Attic mold usually comes from moisture. Common causes are warm indoor air condensing on cold roof sheathing, roof leaks, and bathroom or kitchen fans venting into the attic. Removing the mold works only if the moisture cause is fixed too.
What causes mold in an attic?
The EPA lists condensation from high humidity or cold spots as a moisture source for mold. Attics are a common place for this to happen in cold weather.
- Bathroom, kitchen or dryer exhaust venting into the attic instead of outside.
- Warm indoor air leaking into the attic through gaps around lights, hatches and pipes.
- Blocked or missing soffit and roof vents.
- Roof or flashing leaks.
- Ice dams that push water under shingles.
What does attic mold removal involve?
| Step | What happens |
|---|---|
| Inspection | The company checks sheathing, rafters, insulation, vents and fan ducts. |
| Moisture fix | Fans are vented outside, air leaks sealed and ventilation corrected. |
| Removal | Mold is cleaned or removed from wood, and wet or moldy insulation is replaced. |
| Verification | The attic is checked once the work is done. |
Can I just paint over attic mold?
No. Paint over mold tends to peel, and the growth continues underneath. Clean and dry the surface first, and fix the moisture problem.
How do I check a mold company in Pennsylvania?
Most home improvement contractors in Pennsylvania must register with the Office of Attorney General. The rule applies to contractors who do $5,000 or more of home improvement work a year.
- The registration number appears as “PA” plus a number on contracts, estimates and ads.
- You can check a registration by calling the Attorney General at 1-888-520-6680.
- Registration is not an endorsement or a quality rating.
- Contracts must be in writing, with the price, start and finish dates, a description of the work and your cancellation rights.
Will insurance cover it?
It depends on your policy and the cause. Many policies limit or exclude mold, and some cover mold that results from a sudden covered water loss. Check the mold and water sections of your policy and ask your agent.
For problems with how an insurer handles a claim, contact the Pennsylvania Insurance Department at 1-877-881-6388.
How getting help works
SEPA Mold Removal is a free referral service, not a mold company. You describe the problem in the form, and independent local mold companies contact you to set up an inspection or a quote.
Questions to ask the company that comes out
- What is your Pennsylvania Home Improvement Contractor (HIC) registration number?
- Which mold certifications does your crew hold, such as IICRC AMRT or ACAC?
- Will I get a written scope covering containment, HEPA filtration and how the moisture source gets fixed?
- Is the inspection or testing done by an independent assessor, separate from the company doing the removal?
- How will you confirm the job is finished? Ask about post-remediation verification or clearance testing.
- Can you send a certificate of insurance and your warranty terms in writing?
Attic mold help by area
Local details by county: Bucks, Montgomery, Chester and Delaware. See all Pennsylvania areas.
Attic mold questions
Dark staining on roof sheathing often points to condensation and mold. An inspection can confirm the cause.
Insulation that is wet or moldy usually needs to be replaced. Ask the company to include it in the written scope.
Only if a roof leak caused it. Many attic mold problems come from ventilation and air leaks.
Ongoing moisture can damage wood over time. Fixing the moisture source protects the structure.
Get matched with a local mold company
Tell us what you’re seeing and where. The service is free. Most property owners hear from a local mold company in 24 hours or less.
SEPA Mold Removal is a free referral service. Your request goes to independent local companies through a partner network. See our Privacy Policy.
Sources
- EPA Mold Course, Chapter 1
- EPA: Mold Cleanup in Your Home
- Pennsylvania Attorney General: Home Improvement Consumer Protection Act
- Pennsylvania Insurance Department: file a complaint
Last reviewed: October 2026