that when it comes to cleaning, we’re always looking for efficient alternatives to make the process easier. Try these cleaning tips and tricks to keep your home sparkling year-round.

The best method for killing mold is to nix it before it becomes hard to manage. Tiny black spots on the surface of flooring, walls or tile are the first sign of a type of mold better known as mildew. Clean up this type of mold with a scrub brush and a common household mildew spray.

If the infestation is large, then special precautions will be necessary. Be sure to protect yourself by wearing gloves, a facemask and eye protection. If the mold has infested an area that lies beneath a carpet, then begin by removing and discarding the carpet. Clean up the area using a wet-dry vacuum and then treat it with a biocide and disinfectant, like MoldSTAT or OxB biocide. Make any necessary repairs to the once-infected area and then allow it to completely dry. You may want to speed up the process by using a fan.

If harsh chemicals aren’t the name of your game and the infestation is small, then consider a natural mold and mildew killer. Many people have found success by filling a spray bottle with tea tree oil or vinegar and spraying the area in order to kick mold to the curb.

Anywhere moisture lurks, mold may not be far behind. Patio furniture, bathroom walls, basement floors—they’re all hospitable environments for invading spores. You can fight back the attack with a sturdy scrub brush and a few potent cleaning supplies. Here’s how.

How to Troubleshoot Mold on Interior Walls How to Troubleshoot Mold on Interior Walls How to Troubleshoot Mold on Interior Walls How to Troubleshoot Mold on Interior Walls

How to Troubleshoot Mold on Interior Walls

For those who live in a damp climate—or in a poorly ventilated home—mold can be a cause for concern. That’s not only because it’s unsightly, but also because it’s unhealthy (regardless of whether you are allergy-prone). For that reason, it’s important to act fast when you encounter mold, be it on a tiled bathroom wall or on patio-furniture seat cushions.

To kill mold (or its fungal cousin, mildew), homeowners have a handful of options. Choose your weapon based on the type of surface on which the mold has been growing. Here’s how you can effectively deal with the most common instances of household mold.

Walls and Tile

Because it thrives in areas that are damp and humid, mold is most likely to appear in your bathrooms or kitchen. In such cases, a solution of diluted bleach provides the fastest way to kill mold on walls or flooring.

Prepare the solution by adding one cup of bleach into a bucket that contains about a gallon of warm water. Then proceed to scrub the mold vigorously with a stiff-bristled brush you’ve dipped in the bleach solution. Do so repeatedly. (In the bathroom specifically, where mold often inhabits the grout lines between tiles, opt for an old toothbrush rather than a larger brush).

Remember that whenever you are working with bleach, it’s important to wear the appropriate protective gear and to ensure that the room is sufficiently ventilated before you begin the job.

How to Troubleshoot Mold on Interior Walls

Fabric and Upholstery

Before you give up on any fabric that has fallen victim to mold growth, try the following procedure, which may allow you to salvage the item after all.

First, take the moldy item outdoors so that its mold spores cannot spread throughout your home. Next, use a stiff-bristled brush to clear away as much mold as you possibly can. Now pretreat the item with either bleach (white fabrics only) or a store-bought stain remover designated for use on the type of material in question. Finally, wash the fabric in hot water. When you take the item out of the wash, check it carefully for signs of lingering mold. More than one round of pretreating and washing may be necessary.


Natural Solutions

If you’re one of the many who prefer to avoid exposure to harsh chemicals like bleach, note that plain white vinegar can be a decent substitute. For best results, combine the vinegar with baking soda and water to create a briskly foaming liquid, which you can then use to scrub the moldy wall or tiled area with a stiff-bristled brush.


Preventing mold in the home is essentially a matter of minimizing dampness and maximizing air circulation. Start by installing quality vent fans both in the bathrooms and above the range in your kitchen. Once they’re installed, don’t forget to actually turn these on when you’re showering or cooking, and be sure to keep them on for about 10 minutes after you’ve finished bathing or cooking.

Written by: Contributing Writer

Written on: July 14, 2020

Mold is an unsightly fungus that grows on damp surfaces. Mold has a fur-like texture and can be green, black or white in colour. The basement is the most common place where mould is found because they are often damp and lack fresh air.

These spores can be easily inhaled and pose serious health problems if the source is not taken care of immediately.

Wearing mask and rubber gloves, mix 1 cup of bleach with 1 gallon of water. You will only need 1 cup to the gallon. The water doesn’t require a certain temperature but you will need to use a large bucket. You should seal off the rest of your home from the infected area and open one or more windows for ventilation.

  • Mold is an unsightly fungus that grows on damp surfaces.
  • The water doesn’t require a certain temperature but you will need to use a large bucket.

Apply water and bleach solution to the area and wash with rag. The bleach will kill any bacteria near the area and ensure that all of the mould is gone. Be sure that your mask is secured over your nose and mouth to keep from inhaling the bleach chemicals.

Scrub area with brush. This will ensure that the location has been washed down and scrubbed thoroughly to avoid the presence of mould.

Wash area with detergent. This will help to get rid of any bacteria still left and prevent the mould from growing again. Dry the area with clean dry rags. This will help to dry the surface completely and reduce the chance of dampness.

  • Apply water and bleach solution to the area and wash with rag.
  • This will ensure that the location has been washed down and scrubbed thoroughly to avoid the presence of mould.

After you are done cleaning the area, put sponge and rags into a plastic bag and dispose of outside the home.The smell of bleach and detergent can be very strong and you don’t want anyone to inhale the chemicals. Dispose of the mask and gloves.

Dry out your home with a humidifier. Since mould develops in damp places, you want to make sure that there are no moist areas in the walls and corners of your house. You can find a humidifier at any retail store.

Most people don’t realize they have mold in their home until they do a home reconstruction project or experience a musty, unidentifiable smell. Mold is a problem for both older and newer homes. Any time a home has been exposed to water – leaks, floods, etc. – and has been left untreated for too long, mold is given the source it needs to develop and proliferate.

Mold is a real problem, and mitigating the spread of its spores is the only way in which to protect your family’s health and property.

How to Troubleshoot Mold on Interior Walls

What Exactly Is Mold?

Mold is a fungus that, depending on the kind of mold it is, can be very dangerous to your health. It can be found in all areas of a home including mold on brick in basements, mold on a brick fireplace, mold on interior brick walls, etc. Mold development begins in dark, damp areas of a building – anywhere there is water, there can be mold.

Just How Dangerous Can Mold Be?

To anyone exposed to mold, there are some serious health issues – this is especially true of people who have a compromised or weakened immune system like the sick, elderly and infants. Even pets are prone to health problems when exposed to mold. Here are some health problems people can experience after mold exposure:

  • Breathing difficulties
  • Coughing
  • Itchy/watery eyes
  • Sneezing
  • Sore throat

Black mold exposure affects people in different ways. For example, if a person with a pre-existing condition is exposed to mold, their reactions may be way worse than people who are otherwise healthy. Also, some people are generally more sensitive to mold toxins and more allergic to mold.

How Does Mold Develop On Brick Fireplaces, Basement Walls, etc.?

One may think that mold wouldn’t grow on brick, but given the right conditions, it can. That’s because mold needs three things to thrive:

  • Darkness
  • Moisture
  • Organic materials

Any room that is not properly aired out – basements, for example – are breeding grounds for mold growth. If your bathroom contains something with brick, it could also become compromised. This is why you need to go over your home with a fine tooth comb when checking for mold.

How Common Is Mold on Brick?

While we wish we could tell you that mold on brick is not very common, it is. Mold can grow pretty much anywhere there is a moisture and food source present, and brick is a viable food source.

What Are The Common Signs Of Mold and Black Mold On Brick?

When checking for mold in your property, here are some things to keep in mind:

  • Mold cannot dissolve with water
  • Mold won’t turn into a powdery substance when wiped off
  • Mold is usually the colors of green, white, gray or black
  • A musty room is usually a sign of mold

Employ The Services of A Professional Mold Removal Service

Now, if you have mold in your house, you don’t want to wait to get the home treated. A delay in treatment could lead to a proliferation of the mold. While you could feasibly take care of the problem yourself, you really shouldn’t. Instead, we recommend calling the number on our website to get a free estimate from a professional mold removal service anywhere in the USA.

How To Stop The Development Of Mold Growth

If you’re going to stop mold growth from happening in the first place, there are a few things you need to do:

  1. First, look for any water leaks and address them.
  2. Second, be sure to air out your home and ensure all rooms are ventilated well. This is especially true of bathrooms, basements, etc.
  3. Third, a basement shower should have a vent fan or window so moisture won’t cling to the brick walls in the area.
  4. Four, use a HEPA filter to get rid of mold spores that are flying in the air.


If you have mold on brick in your property it is highly important that you don’t wait to get it taken care of. Waiting too long could cause cause the mold to expand and further damage your property and health. Call the number on our website today for a free quote from a mold remediation expert anywhere in the USA!

How to Troubleshoot Mold on Interior WallsDoes Bleach Really Kill Mold and Mildew?

Bleach has been used for years as the “cure” for mold and mildew problems on logs. However, some question

its effectiveness as a fungicide on porous surfaces. Does it really get to the root of the problem? Is it safe? Does it hurt the wood it is intended to protect? The answer is yes and no.

Is there a difference between mold and mildew?

First, it is important to understand that there is no difference between the terms “mold” and “mildew.” These words are interchangeable, and either is correct. From this point, we will be using the term “mold,” simply because that is the term more commonly used in the log home industry.

Why does mold grow?

Mold thrives when it finds a moisture source. This could be because there is an existing leak close to the area in which mold has begun to grow. Mold growth could also be because of constant exposure to nature. In either case, when moisture is allowed to seep into a porous surface, such as logs and wood or concrete trim, mold will likely follow.

Simply removing the mold from these surfaces will only act as a “band-aid.” It is important to determine the cause of the moisture, as well. If there is a leak, fixing it quickly will be an important first step to eliminating your mold problem. Mold and mildew on log walls is a common area where moisture can accumulate, if not treated properly.

What can be used to kill and treat mold?

While bleach will kill surface mold, it will not get to the roots of the mold. Bleach itself is mostly water. Therefore, if you use bleach to kill the mold, you must make sure the treated area dries quickly, ideally within 24-48 hours. Be sure to spray your cleaning solution from the bottom log to the top log, or you will have streaks which are almost impossible to remove. Once the area has been cleaned and washed, and after the wood is dry, immediately stain the area. This will seal the wood and prevent future mold issues. Many stains now include a fungicide. After many years of searching for better products, we now recommend Sikkens, an oil-based stain that will protect your logs for years, and is backed by a very good warranty and knowledgable people to help when needed.

What are some alternatives to bleach?

There are several EPA-registered products on the market today that can be used as an alternative to bleach. Concrobium Mold Control contains no bleach or ammonia. It is best used for pre-treating building materials for mold resistance. Shockwave is a concentrated ammonium chloride cleaner and disinfectant, which can be used to sanitize and treat porous surfaces, such as logs and wood treatments. Other products include Sporicidin Disinfectant Solution, Microban, and Fosters 40-80. These three are mold remediation products, which absorb into the wood and penetrate to the roots of the mold. All of these products can be purchased at your local home improvement stores and are relatively inexpensive. Be sure to check which cleaner works best with your desired stain, as this can cause stains or paints to fail.

Mold is, unfortunately, a common issue on, and in some cases inside, homes of all types. While all materials will exhibit mold if the proper conditions arise, it is important to treat your logs and exposed wood or concrete based trim with the proper materials. Be sure to use good quality, kiln dried, or approved air dry logs to bring the moisture content down before treating. Also important is the amount of time your home build is left open and susceptible to moisture. Be sure to clean, dry, and stain before mold has the opportunity to become an issue. If, however, the build takes longer, or your site conditions are prone to mold, there are many methods available to combat this problem. For more information, please give us a call. We would be happy to help you decide which process is right for removing any occurrence of mold and mildew.

Update 2-11-19:

As a follow-up, we have been testing a product called RMR-86 with very good early results. We will be testing this further before we can make a firm commitment. If you are one to press forward with new products, this might be an interesting experiment. Please be sure to always test products in areas that are hidden from plain view in case any issues occur. Happy testing, and let us know your results. We love to find products that work, and since we don’t often have mold, it makes it a bit tougher to test these products.