£24.00 18mm OSB3 Sheet quantity Add to basket Categories: Sheet Materials, Timber Additional information Additional information Dimensions 120 × 240 × 1.8 cm Related products 25mm X 50mm Treated Roof Batten £5.94 Select options 50mm X 100mm Sawn Treated Timber £6.84 – £13.68 Select options 50mm X 50mm Sawn Treated Timber £3.93 Select options 50mm X 75mm Sawn Treated Timber £5.94 – £11.88 Select options