A staple in a wide range of construction projects, OSB board is used for everything for sheeting through to structural sheathing and more. A good alternative to ply-wood and usually cheaper, we stock OSB3 board in a selection of sizes. Dimensions include: OSB board 18mm; OSB board 11mm. Sterling board is resistant to water, with the OSB3 option being particularly suitable for humid conditions. We have the right sized OSB3 board for almost every job. If you're looking for OSB board for roofing, or for most other purposes, we've got what you need at discount price, ready for fast dispatch across the UK. Remember we offer our lowest price, so you'll never lose out by using us for your roofing supplies.