Osb Vs Cdx Plywood For Roof

Osb does not do well when it gets wet.

Osb vs cdx plywood for roof.

Oriented strand board osb combines wood chips glue and resin into the shape of a sheet of plywood and bakes them together. The result is a wooden sheet that is. Both cdx plywood and osb tend to come in standard sheets of four foot by eight foot 4 8. Far too often i see osb sag between the trusses making your roof look wavy.

When you are boarding up for a big storm you should be using at minimum 1 2 cdx plywood. Cdx is veneer plywood. Osb on the other hand stands for oriented strand board which is a cheaper version of cdx. Because of its construction some manufacturers actually make larger sheets of osb.

Cdx plywood is produced by gluing together sheets of veneer with each layer being glued the opposite grain to the one below it. Major differences between osb and cdx. How do cdx and osb differ in performance. 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.

It is often less expensive than cdx plywood because this manufacturing process doesn t require the same costly veneers found on the front and back of cdx plywood. Although osb typically offers a higher shear rating which adds rigidity to your structure. Although osb typically offers a higher shear rating which adds rigidity to your structure. Now let s have a look at some of the main differences between cdx and osb as roofing plywood.

Osb is a cheap imitation of cdx. The roof deck is the surface underneath your roof and roofing underlayment. 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.

My personal opinion is that osb performs well on the wall and floor but stick to cdx plywood on the roof. My personal opinion is that osb performs well on the wall and floor but stick to cdx plywood on the roof. One of the major differences between osb and cdx plywood is how well each holds up against water. My go to option for cabinets boxes and work tables surfaces is 3 4 birch plywood.

Far too often i see osb sag between the trusses making your roof look wavy. 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. However you might find that osb can better suit your needs than plywood for the roof.

Differences between osb and cdx for roofing plywood. It is made of wood chips resin and glue cast and baked together to produce a cdx like sheet. The letters c and d represent the grades of either side of the plywood while x stands for exposure.