Osb Vs Cdx Plywood For Roof

Going back to the x in cdx you may recall that it means exposure.

Osb vs cdx plywood for roof.

One of the major differences between osb and cdx plywood is how well each holds up against water. When you are boarding up for a big storm you should be using at minimum 1 2 cdx plywood. My personal opinion is that osb performs well on the wall and floor but stick to cdx plywood on the roof. Osb does not do well when it gets wet.

Differences between osb and cdx for roofing plywood. Over the years i have seen claims for plywood decking delaminating which can cause squeeks and knocks between the ply s. The result is a wooden sheet that is. My personal opinion is that osb performs well on the wall and floor but stick to cdx plywood on the roof.

It is made of wood chips and glue. This means that osd is the perfect choice for applications such as exterior wall sheathing and roofing. Although osb typically offers a higher shear rating which adds rigidity to your structure. Far too often i see osb sag between the trusses making your roof look wavy.

Far too often i see osb sag between the trusses making your roof look wavy. How do cdx and osb differ in performance. It is made of multiple layers of thinly cut solid sheets of wood that are pressed together. It is usually made of 4 by 8 sheets that should be 1 2 thick.

Now let s have a look at some of the main differences between cdx and osb as roofing plywood. Osb on the other hand stands for oriented strand board which is a cheaper version of cdx. Osb and plywood offer similar and sufficient performance in terms of strength and functionality though plywood is about 7 stronger the main difference between the two is how they handle moisture and oddly enough there are wildly varying conclusions from very reputable sources as to just how vapour permeable they are. Both cdx plywood and osb tend to come in standard sheets of four foot by eight foot 4 8.

Because of its construction some manufacturers actually make larger sheets of osb. Osb does not provide adequate protection against fast moving storm debris. Osb is a cheap imitation of cdx. Although osb typically offers a higher shear rating which adds rigidity to your structure.

Major differences between osb and cdx. The letters c and d represent the grades of either side of the plywood while x stands for exposure. Cdx plywood is produced by gluing together sheets of veneer with each layer being glued the opposite grain to the one below it. However you might find that osb can better suit your needs than plywood for the roof.

It is made of wood chips resin and glue cast and baked together to produce a cdx like sheet. The roof deck is the surface underneath your roof and roofing underlayment. Cdx is veneer plywood.