Attic hatch or door.
Attic side sheathing.
Check for areas of dark discoloration staining of wood e g.
Mold on attic sheathing.
Attic spaces are one of the most common places in a home for mold to be found growing.
Pull down stair or ladder.
Below are a few ways to check for possible roof leaks.
Use a zippered insulated tent to keep the enclosure draft free attic tent at 7 attic cover insulator 120.
Roof leaks will often lead to a small localized area of attic mold near where the leak is occurring.
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.
Affix rigid foam insulation to the attic side of the hatch or door.
This occurs when the temperature of the sheathing drops below the dew point creating a thin layer of moisture on the substrate.
Mold on the underside of roof sheathing is also very common.
I ve seen osb oriented strand board.
Rafters sheathing joists attic side of fascia boards etc.
The best way to provide that sheathing is to use a rigid material.
The effects of mold exposure depend on your health and the amount of mold you re.
Mold growth on attic roof sheathing is a common issue in cool climates such as the pacific northwest.