Mold On Roof Rafters

Fourth the residual mold staining is treated with an encapsulant.

Mold on roof rafters.

Mold growth on attic roof sheathing is a common issue in cool climates such as the pacific northwest. Skips a few trusses and reappears on the next panel or two. There s an underlying moisture issue that needs to be resolved because mold requires moisture to grow and spread. At the south end of the roof the ridge changes direction causing an overlay condition.

Attic mold is often caused by warm moist air from the house leaking into the attic space. The roof has baffles at alternating thusses soffit and ridge vents. If the insulation has been affected by the mold remove it in thick trash bags and replace it with new insulation after you complete your mold remediation. And eventually cause wood rot and reducing the life of your roof.

Mold problems are indications of water problems. Cleaning mold from irregular or hard to reach wood surfaces media blasting. Third the attic is dried out either using natural air flow or mechanical heating and dehumidification. Mold requires two things to grow.

This occurs when the temperature of the sheathing drops below the dew point creating a thin layer of moisture on the substrate. The black mold is on the first 3 truss panels. If mold needs to be removed from a roof deck through which roofing nails penetrate hand wiping is not feasible. Power cleaning using spray equipment such as media blasting using baking soda or dry ice is very effective for these surfaces.

Attic mold left unchecked can grow and lead to structural deterioration of attic sheathing and roof structural elements. Most mold professionals are not licensed to perform roof repair. This causes condensation to form on the cold surfaces in the attic especially roof rafters sheathing and trusses. Re roofing with lining lining papers sarking roofing felt can cause severe mold growth and rot due to reduced ventilation.

A 10 x 10 area of plywood has been removed to provide air into this area. Water leaks and poor ventilation leading to condensation are the main roof defects which give rise to a variety of fungi moulds and insect attacks. Examine the insulation along your rafters. Water and mold problems in the attic can deteriorate wood in the roof sheathing joists etc.

In the vast majority of cases the mold growth is caused by condensation. Perhaps you use it for storage. At some point you will probably need to go to your attic for something.