Osb Vs Cdx Plywood For Roof

It is made of wood chips and glue.

Osb vs cdx plywood for roof.

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. Osb on the other hand stands for oriented strand board which is a cheaper version 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.

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. My personal opinion is that osb performs well on the wall and floor but stick to cdx plywood on the roof.

Now let s have a look at some of the main differences between cdx and osb as roofing plywood. Osb does not do well when it gets wet. Osb does not provide adequate protection against fast moving storm debris. 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.

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. 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.

Both cdx plywood and osb tend to come in standard sheets of four foot by eight foot 4 8. The letters c and d represent the grades of either side of the plywood while x stands for exposure. Over the years i have seen claims for plywood decking delaminating which can cause squeeks and knocks between the ply s. Osb is a cheap imitation of cdx.

My go to option for cabinets boxes and work tables surfaces is 3 4 birch plywood. Cdx is veneer plywood. How do cdx and osb differ in performance. Although osb typically offers a higher shear rating which adds rigidity to your structure.

Going back to the x in cdx you may recall that it means exposure. Major differences between osb and cdx. It is made of multiple layers of thinly cut solid sheets of wood that are pressed together. Because of its construction some manufacturers actually make larger sheets of osb.

The result is a wooden sheet that is. Far too often i see osb sag between the trusses making your roof look wavy. Differences between osb and cdx for roofing plywood.