Green Mold On Underside Of Roof Sheathing

Attic mold left unchecked can grow and lead to structural deterioration of attic sheathing and roof structural elements.

Green mold on underside of roof sheathing.

Why mold grows mold usually causes a musty odor and may cause staining that may be black brown gray white yellow or green. Condensation occurring on the underside of plastic in the attic. Best procedures for cleaning mold contaminated wood. There s an underlying moisture issue that needs to be resolved because mold requires moisture to grow and spread.

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. But these would still only affect a small area. One puzzling aspect of the phenomenon is that the mold is found in well built homes that comply with all relevant building codes. Condensation determining the cause of attic mold.

Mold on attic sheathing mold growth on attic roof sheathing is a common issue in cool climates such as the pacific northwest. 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 phenomenon occurs in vented attics and is more common in new homes than old homes. 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.

White and green fuzzy growth on osb sheathing. Increasingly homeowners in the pacific northwest are noticing mold on the underside of their roof sheathing. The mold growth and sheathing damage is limited to a small area. This occurs when the temperature of the sheathing drops below the dew point creating a thin layer of moisture on the substrate.

Generally tearing off a roof and roof sheathing and perhaps roof framing to remove mold would not be sensible nor cost justified. Mold on the underside of roof sheathing is also very common. In the vast majority of cases the mold growth is caused by condensation. Mold that grows on the underside of roof sheathing due to ideal mold growth conditions being present.

Below is a typical roof leak.