Mold On Roof Plywood

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.

Mold growth on attic roof sheathing is a common issue in cool climates such as the pacific northwest. At the intersection of the plywood overlays the upper sheets contain black mold spreading about 2 3 up the slope. Fungal spores hyphae and conidiophores the spore producing structures of mold. When moisture is present on the plywood mold spores can begin to attach and grow.

In the vast majority of cases the mold growth is caused by condensation. Organic materials to feed off moisture warmth and darkness. It also dips along the edge where the moldy plywood exists. It is not required to eliminate all discolorations from wood.

When warm moist air from your home rises up it has the ability to go to your attic and become condensation which attaches to attic sheathing. Mold requires a few key elements in order to grow and thrive. It is not necessary to remove all stains from wood. However the plywood roofing over the front porch area was all covered with mold.

So it looks like cold roof effect mostly affects the sheathing itself but the lumber under it is relatively safe from it. 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. This occurs when the temperature of the sheathing drops below the dew point creating a thin layer of moisture on the substrate.