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.
Fungus on roof sheathing.
To clean mold off a roof start by putting on rubber gloves a breathing mask and goggles to protect yourself from the harsh cleaning chemicals.
If there is a leak in the roof plumbing or windows the mold will reappear if the water is still getting into the.
In the vast majority of cases the mold growth is caused by condensation.
This occurs when the temperature of the sheathing drops below the dew point creating a thin layer of moisture on the substrate.
Mold on attic sheathing.
Generally tearing off a roof and roof sheathing and perhaps roof framing to remove mold would not be sensible nor cost justified.
It was built in 1978 and when we bought it a couple of years ago the roofing was replaced as part of the sale agreement along with a couple sheets of roof sheathing additional round 3 soffit vents put in and mold mitigation.
Mold on the underside of roof sheathing is also very common.
Next mix 1 quart of bleach 1 gallon of water and cup of trisodium.
A timely article as we are experiencing mold on our attic sheathing in our portland.
Cleaning the sheathing kills the mold and prevents it from producing spores.
Then use a long handled brush to scour the surface of the shingles and loosen stuck on mold while it s dry and brittle.