Roof Boards Wet

Not wet but some areas slightly damp.

Roof boards wet. And when we slit the asphalt felt and pulled it back we found roof boards that were soaking wet. 2 layers of shingles. For safety reasons it is best only to work on the roof when all surfaces are dry. A wet roof deck is also a slippery deck.

Attic insulation combination of fiberglass covered by cellulose. Moisture trapped inside of insulation is a breeding ground for mold and bacteria. Wear soft soled shoes and follow all common safety practices when working on the roof. Wet insulation means trapped moisture that will slowly degrade the entire roofing system from the decking to the building itself.

Evidently the source of the dripping water was not a roof leak but condensation of interior moisture under the vapor impermeable tri flex underlayment. Trapped moisture encourages corrosion of roofing fasteners and rusting of steel studs and wall ties which reduce wind uplift ratings. It s a problem that demands immediate attention and there are no quick fixes. The asphalt felt paper under the tri flex left in place during the most recent reroof was wet.

Rotted boards are the result of moisture reaching the wood. Inner plywood of roof wet. Wanted to add more cellulose but installer said it would make wet roof worse. It is never a good idea to install a roof over wet plywood or any type of roof sheathing.

Trapped water will boil when the sun heats the roof and the shingles will then have small pits where the. Plywood is original 49 years old.