The short answer
Assess the Mold Damage
First, determine if the mold is only on the surface or if it has soaked into the drywall. Press gently on the area with a gloved finger. If the drywall feels soft, spongy, or crumbles, the mold has likely penetrated deeper, and the section should be cut out and replaced.
Small patches, roughly the size of a hand or smaller, that are dry and not spreading may be cleaned. Larger areas, or any mold that returns after cleaning, call for professional help. If you live in Caldwell, keep a note of where you have seen mold so you can track whether it comes back.
- Wear gloves, goggles, and an N95 respirator
- Seal off the room with plastic sheeting
- Use a HEPA vacuum to remove loose spores
- Avoid mixing cleaning products
- Open windows for ventilation
Clean Small Surface Mold
For minor surface mold, mix a small amount of dish soap with water in a spray bottle. Spray the area and scrub gently with a soft brush or sponge. Do not soak the drywall, as excess moisture can worsen the problem. Dry the spot thoroughly with a fan or dehumidifier afterward.
Bleach is not recommended on drywall because it does not penetrate porous surfaces and can be harsh to breathe. A detergent solution is safer for you and the wall. If mold remains after scrubbing, the drywall needs to be removed.
Cut Out and Replace Affected Drywall
If the drywall is damaged or the mold is widespread, cut out the affected section. Use a utility knife to score the drywall along the center of the studs, then remove the piece. Check the framing behind it for mold or rot, and treat that area with a suitable antimicrobial product.
Replace the drywall with new pieces, then tape, mud, and paint. This is a job that many homeowners handle, but if the mold extends over a large area or is near electrical outlets, consider hiring local water damage pros. They have the tools to dry out the wall cavity fully.
If you suspect the mold goes deeper than the surface, or if there is a musty smell that persists, a water damage inspection can help identify hidden moisture. The pros use moisture meters to find wet spots that are not visible.
- Cut back to the center of the nearest stud
- Remove insulation if it is wet or moldy
- Dispose of moldy drywall in sealed plastic bags
- Check for leaks or high humidity before closing the wall
Fix the Moisture Problem
Mold will come back unless you stop the water source. Look for plumbing leaks, roof leaks, or condensation on cold pipes. In a semi-arid climate with cold winters and hot dry summers, indoor humidity can spike from cooking, showers, and drying clothes indoors, so use exhaust fans and a dehumidifier if needed.
A leak detection service can pinpoint hidden leaks behind walls or under floors. If you have had a flood or major leak, structural drying and dehumidification may be necessary to dry out wall cavities and studs before you close everything up.
Know When to Call the Pros
If the mold covers more than a small patch, if you have health concerns like asthma, or if the drywall is deeply saturated, call local water damage pros. They can remove large sections safely and dry the framing properly. They also have commercial equipment to reduce airborne spores during the process.
Your insurance policy may cover mold cleanup if it results from a covered water loss. Policies vary, and your insurer decides what is covered. Check your policy and ask your agent before you start any work. Keep receipts for materials and any professional services you pay for.
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Call Now (208) 729-2441Frequently asked questions
Can I just paint over moldy drywall?
Painting over mold does not kill it. The mold will continue to grow underneath and may eventually bleed through the paint. You need to remove the mold first, and if the drywall is damaged, replace it before painting.
Is it safe to clean mold with bleach?
Bleach can be harsh and does not penetrate drywall well. It may actually feed mold on porous surfaces. A mild detergent and water solution is safer and often effective for surface mold. For deep mold, removal is necessary.
How do I know if mold is toxic?
All mold can cause health problems, especially for people with allergies or asthma. If you feel unwell, see a doctor. It is not possible to tell toxicity by sight, so treat any mold with caution and take protective measures.