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OSB boards
OSB3 structural board for flooring, roofing, sheathing and hoarding, from SMARTPLY, EGGER and Norbord. 2440 x 1220mm sheets in 9mm, 11mm and 18mm, plus 18mm tongue and groove.
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Buying guide
What OSB3 means
OSB3 is the grade of oriented strand board made for load-bearing use in humid conditions, to EN 300. It's the board to use for floors, flat and pitched roofs, timber-frame wall sheathing and site hoarding, where OSB2 would only suit dry interiors.
Choosing a thickness
9mm OSB is used for wall sheathing and hoarding, 11mm for sheathing and roof decks, and 18mm for floors and heavier roof decking. For loft floors and mezzanines, 18mm tongue and groove OSB locks together on all four edges for a firm, squeak-free floor.
Cut to size, delivered or collected
Every sheet can be cut to size before it leaves the yard: use the cut to size calculator to plan your pieces and price the cuts. Delivery is priced by postcode district from our Kings Langley yard, or collect free from 7:30am, Monday to Friday. See delivery areas and charges for details.