Green Mold On Underside Of Roof Sheathing

Mold that grows on the underside of roof sheathing due to ideal mold growth conditions being present.

Green mold on underside of roof sheathing.

This latter phenomenon occurs when the house is too humid and the warm moist air seeps into the attic where it condenses and freezes on cold attic areas. This occurs when the temperature of the sheathing drops below the dew point creating a thin layer of moisture on the substrate. Below is a typical roof leak. Condensation determining the cause of attic mold.

Generally tearing off a roof and roof sheathing and perhaps roof framing to remove mold would not be sensible nor cost justified. The mold itself may have a cottony texture but can also be velvety. The mold growth and sheathing damage is limited to a small area. Why mold grows mold usually causes a musty odor and may cause staining that may be black brown gray white yellow or green.

White and green fuzzy growth on osb sheathing. One puzzling aspect of the phenomenon is that the mold is found in well built homes that comply with all relevant building codes. After several years of this there may be. In the vast majority of cases the mold growth is caused by condensation.

Mold on attic sheathing mold growth on attic roof sheathing is a common issue in cool climates such as the pacific northwest. Condensation occurring on the underside of plastic in the attic. 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. Increasingly homeowners in the pacific northwest are noticing mold on the underside of their roof sheathing.

But these would still only affect a small area. There s an underlying moisture issue that needs to be resolved because mold requires moisture to grow and spread. Attic mold left unchecked can grow and lead to structural deterioration of attic sheathing and roof structural elements. This phenomenon occurs in vented attics and is more common in new homes than old homes.

Mold growth provided it is not just cosmetic mold which can simply be left alone can be cleaned from wood surfaces by blasting scrubbing or even simple surface wiping depending on the surface accessibility and.