Mildew Attic Sheathing

Attic ventilation is important but controlling the leakage of home moisture into the attic is more important.

Mildew attic sheathing.

Mold growing on the sheathing in your attic is a serious problem that shouldn t be ignored. At first i though it was burned but i think it s mold or mildew but why only the north side. Soffitt vent in front of house blocked by insulation no. Mold growth on attic roof sheathing is a common issue in cool climates such as the pacific northwest.

The presence of mold inside your home even if it s in an unused place such as the attic can cause. Mildew grows in a thin black or whitish layer on a variety of materials in your attic. This occurs when the temperature of the sheathing drops below the dew point creating a thin layer of moisture on the substrate. In the vast majority of cases the mold growth is caused by condensation.

This makes it especially easy to spot. Pulldown attic stairs no insulation whole house fan no insulation cover bathroom fan duct terminates in the soffit venting ventilation issues. I have very dark sheathing in my attic but it s only the plywood on one side. If there is mold growing on most of the attic sheathing and the attic is well ventilated you must find and eliminate the sources of moisture.