How To Detect Mold Behind Walls: 5 Factors To Consider

Molds are a tremendous annoyance to your home and they can be harmful to your family. How to detect mold behind walls? Well, that’s exactly what we’re gonna talk about.

You got the right article to read, so hang on tight as we give you the best ways to detect mold behind your walls. You can also check out this related article about how to remove mold from inside walls.

how to detect mold behind walls


The 5 Most Common Mold Growth Causes

Water at the foundation, flooding, roof leaks, leaking pipes, and low humidity and ventilation are the five most typical sources of mold.


1. Foundational water

Keep an eye out for a buildup of water around the foundation of your home. If there is a lot of water, this can cause foundational issues for your property.

Gathering rainwater at your home’s foundation can be avoided by sloping your yard outwards from your foundation. Damp basements are another factor in the same vein. Basements typically do not have adequate ventilation.

This suggests that basements may have higher humidity or moisture levels than other rooms in the house. Furthermore, basements are frequently colder, which means that more condensation happens, leading to humidity and basement problems.


2. Inundation

Mold can also be caused by flooding. Mold cleanup issues can be difficult to prevent if your property has been flooded.

Your home will be wet, and it may take some time for it to dry. It may take weeks to dry out your home.

This signifies that mold has a high chance of growing. Keep in mind that mold only takes twenty-four hours to grow.


3. A leaking roof

Roof leaks, such as pipes leaking in the attic, may go undetected until the mold has formed. Check your attic for leaking regularly to keep it in good shape. Keep a lookout for wet spots, especially on the ceiling right before the attic.


4. Pipes are leaking

The most typical source of mold formation is water spilling from a pipe. The worst form of leakage is the kind you can’t see, such as above a ceiling or inside a wall. Hidden leaks breed mold, and the mold may have already spread.


5. Low humidity

Mold can grow in a poorly ventilated home. Inadequate ventilation causes pockets of wet, stagnant air, which encourages mold growth. Humidity is produced by steam and evaporating water. This must maintain a balanced moisture level for the air to move outside.

Keep in mind that mold can only grow in certain conditions. This includes ample time to grow, humidity, water leaks or other sources of moisture, temperature, darkness, a food source such as cotton, drywall, or wood, and mold spores.


Detecting Mold Behind Walls

Mold might also manifest as peeling wallpaper. While some scuffing and discoloration are unavoidable with wallpaper, unusual surface or peeling anomalies such as crackling or bubbling can indicate wall dampness. 

Remember that moisture is always a reliable precursor of mold. Pay close attention to any distorted areas that seem damp.

You can prevent mold from forming in your cooling or heating systems by having a professional inspect them regularly. Dark grout between bathroom tiles is another sign of mold in the home.

Even if this type is most likely innocuous, floods in the neighboring room or a leak in the bathroom plumbing could develop a more poisonous fungal variety that only professionals can remove. A sample sent for testing will tell you whether or not your shower is safe to use.

Mold could also be to blame if you have pre-existing respiratory issues that seem to flare up after spending extended periods at home. Many common household molds do not affect those who do not have breathing problems.

However, it may exacerbate asthma in people who already have it. If your breathing difficulties seem to be getting worse with no clear cause, consider getting a mold inspection and seeing a doctor. You can see this related article about how to get rid of mold on concrete block walls.

Mold can come in a variety of colors, textures, and shapes. They can seem like dripping, green slime, or a grey fluff that appears benign. If you have peeling paint on your walls or an unusually high level of room humidity, check for double leak pipes.

Mold may be the source of a musty odor in your home, even if you have performed a thorough general cleaning. If there is a greater odor in one portion of the house or a room corner, this could indicate that mold is the source of the musty stench and not a lack of cleaning. If you’ve taken out the garbage, steamed the drapes, and scrubbed the carpet and the musty odor persists, it may be mold.



Even if you have completed a thorough general cleaning, mold could be the source of a musty odor in your home. If there is a stronger odor in one area of the house or a room corner, this could indicate that mold is causing the musty odor rather than a lack of cleaning.

If the musty odor lingers after you’ve taken out the garbage, steamed the draperies, and scrubbed the carpet, it’s probably mold. If you’re hesitant to do it yourself, you can always rely on mold wall inspection and removal experts for a safe and sound approach. Hopefully, we gave you all the necessary information about how to detect mold behind walls.

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