Osb Siding Problems

The most common failure is the appearance of a warp bow or buckle in the sheathing used for exterior walls.

Osb siding problems.

Why osb grade t 1 11 siding fails the problem with t1 11 siding however is not with its cost functionality or even the aesthetics. We frame with 2x6 studs 24 o c. Wood chip siding has been around for many years but in the late 80 s and early 90 s a certain type of osb oriented strand board siding really became popular around salem oregon and the pacific northwest. As with most construction failures there is no single smoking gun problem and no silver bullet solution.

And cover them with 7 16 osb and then half inch dow blue foam board. See how osb has decayed from prolonged contact with ground to same point as regular timber my point here is that osb will rot when exposed to high levels of moisture but just the same as any other timber or plywood. The osb is nailed on correctly but is bowing out from the house between studs a good 4 5 inches. With some understanding of the physical properties of osb we can determine the most likely cause.

Osb s lower quality means that it becomes very vulnerable to moisture. Wood siding will expand and contract in changing weather conditions and when installed tightly no room is allowed for these patterns causing the buckling. This is not the case nearly as much with the plywood version of t1 11. The 7 16 osb sheathing on the sides of the house is buckling so badly it had caused the vinyl siding to unzip itself.

Over time delamination edge checking and buckling are likely to happen as the glue slowly gives up.