What are the different grades of OSB?

What are the different grades of OSB?

OSB/1 – General-purpose boards and boards for interior fitments (including furniture) for use in dry conditions. OSB/2 – Load-bearing boards for use in dry conditions. OSB/3 – Load-bearing boards for use in humid conditions. OSB/4 – Heavy-duty load-bearing boards for use in humid conditions.

How is OSB rated?

Panels manufactured under the performance standards are rated for three end uses: sheath- ing for floors, walls, and roofs (APA Rated Sheathing); single-layer flooring (APA Rated Sturd-I-Floor®); and exterior siding (APA Rated Siding).

What does APA rated OSB mean?

APA Rated Sheathing is rated for use as subfloor, wall, roof, diaphragm and shear wall sheathing. It is suitable for use in a range of construction and miscellaneous applications where strength and stiffness are required. 2.1 Adhesive Bond Classification.

What is OSB grade3?

This oriented strand board (or “sterling board”) is a wood structural panel similar to plywood. These grade 3 OSB boards are precision-engineered load-bearing structural boards well suited for fencing, sheds, wall sheathing, roof decking and other construction jobs in dry conditions.

What is exterior grade OSB?

Exterior rated sheathings have a fully waterproof bond and are designed for applications subject to exposure to the weather or to moisture for its entire service life. SIPs are not to be used in applications where they will be used for permanent exposure to the weather.

What does PS2 10 mean?

Coastal produces Performance Rated Sheathing panels as defined in US Product Standard PS2-10 for Construction and Industrial Plywood. These panels are rated for strength properties and are not graded for their appearance since they are generally not exposed in their final use.

What is the difference between OSB 2 and 3?

OSB2 is great for structural, non-load bearing projects in dry conditions whereas OSB3 performs better for structural, load bearing use and for use in humid conditions.

What OSB 2?

The trade term OSB/2 comes from the technical class denoted in BS EN 300 for ‘load-bearing boards for use in dry conditions’. Dry in this instance meaning environments where the boards are completely protected from external weather and are not exposed to wetting.

Which is stronger OSB or particle board?

Because of the three-layer crisscross structure, OSB board is more uniform than the general particle board, has good toughness, strong nail holding power, and is not easy to expand due to moisture.