Moldy Plywood Under New Roof

Easily kill mold with a vinegar spray.

Moldy plywood under new roof.

Roofs are framed with rafters or trusses which are rafters joined by internal braces so they install as a single component. The minimum plywood for roofing. Treat the molded plywood. Damaged roof sheathing that may need replacement now or when re roofing moldy roof sheathing an unlikely but not impossible source of airborne problematic allergenic or other mold in the occupied space mold contaminated insulation inadequate blocked or improper under roof ventilation.

Spray the solution on the moldy plywood. Mold that grows on the underside of roof sheathing due to ideal mold growth conditions being present. 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. Move any un moldy plywood boards to a new storage area or remove the cause of the mold to prevent mold from growing on other boards.

Rafters run from the peak of the roof. You can also soak affected subflooring with a brush broom. Mold growth on attic roof sheathing is a common issue in cool climates such as the pacific northwest. Mold on the underside of roof sheathing is also very common.

For many applications a layer of plywood underneath your metal roofing is an unnecessary expense. Mold usually grows due to excess moisture in the area either in the air or on a surface. To prevent future mold growth remove the source of moisture causing it. This occurs when the temperature of the sheathing drops below the dew point creating a thin layer of moisture on the substrate.

In the vast majority of cases the mold growth is caused by condensation. Metal roofing panels rated for architectural use attached to purlins horizontal pieces of wood or metal fastened to roofing trusses are structurally sound when installed according to your roofing manufacturer s instructions and local building codes. Wait 10 minutes scrub the area and repeat the process two more times. If there is a leak in the roof plumbing or windows the mold will reappear if the water is.

Prevent future mold growth.