One puzzling aspect of the phenomenon is that the mold is found in well built homes that comply with all relevant building codes.
Roof sheathing mold.
Mold that grows on the underside of roof sheathing due to ideal mold growth conditions being present.
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 smoothness.
The insulation was improperly installed over the soffit vents blocking air from entering 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.
Combine 1 2 cup chlorine bleach with.
Increasingly homeowners in the pacific northwest are noticing mold on the underside of their roof sheathing.
Attic spaces are one of the most common places in a home for mold to be found growing.
This occurs when the temperature of the sheathing drops below the dew point creating a thin layer of moisture on the substrate.
Mold on the underside of roof sheathing is also very common.
Generally tearing off a roof and roof sheathing and perhaps roof framing to remove mold would not be sensible nor cost justified.
A close examination of the photo above reveals large amounts of mold on the underside of the roof sheathing.
This phenomenon occurs in vented attics and is more common in new homes than old homes.
What caused the mold and why did it thrive in this attic space.