Osb Roofing Problem

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Osb roofing problem.

Despite its common use as such we don t recommend using osb for subfloors but that s really just for aesthetic reasons. The problem though is that osb tends to deteriorate fairly rapidly if exposed to moisture losing fastener pull out resistance. Roof leaks of course but also improper attic ventilation can cause condensation in the roof deck that can cause the osb to weaken. As i described in the story of painters refusing to paint insulated homes building.

So what would expose it to moisture. Part of the problem of course is the perrenial confusion between correlation and causality. Unlike other materials an osb has a squarer and smaller dimension. This makes the material perfect for roofing and other types of use.

Foil backed osb is applied mostly in attics. But peel and stick doesn t usually need to be removed. You can use an osb as a subfloor for sheathing roof decking and more. Oriented strand board osb gets blamed for a lot of problems that are really the fault of the designers and builders.

The goal of a foil backed osb is to cool the air within the top layer of insulation in the attic or wall by emitting the radiant heat absorbed through the roof or exterior walls which reduces the delta t and lessens the overall energy use in a building. Oriented strand board isn t plywood nor is it a type of particleboard fiberboard or wafer board and although it is a newcomer to a plywood. In the case of a subfloor deformations left in the osb after it dries can lead to wavy flooring. The screened surface also provides a little more.

New homes will usually see a few rainfalls before a roof is on and as noted above osb doesn t handle moisture well. This means that the removal process will likely damage the osb roof decking so in most cases if you do have to remove peel and stick it is preferable to remove the osb decking and replace that as well. For pricing and availability. Not just that but most an osb is manufactured in different sizes.

7 16 cat osb sheathing application as 2 x 4. Osb hit the market as we really started getting serious about insulation and air sealing. Osb sheathing 15 32 cat ps2 10 osb sheathing application as 4 x 8. You can have an osb that s larger than your plywood.

For pricing and availability. 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. I m halfway though sheeting the roof of my shipping container shop and already need to redo some of it. However it is also used in wall systems.