Underside Of Roof Sheathing Is Wet

Those often are the underside of the roof.

Underside of roof sheathing is wet.

The osb and in fact any wood panels must be allowed to dry completely depending on how wet the panels are this could be a few days before any roofing material is applied to avoid trapping moisture under the roof material that could cause edge swell and buckling. In the vast majority of cases the mold growth is caused by condensation. 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. The sheathing at the peak of the roof was saturated with moisture.

There were also several issues with the intersection of the roofs where the 2 apartments meet. Does mold on attic sheathing have to be removed. When moisture condenses on plywood roof sheathing repeatedly or continuously the wood will turn black. Mold on attic sheathing.

This occurs when the temperature of the sheathing drops below the dew point creating a thin layer of moisture on the substrate. Mold growth on attic roof sheathing is a common issue in cool climates such as the pacific northwest. When this phenomenon occurs the sheathing or framing may become slightly wet on the surface. On going back inside the attic the frost had melted and the underside of the sheathing was wet not so much that it was dripping but enough that it was damp.

The presence of mold inside your home even if it. Mold growing on the sheathing in your attic is a serious problem that shouldn t be ignored. The following picture is of a long standing moisture condition in an attic where much of the roof sheathing has turned black. This can be caused by the action of fungal growth and molds and the affect they have on the tannins in the wood.

Installation tips osb roof sheathing the ol sage builder trubord. Trapped water will boil when the sun heats the roof and the shingles will then have small pits where. It is never a good idea to install a roof over wet plywood or any type of roof sheathing.