The mold will simply grow on top of and through the layer of paint.
Fungus on roof sheathing.
Generally tearing off a roof and roof sheathing and perhaps roof framing to remove mold would not be sensible nor cost justified.
Mold on the underside of roof sheathing is also very common.
After cleaning off the roof treat the roof with a moisture resistant solution to help keep moisture off.
Painting or sealing it will not address the problem.
It s never fun to find out that your house has mold but the fix for mold in the attic is usually quite straightforward and doesn t involve the services of any mold remediation experts.
Finally rinse your shingles with water to wash away the chemicals.
Mold that grows on the underside of roof sheathing due to ideal mold growth conditions being present.
Simply mix the bleach and water spread the mix over your roof with a mop and hose the roof off.
Proper attic ventilation in your home is important for many reasons.
After several years of this there may be dark rings around protruding roofing nails and larger dark spots or areas on the roof sheathing and or exterior gable walls.
The presence of mold in your attic is often the result of poor ventilation insufficient insulation moisture from a roof leak or improper venting from your bathrooms or kitchen.
This will be the perfect time to check on your gutters to make sure they are draining properly.
Because wood is porous it may be difficult to remove the mold stains from sheathing but you can kill the mold by cleaning the sheathing with bleach and water.
Mold can form but often it is.
If you see black stuff covering or growing on the roof sheathing in your attic it s probably mold.
Blocked soffit intake vents are ineffective in providing good under roof or attic ventilation causing wet and possibly moldy roof sheathing on those roof sections where no venting is provided.
Left unattended the moisture and fungal growth will eventually degrade the roof sheathing.
You must address the underlying moisture issue in order to stop the mold growth.
Next mix 1 quart of bleach 1 gallon of water and cup of trisodium phosphate to make a cleaning solution.
After that spray the solution on your roof let it sit for 15 20 minutes then scrub off the mold.
