Attic hatch or door.
Attic side sheathing.
Check for areas of dark discoloration staining of wood e g.
Add weatherstripping around the perimeter and a sweep to the door of a walk up attic.
I ve seen osb oriented strand board.
Use a zippered insulated tent to keep the enclosure draft free attic tent at 7 attic cover insulator 120.
Rafters sheathing joists attic side of fascia boards etc.
Mold on attic sheathing.
The best way to provide that sheathing is to use a rigid material.
Roof leaks will often lead to a small localized area of attic mold near where the leak is occurring.
Below are a few ways to check for possible roof leaks.
Mold growth on attic roof sheathing is a common issue in cool climates such as the pacific northwest.
Affix rigid foam insulation to the attic side of the hatch or door.
The effects of mold exposure depend on your health and the amount of mold you re.
Georgia recognized this problem about a decade ago and started requiring all attic kneewalls to have sheathing on the attic side and to be insulated to at least r 18.
In the vast majority of cases the mold growth is caused by condensation.
Mold on the underside of roof sheathing is also very common.
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.
Attic spaces are one of the most common places in a home for mold to be found growing.