Not wet but some areas slightly damp.
Plywood in attic is wet.
My attic is located above my garage and currently the former owner had random pieces of plywood placed up there.
Attic venting attic moisture and ice dams.
Some screwed others not.
Wet sheathing was found in attic area due to lack of venting.
It is never a good idea to install a roof over wet plywood or any type of roof sheathing.
Your plywood deck should dry out in a reasonable amount of time if the attic space directly beneath the roof is vented to allow excess heat and trapped moisture vapors to escape.
I wanted to add more plywood to the area and wanted to know if any specific type i should use.
Even if conditions are conducive to mold growth elevated moisture plywood made from a fungal resistant wood will resist mold growth for quite a while.
If the sheathing either boards plywood or composite board along the lower edge of the roof is soaked and you can see a corresponding accumulation of ice on top of the roof ice damming is occurring.
Attic insulation combination of fiberglass covered by cellulose.
The black attic mold shown here confirms that this attic had a serious venting and moisture problem including moisture from sources lower in the building.
Black mold in attics.
Does mold on attic sheathing have to be removed.
What to do about a wet attic.
Trapped water will boil when the sun heats the roof and the shingles will then have small pits where.
Some woods are much more resistant to rot and fungal attacks.
Mold growing on the sheathing in your attic is a serious problem that shouldn t be ignored.
Wanted to add more cellulose but installer said it would make wet roof worse.
The decision regarding the thickness of plywood to use for the subfloor in the attic has a lot to do with how you intend to use the attic and it also depends on the spacing of the ceiling joists.
Plywood is original 49 years old.
I assume 3 4 inch but there are many types brands to choose from.
Quite often the roof flashing is defective and needs replacement.