Oriented strand board (OSB) uses the wood from trees that grow quickly and sustainably, like aspen poplar, southern yellow pine and mixed hardwood species. The process of making OSB involves cutting the logs into strands that are then dried, organized an­d treated with wax and binders. To form panels, these strands are grouped into big sheets and pressurized at a high temperature. OSB has come into fashion as a product with the same purpose and function as plywood.

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Advantages

• Similar to plywood but more uniform and cheaper.

• Aspen and Poplar tree species are used. But can also be manufactured from fast growing species and smaller trees.

• It has more decay resistance than plywood.

• There are no soft spots as two knot holes overlap. Hence, can be nailed at the edges without worrying about them.

Disadvantages

• OSB is not water resistant and hence cannot be used for exterior projects. Unless you are using a water resistant grade OSB.