Mold on drywall is a common but serious problem that can threaten both the structural integrity of your home and the health of its occupants. Drywall, being porous, is especially susceptible to mold growth, particularly after water damage from leaks, flooding, or excessive humidity. While minor mold issues may be handled by homeowners, larger infestations require professional remediation to ensure safe and thorough cleanup.
At PNW Restoration, we are proud to be recognized as a premier water damage restoration company with the expertise to address mold issues of any size. Our certified professionals understand how to treat affected areas safely and prevent future growth. In this blog, we’ll walk you through how to safely clean mold from drywall, when to call in the experts, and how to protect your home going forward.
Understanding the Risks of Mold on Drywall
Mold can grow rapidly—within 24 to 48 hours—under the right conditions: moisture, warmth, and organic material (such as drywall paper). Not only is mold unsightly, but it can also produce allergens, irritants, and even toxic substances (like mycotoxins in the case of black mold). Prolonged exposure can lead to respiratory problems, skin irritation, and other health issues, especially for individuals with asthma or weakened immune systems.
Drywall mold should be addressed promptly to minimize these risks and prevent the spread to other areas of your home.
Step-by-Step Guide: Safely Cleaning Mold from Drywall
Step 1: Assess the Situation
Before diving into cleanup, determine the extent of the mold growth:
- Small areas (less than 10 square feet) may be safe for DIY cleaning.
- Larger infestations, or mold caused by contaminated water (like sewage), should be handled by professionals like PNW Restoration.
If you’re unsure, it’s always safer to get an inspection by a licensed mold remediation expert.
Step 2: Gather Your Protective Gear
Safety is critical when dealing with mold. Equip yourself with the following:
- N-95 respirator mask
- Safety goggles
- Rubber or nitrile gloves
- Long-sleeved clothing and pants (that can be washed or discarded)
Seal off the affected area using plastic sheeting and tape to prevent spores from spreading during cleanup.
Step 3: Ventilate the Area
Open windows and use an exhaust fan blowing outward to promote airflow. Avoid blowing air into the rest of the home as this can spread mold spores.
Step 4: Prepare Your Cleaning Solution
For small mold patches on drywall, mix one of the following:
- White vinegar (undiluted)
- Hydrogen peroxide (3% solution)
- Commercial mold cleaner (follow label instructions)
- Bleach solution (1 cup bleach to 1 gallon of water) – only if proper ventilation is available and not mixed with other chemicals
Do not mix vinegar with bleach or hydrogen peroxide—it can produce toxic fumes.
Step 5: Clean the Mold
- Light surface mold – Dampen a cloth or sponge with your cleaning solution and gently scrub the area. Avoid oversaturating the drywall, as too much moisture can worsen the problem.
- Deeper or stubborn mold – Use a soft brush to scrub lightly. If the mold has penetrated the drywall deeply, cleaning will not be sufficient. That section of drywall will need to be removed and replaced.
After cleaning, wipe the surface with a damp cloth and allow it to dry thoroughly. Use fans or a dehumidifier to speed up the drying process.
Step 6: Dispose of Contaminated Materials
Place all used rags, sponges, and protective clothing in sealed plastic bags before discarding them. Wash your hands and any exposed skin thoroughly.
When to Call a Professional Like PNW Restoration
If any of the following apply, it’s time to call PNW Restoration:
- Mold covers an area larger than 10 square feet
- You suspect black mold or toxic mold types
- The drywall feels soft, warped, or crumbling
- Mold returns after repeated cleaning
- You or your family experience health symptoms while in the affected area
PNW Restoration specializes in comprehensive mold remediation and water damage restoration. Our IICRC-certified team uses advanced equipment and proven techniques to ensure your home is safe, clean, and mold-free.
How to Prevent Mold from Returning
Preventing mold from growing again is just as important as cleaning it up. Here’s how:
- Fix leaks promptly – Whether from roofs, plumbing, or windows
- Control humidity – Keep indoor humidity below 60% using dehumidifiers or AC
- Improve ventilation – Especially in kitchens, bathrooms, and basements
- Use mold-resistant drywall – Especially in high-moisture areas
- Inspect regularly – Keep an eye on vulnerable areas
Trust the Experts at PNW Restoration
DIY methods can be effective for minor mold problems, but when in doubt, turn to the professionals. At PNW Restoration, we offer fast, reliable, and safe mold remediation services that protect your home and health. We understand the urgency mold presents and provide tailored solutions to meet your unique needs.
Don’t let mold take over your home—call PNW Restoration on (971) 247-3661 today and breathe easier tomorrow.
FAQ
Is it safe to clean mold from drywall myself?
If the mold covers an area smaller than 10 square feet and hasn’t penetrated deeply, it may be safe to clean it yourself using proper safety gear and cleaning solutions. For larger or recurring infestations, it’s best to call professionals like PNW Restoration.
What safety gear should I use when cleaning mold from drywall?
You should wear an N-95 respirator mask, safety goggles, rubber gloves, and long-sleeved clothing to protect yourself from inhaling or contacting mold spores during cleanup.
What cleaning solution works best on moldy drywall?
White vinegar, hydrogen peroxide (3%), or a bleach solution (1 cup bleach to 1 gallon of water) can be effective. Never mix cleaning agents, and always ventilate the area well during use.
Can I paint over mold on drywall?
No. Painting over mold does not solve the problem—it may trap moisture and allow mold to grow underneath. The mold must be fully cleaned and the drywall dried before painting.
When should drywall be replaced instead of cleaned?
If the drywall is soft, crumbling, warped, or if mold has deeply penetrated the surface, it should be removed and replaced. PNW Restoration can assess the damage and safely handle any necessary demolition.
How can I tell if mold is growing behind drywall?
Signs include a musty odor, staining on the wall surface, peeling paint, or visible mold at the edges. A professional inspection from PNW Restoration can confirm hidden mold with moisture meters or thermal imaging.
How long does it take for mold to grow on drywall after water damage?
Mold can start growing within 24 to 48 hours of water exposure. That’s why fast response and drying—like the emergency services offered by PNW Restoration—are critical.
Is black mold more dangerous than other types?
Some black molds, such as Stachybotrys chartarum, can produce toxins that may cause severe health issues. Regardless of color, all molds should be treated with caution and remediated by professionals if the growth is extensive.
Can a dehumidifier help prevent mold on drywall?
Yes, maintaining indoor humidity levels below 60% using a dehumidifier can significantly reduce the risk of mold growth on drywall and other surfaces.
Why should I choose PNW Restoration for mold remediation?
PNW Restoration is a trusted, certified mold remediation and water damage restoration company. We use advanced techniques, ensure safe removal, and help prevent future mold growth—protecting both your property and health.
