Mold and mildew buildup on walls is most prevalent during winter months due to increased moisture concentration and condensation. Stains on walls from mold and mildew are much more than just an aesthetic issue. Here are the most effective ways to remove them:
Causes of Mold and Mildew
During winter months when there’s a significant temperature difference between indoor and outdoor air, layers of mold and mildew commonly form on walls. Mold buildup is most prominent in corners where air circulation is weaker, leading to higher moisture concentration. Additionally, condensation forms on poorly insulated walls and in places where concrete beams replace blocks, such as above windows and in corners.
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Mold on walls is not merely an aesthetic issue. Besides unsightly stains, bacteria and fungi accelerate the deterioration of the apartment and cause numerous health problems, including asthma, bronchitis, allergies, and rheumatic ailments.
Effective Removal Methods
Bleach Treatment
Bleach can eliminate almost any type of indoor mold it comes into contact with, along with spores, leaving the surface clean and resistant to future mold development. Unfortunately, bleach is effective only on non-porous materials like tiles, bathtubs, and glass. Bleach cannot penetrate porous materials, thus not reaching mold growing beneath the surface of materials like wood and walls. Using bleach on these materials kills surface mold but leaves mold roots intact, allowing mold to return soon after.
To use bleach for mold removal, mix one cup of bleach with ten cups of water. Apply the mixture to non-porous surfaces with mold using a spray bottle or by using a bucket and sponge or cloth. There’s no need to rinse the surface afterward unless it’s used for food preparation or comes into contact with children or pets.
Vinegar Treatment
Vinegar is a mild acid that can kill up to 82% of mold species. It offers certain advantages as a natural and safe option. Vinegar is non-toxic and doesn’t emit hazardous gases like bleach.
To remove mold using vinegar, use white distilled vinegar, which is inexpensive and widely available. Pour undiluted vinegar into a spray bottle. Spray vinegar onto the moldy surface and let it sit for an hour. Wipe the sprayed area with water and let it dry. Any vinegar odor should dissipate within a few hours.
Hydrogen Peroxide Treatment
Hydrogen peroxide eliminates mold as it is a fungicidal, virucidal, and bactericidal agent. It’s a good alternative to chlorine-based bleach because it’s safe to use and doesn’t harm the environment or leave toxic residues or fumes.
You can purchase 3% hydrogen peroxide inexpensively at any pharmacy. It effectively kills mold on many materials such as clothing, floors, bathrooms, walls, and various items like kitchen appliances. Since hydrogen peroxide is a bleaching agent, it also helps remove stains left by mold.
Pour 3% hydrogen peroxide into a spray bottle. Thoroughly spray the moldy surface with the peroxide solution until the moldy area is saturated. Allow the surface to sit for 10 minutes while the hydrogen peroxide kills the mold. Then, wipe the surface to remove mold and any remaining stains. Finally, wipe the surface with water to remove any remaining mold spores.
Baking Soda Treatment
Baking soda, also known as sodium bicarbonate, is a well-known natural and safe household cleaning agent. It’s mild and harmless to both families and pets. Besides removing mold, baking soda also absorbs odors, making it useful for eliminating the musty smell mold leaves behind in homes.
To clean mold with baking soda, mix one-quarter tablespoon of baking soda with a cup of water in a spray bottle. Shake the bottle to dissolve the baking soda and spray the moldy area with the solution. Then, use a sponge or scrubbing brush to remove the mold from the surface. Once the mold is removed, rinse the area with water to remove any residue and then spray the surface again with the baking soda solution to prevent mold regrowth.
Additional “Hippie” Tips
Although less effective, some alternative natural methods can be useful for minor wall stains. One such method is tea tree oil. Mix a teaspoon of tea tree essential oil with a glass of water and spray it on the surface you want to clean. Given tea tree’s proven antiviral, antibacterial, and antifungal properties, this essential oil is an excellent choice in the battle against mold. You can also mix 20 drops of grapefruit seed essential oil with two cups of water and apply it in the same way. Spray and let it dry.
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