Mold On Roof Plywood

In the vast majority of cases the mold growth is caused by condensation.

Mold on roof plywood. Organic materials to feed off moisture warmth and darkness. Mold growth on attic roof sheathing is a common issue in cool climates such as the pacific northwest. Mold requires a few key elements in order to grow and thrive. However the plywood roofing over the front porch area was all covered with mold.

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. 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. Fungus spores hyphae as well as conidiophores the spore creating frameworks of mold. It is not necessary to remove all stains from wood.

No mold on the framing that supports that plywood though. At the intersection of the plywood overlays the upper sheets contain black mold spreading about 2 3 up the slope. 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. From the outsidethere are a couple of dips in the plywood which appear as though thes areas were loaded with shingles during re roof.

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