Mold On Roof Rafters

Re roofing with lining lining papers sarking roofing felt can cause severe mold growth and rot due to reduced ventilation.

Mold on roof rafters.

Moisture in your attic typically comes from leaks or condensation. The roof has baffles at alternating thusses soffit and ridge vents. Attic mold is often caused by warm moist air from the house leaking into the attic space. Mold growth on attic roof sheathing is a common issue in cool climates such as the pacific northwest.

The black mold is on the first 3 truss panels. Attic mold left unchecked can grow and lead to structural deterioration of attic sheathing and roof structural elements. At the south end of the roof the ridge changes direction causing an overlay condition. In the vast majority of cases the mold growth is caused by condensation.

Cleaning mold from irregular or hard to reach wood surfaces media blasting. If mold needs to be removed from a roof deck through which roofing nails penetrate hand wiping is not feasible. Perhaps you use it for storage. 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.

A 10 x 10 area of plywood has been removed to provide air into this area. And eventually cause wood rot and reducing the life of your roof. Fourth the residual mold staining is treated with an encapsulant. This causes condensation to form on the cold surfaces in the attic especially roof rafters sheathing and trusses.

At some point you will probably need to go to your attic for something. Mold requires two things to grow. Examine the insulation along your rafters. 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.

Third the attic is dried out either using natural air flow or mechanical heating and dehumidification. Water and mold problems in the attic can deteriorate wood in the roof sheathing joists etc. The nutrients are usually organic materials such as dust dirt and the. Power cleaning using spray equipment such as media blasting using baking soda or dry ice is very effective for these surfaces.

This occurs when the temperature of the sheathing drops below the dew point creating a thin layer of moisture on the substrate. Most mold professionals are not licensed to perform roof repair. Skips a few trusses and reappears on the next panel or two.