Online Catalogue:Timber, Doors and Sheet Materials:Sheet Materials:Plywood - WBP, Sheathing, OSB, Blockboard
TIP : Careful, there are cheaper alternatives on the market, often Brazillian production, the quality of the face is not as good.
does not conform to BS 5268 part 2
Note the OSB 3 is for use on flat roof situtaions, a far better product than standard chipboard.