Mold In Roof Attic

Heating ventilation and air conditioning ducts may also.

Mold in roof attic.

Wooden beams and plywood may be affected and it can be difficult to remove all traces of mold from wooden surfaces. In the vast majority of cases the mold growth is caused by condensation. Insulation is often affected. The chief cause of attic mold is poor ventilation.

Attic mold left unchecked can grow and lead to structural deterioration of attic sheathing and roof structural elements. Mold growth on attic roof sheathing is a common issue in cool climates such as the pacific northwest. There s an underlying moisture issue that needs to be resolved because mold requires moisture to grow and spread. On attic mold visible on pine tongue and groove roof sheathing near the building eaves.

This occurs efficiently in attics with proper ventilation but attic mold can occur if the hot air meets the cold surface of the attic roof and creates condensation. This occurs when the temperature of the sheathing drops below the dew point creating a thin layer of moisture on the substrate. The photo at the left was identified as a toxic mold that probably should be removed although the ease of movement generally tearing off a roof and roof sheathing and perhaps roof framing to remove mold would not be sensible nor cost justified. Particularly in cold climates when homeowners heat their homes in winter hot air tends to escape through the attic.

Click photo for larger image.