What is stronger OSB board or plywood?

Osb is stronger than plywood in shear. Shear values, through its thickness, are about 2 times greater than plywood. This is one of the reasons osb is used for webs of wooden I-joists.

What does OSB stand for and why is it stronger than plywood?

Plywood long ago lost its market leadership to oriented strand board (OSB), which is now the most-used sheathing and subflooring material. Estimates put its market share as high as 75\%, with much of that dominance thanks to cost-conscious production builders.

Does OSB hold screws as well as plywood?

Plywood and OSB: Screw withdrawal or holding ability. Group 1 plywood, made from the strongest species of wood such as Southern Yellow Pine, holds screws better than OSB.

How much weight can a sheet of OSB hold?

3/8 OSB, 24/0 APA span rating, 30 psf allowable live load. 7/16 OSB, 24/16 APA span rating, 40 psf allowable live load. 15/32 OSB, 32/16 APA span rating, 70 psf allowable live load.

Is OSB good for subfloor?

Some builders prefer OSB over plywood for flooring because the surface, when new, is always clean, flat, and knot-free. Since OSB is so dense, it’s a good soundproofing product. OSB is a more consistent product than plywood or other types of material for subfloor: every sheet is the same.

Is OSB suitable for outdoor use?

OSB is highly resistant to moisture and can be water and weatherproofed for exterior use using good quality paint or stain. It has superior strength to other wood panels and a slower rate of moisture absorption. Properly maintained and protected, OSB will last for decades.

What side of OSB goes up?

OSB roof panels should always be installed with the grade stamp facing into the attic and the screened surface (with the nail guide lines) facing up.

Can you use OSB for attic flooring?

If your attic joists won’t bear the weight necessary to finish out a living space but the engineer cleared them to support floor decking for light storage, you can install ½-inch plywood or oriented strand board (OSB) in 4-foot-by-8-foot panels over existing 16-inch OC joists.