Roof Boards Damp

Roof cuts and thermographic imaging can also detect moisture in addition to other strategies.

Roof boards damp.

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. It is never a good idea to install a roof over wet plywood or any type of roof sheathing. In the vast majority of cases the mold growth is caused by condensation. Another leading cause of condensation in roofs is the use of wood burner cookers.

Look for damp spots on the underside of your roof. Follow the water uphill till the wood is no longer wet. This occurs when the temperature of the sheathing drops below the dew point creating a thin layer of moisture on the substrate. Such cookers often allow for the quick rise of moist air leaving behind the cold air.

On structural concrete and possibly wood planks or plywood moisture drips may not be observed. When this warm air reaches the spaces in the roofs it gets in contact with cold air and condenses. 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. Also look for a thin stream of water flowing down one of the rafters.

Trapped water will boil when the sun heats the roof and the shingles will then have small pits where the.