Mold On Roof Sheathing

This phenomenon occurs in vented attics and is more common in new homes than old homes.

Mold on roof sheathing.

After several years of this there may be dark rings around protruding roofing nails and larger dark spots or areas on the roof sheathing and or exterior gable walls. Because wood is porous it may be difficult to remove the mold stains from sheathing but you can kill the mold by cleaning the sheathing with bleach and water. 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. And it seemed to be localized to one side of the sheathing not the other.

In the vast majority of cases the mold growth is caused by condensation. The inspector noted that the mold wasn t on the rafters. Another common concern with mold in the home is exposure to airborne mold spores. Mold is a fungus that grows in the form of multicellular filaments called hyphae.

He believes that poor ventilation was to blame and that by installing a ridge vent would prevent any. Mold that grows on the underside of roof sheathing due to ideal mold growth conditions being present. Mold growth on attic roof sheathing is a common issue in cool climates such as the pacific northwest. Where do you go from here.

Combine 1 2 cup chlorine bleach with. This condition may be consistent with the effects of night sky radiation. If you don t find the source of the moisture in your attic and fix the problem it will only get worse. 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.

Mold on the underside of roof sheathing is also very common. There is some staining discoloration and or mold or mold like fungal growth present on the roof sheathing in the attic. This occurs when the temperature of the sheathing drops below the dew point creating a thin layer of moisture on the substrate. Mold can weaken structural elements of your home like the rafters and roof sheathing.

Mold can form but often it is. One puzzling aspect of the phenomenon is that the mold is found in well built homes that comply with all relevant building codes. So a house that we are in contract to buy just came back with mold in the attic sheathing of the roof. It s covering the rafters and the roof sheathing and there s even some stuff on the insulation.