Wet Sheathing In Attic

Moisture or frost on the roofs sheathing.

Wet sheathing in attic.

This occurs when the temperature of the sheathing drops below the dew point creating a thin layer of moisture on the substrate. It is never a good idea to install a roof over wet plywood or any type of roof sheathing. There are many signs that an attic is wet. Mold growth on attic roof sheathing is a common issue in cool climates such as the pacific northwest.

Trapped water will boil when the sun heats the roof and the shingles will then have small pits where. Often this is first noticed when re shingling. Prolonged wetness will rot out the roof sheathing. Water or drip marks scattered on the attic floor.

These signs can vary contingent on the catalyst of the problem and are generally worse on north facing or shady sides of roofs. Water leaks are more obvious as telltale signs such as darkened water stains evidence of mold on the ceiling inside the house or wet sheathing. If you have ceiling leaks only in the spring it may be that ice has been forming on the sheathing all winter and it suddenly melts when a warm spell arrives. How does condensation get in the attic.

Mold on attic sheathing. What to do about a wet attic. Installation tips osb roof sheathing the ol sage builder trubord. In the vast majority of cases the mold growth is caused by condensation.

Moist or wet insulation. Wet sheathing was found in attic area due to lack of venting.