Generally tearing off a roof and roof sheathing and perhaps roof framing to remove mold would not be sensible nor cost justified.
Fungus on roof sheathing.
Left unattended the moisture and fungal growth will eventually degrade the roof sheathing.
Finally rinse your shingles with water to wash away the chemicals.
The mold will simply grow on top of and through the layer of paint.
You must address the underlying moisture issue in order to stop the mold growth.
Mold that grows on the underside of roof sheathing due to ideal mold growth conditions being present.
After cleaning off the roof treat the roof with a moisture resistant solution to help keep moisture off.
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.
Mold can form but often it is.
Mold growth provided it is not just cosmetic mold which can simply be left alone can be cleaned from wood surfaces by blasting scrubbing or even simple surface wiping depending on the surface accessibility and smoothness.
Mold on the underside of roof sheathing is also very common.
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.
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.
If you see black stuff covering or growing on the roof sheathing in your attic it s probably mold.
Next mix 1 quart of bleach 1 gallon of water and cup of trisodium phosphate to make a cleaning solution.
Bleach kills fungus on contact.
Simply mix the bleach and water spread the mix over your roof with a mop and hose the roof off.
Painting or sealing it will not address the problem.
Combine 1 2 cup chlorine bleach with.
Proper attic ventilation in your home is important for many reasons.
This will be the perfect time to check on your gutters to make sure they are draining properly.