After cleaning off the roof treat the roof with a moisture resistant solution to help keep moisture off.
Fungus on roof sheathing.
After that spray the solution on your roof let it sit for 15 20 minutes then scrub off the mold.
Painting or sealing it will not address the problem.
Bleach kills fungus on contact.
Proper attic ventilation in your home is important for many reasons.
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.
You must address the underlying moisture issue in order to stop the mold growth.
Mold can form but often it is.
This will be the perfect time to check on your gutters to make sure they are draining properly.
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.
Next mix 1 quart of bleach 1 gallon of water and cup of trisodium phosphate to make a cleaning solution.
If you see black stuff covering or growing on the roof sheathing in your attic it s probably mold.
Simply mix the bleach and water spread the mix over your roof with a mop and hose the roof off.
Mold that grows on the underside of roof sheathing due to ideal mold growth conditions being present.
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.
Mold on the underside of roof sheathing is also very common.
Left unattended the moisture and fungal growth will eventually degrade the roof sheathing.
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.
Combine 1 2 cup chlorine bleach with.
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.
The mold will simply grow on top of and through the layer of paint.