Mold On Roof Sheeting

Increasingly homeowners in the pacific northwest are noticing mold on the underside of their roof sheathing.

Mold on roof sheeting.

He believes that poor ventilation was to blame and that by installing a ridge vent would prevent any. Mold growth on attic roof sheathing is a common issue in cool climates such as the pacific northwest. Use a long handled brush to scour the surface of the shingles and loosen stuck on. Spraying the roof 1.

One puzzling aspect of the phenomenon is that the mold is found in well built homes that comply with all relevant building codes. Attic spaces are one of the most common places in a home for mold to be found growing. Appears due to this incorrect installation mold is forming on the underside of the roof sheathing. This occurs when the temperature of the sheathing drops below the dew point creating a thin layer of moisture on the substrate.

The inspector noted that the mold wasn t on the rafters. And it seemed to be localized to one side of the sheathing not the other. If your state doesn t allow you to take a sample to send to a lab recommend testing by a certified mold assessor. 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.

A 10 x 10 area of plywood has been removed to provide air into this area. The black mold is on the first 3 truss panels. At the south end of the roof the ridge changes direction causing an overlay condition. So a house that we are in contract to buy just came back with mold in the attic sheathing of the roof.

The mold itself may have a cottony texture but can also be velvety leathery or. Mold that grows on the underside of roof sheathing due to ideal mold growth conditions being present. Spray the entire roof thoroughly. Skips a few trusses and reappears on the next panel or two.

Scrub away the thickest buildup. This phenomenon occurs in vented attics and is more common in new homes than old homes. Mold on the underside of roof sheathing is also very common. Attic insulation incorrectly installed and blocking soffit vents on north side of home.

Mix up your cleaning solution. In the vast majority of cases the mold growth is caused by condensation.