Osb Vs Cdx Plywood For Roof

Because of its construction some manufacturers actually make larger sheets of osb.

Osb vs cdx plywood for roof.

My personal opinion is that osb performs well on the wall and floor but stick to cdx plywood on the roof. Major differences between osb and cdx. Osb is a cheap imitation of cdx. The roof deck is the surface underneath your roof and roofing underlayment.

It is usually made of 4 by 8 sheets that should be 1 2 thick. Although osb typically offers a higher shear rating which adds rigidity to your structure. Oriented strand board osb combines wood chips glue and resin into the shape of a sheet of plywood and bakes them together. Both cdx plywood and osb tend to come in standard sheets of four foot by eight foot 4 8.

The result is a wooden sheet that is. Cdx plywood is produced by gluing together sheets of veneer with each layer being glued the opposite grain to the one below it. When you are boarding up for a big storm you should be using at minimum 1 2 cdx plywood. However you might find that osb can better suit your needs than plywood for the roof.

How do cdx and osb differ in performance. Over the years i have seen claims for plywood decking delaminating which can cause squeeks and knocks between the ply s. Now let s have a look at some of the main differences between cdx and osb as roofing plywood. Although osb typically offers a higher shear rating which adds rigidity to your structure.

Osb does not do well when it gets wet. It is made of wood chips resin and glue cast and baked together to produce a cdx like sheet. It is made of multiple layers of thinly cut solid sheets of wood that are pressed together. My go to option for cabinets boxes and work tables surfaces is 3 4 birch plywood.

Osb does not provide adequate protection against fast moving storm debris. One of the major differences between osb and cdx plywood is how well each holds up against water. Cdx is veneer plywood. This means that osd is the perfect choice for applications such as exterior wall sheathing and roofing.

It is made of wood chips and glue. Going back to the x in cdx you may recall that it means exposure. The letters c and d represent the grades of either side of the plywood while x stands for exposure. Differences between osb and cdx for roofing plywood.

Far too often i see osb sag between the trusses making your roof look wavy. Osb on the other hand stands for oriented strand board which is a cheaper version of cdx. My personal opinion is that osb performs well on the wall and floor but stick to cdx plywood on the roof.