Roof Boards Damp

When this warm air reaches the spaces in the roofs it gets in contact with cold air and condenses. 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. This occurs when the temperature of the sheathing drops below the dew point creating a thin layer of moisture on the substrate.

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Mold growth on attic roof sheathing is a common issue in cool climates such as the pacific northwest.

Roof boards damp.

Cracking noises can sometimes be heard when walking on the roof during wintertime as a thin layer of ice breaks he adds. Another leading cause of condensation in roofs is the use of wood burner cookers. Trapped water will boil when the sun heats the roof and the shingles will then have small pits where the. Roof cuts and thermographic imaging can also detect moisture in addition to other strategies.

Follow the water uphill till the wood is no longer wet. Also look for a thin stream of water flowing down one of the rafters. Look for damp spots on the underside of your roof. On structural concrete and possibly wood planks or plywood moisture drips may not be observed.

Such cookers often allow for the quick rise of moist air leaving behind the cold air. This leads to the formation of damp spots on the surface of the roof. Look for potential entry points like roof vents valleys loose nails and mark the area with chalk so you can examine the exterior of your roof after it quits raining. In the vast majority of cases the mold growth is caused by condensation.

It is never a good idea to install a roof over wet plywood or any type of roof sheathing.

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