Osb Roof Sheathing Got Wet

Osb s other moisture challenge has to do with dimensional stability in other words osb can irreversibly swell especially at the edges when it gets too wet. Most of the time there is very little harm and the material doesn t loose strength or any of its integrity. Here are the four main ways you get wet framing lumber to dry.

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Osb roof sheathing got wet.

Use a dehumidifier 4. Under the best circumstances the osb sheathing is delivered to the site installed and covered within a few days. Although plywood is usually more expensive than osb plywood is more resistant to moisture damage. 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. Allowing osb to get wet is not a wonderful idea but its done all the time. If the osb swelling is too serious more than your belt sander can fix install a layer of tongue and groove plywood over the ruined osb. 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.

Once the house is dried in and the osb has dried out use a belt sander to take down the swollen edges of the osb. It is never a good idea to install a roof over wet plywood or any type of roof sheathing. This is not a decay issue but swelling can cause other difficulties in construction.