Can Osb Sheathing Get Wet

Your framing lumber and the oriented strand board (OSB) are going to be fine. The glues used to make OSB are water-resistant because the manufacturers know that virtually no one can build a home that won’t get wet before the roof and siding is applied. … The OSB floors should be swept clean each day after work concludes.

Is it OK for OSB to get rained on?

Our OSB is rated “Exposure 1” and that means that it will withstand normal delays in construction. … Also, with that amount of rain, plywood and OSB may have some swelling at the edges and a thorough inspection of the panels should be done after the panels have completely dried.

Does OSB board absorb water?

The big issue with OSB board is moisture. The thickness of OSB and its ability to absorb water can cause it to swell. … However, OSB shouldn’t be seen as inferior simply because both its permeance (ability to absorb water, related to its thickness) and permeability are different to those of plywood.