Roof Sheathing Getting Wet

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

Roof sheathing getting wet.

The water repellent prevented swelling of plywood and untreated osb. Having wet sheathing covered with tarpaper or membrane will trap the water in the sheathing very bad practice and contrary to industry standardss for roofing. Although plywood is usually more expensive than osb plywood is more resistant to moisture damage. In the vast majority of cases the mold growth is caused by condensation.

Here are the four main ways you get wet framing lumber to dry. Mold on attic sheathing. If you live in an especially rainy or humid climate consider using plywood sheathing instead of osb. Trapped water will boil when the sun heats the roof and the shingles will then have small pits where the.

Mold growth on attic roof sheathing is a common issue in cool climates such as the pacific northwest. Once your house is under roof and there s little chance of the lumber getting wet you may want to do some first aid and. 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. As the other comment said with normal exterior rated plywood one wetting assuming your attic is well enough ventilated to dry the wood out in a few days is probably not going to cause much damage to the sheathing.

I used 5 8 tongue and groove nailed for the roof. What makes this product really amazing is its resistance to water. If you ve ever built or had a house built in a wet area of the country you know that traditional plywood or osb can swell when it gets wet. Use a dehumidifier 4.