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OSB Board Frequently Asked Questions

What Is Oriented Strand Board (OSB)?

Oriented Strand Board is an engineered, composite wood-based panel product that is made from thin wood strands. More than 50 layers of thin strands are used to make one sheet of OSB. The OSB panels are often used as roofing materials.

OSB boardHow OSB is made?

OSB is manufactured from wood that is cut from trees such as aspen poplar, mixed hardwood and southern yellow pine that grow quickly and sustainably. The wood is cut into strands and dried. The pieces are then organised and cured with wax and binders. To make an OSB board, the strands are grouped with more sheets before they are pressurised at extremely high temperature. The OSB is made in a variety of sizes but often range from a quarter-inch up to three-quarters of an inch. Moreover, customers can get special sizes upon request.

The Benefits of OSB

OSB is more squared with smaller dimensional tolerances hence perfect for roofing. Moreover, it can be made into panels of 8′ x 24′, which is significantly larger as compared to other panels. The OSB board is generally made from home-grown trees to reduce the demand for old grown timber. This means that unlike other products such as steel and other building materials that require a large amount of energy and resources to produce, it is eco-friendly. It is also consistently stiff, an attribute missing in plywood and other wood products.

Is OSB Waterproof?

The pieces of strands used to make OSB are saturated with resins that are made to offer superior waterproofing properties for a complete OSB panel.

OSB vs Plywood

Both OSB and Plywood come with equal stability and strength even though it features more sheets of wood glued and pressed together. When it comes to the cost, the OSB is cheaper than Plywood.

Both OSB and Plywood are used for sheathing roofs, subfloors and walls. They are easy to drill into and have equal ability to hold in nails. The OSB panels, however, are less resistant to water. As such, most people prefer Plywood for roofing.

OSB is eco-friendly since it requires smaller trees such as Poplar that grow quickly hence sustainable. Conversely, Plywood requires larger trees from old-grown forests thus not environmentally sustainable.


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