From the outsidethere are a couple of dips in the plywood which appear as though thes areas were loaded with shingles during re roof.
Mold on roof plywood.
It also dips along the edge where the moldy plywood exists.
Mold on the underside of roof sheathing is also very common.
Fungal spores hyphae and conidiophores the spore producing structures of mold.
Mold can form but often it is.
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.
The mold itself may have a cottony texture but can also be velvety leathery or.
It is not necessary to remove all stains from wood.
This occurs when the temperature of the sheathing drops below the dew point creating a thin layer of moisture on the substrate.
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.
However the plywood roofing over the front porch area was all covered with mold.
The longer the water sits in the attic the more likely it is that mold will develop in the insulation and wood.
No mold on the framing that supports that plywood though.
How to get rid of black mold on wood and plywood.
How to remove mold from wood framing plywood sheathing tongue and groove subfloor or roof decking the object in cleaning mold from a wood surface is to remove all fungal material from the surface of the wood.
Another issue that commonly leads to mold growth in the attic is a leaking roof.
The item in cleansing mold from a wood surface area is to get rid of all fungus product from the surface area of the wood.
Fungus spores hyphae as well as conidiophores the spore creating frameworks of mold.
Mold growth on attic roof sheathing is a common issue in cool climates such as the pacific northwest.
So it looks like cold roof effect mostly affects the sheathing itself but the lumber under it is relatively safe from it.
Rather than water vapor coming up from the house water comes in through the roof.
Mold usually causes a musty odor and may cause staining that may be black brown gray white yellow or green.
Mold that grows on the underside of roof sheathing due to ideal mold growth conditions being present.
In the vast majority of cases the mold growth is caused by condensation.