OSB 0.9 cm. (122x244 cm). Class 2.
OSB 1.8 cm. (59x244 cm.) Knife & Groove. Class 2.
OSB is widely used in timber frame construction. The very strong construction board is very suitable for indoor use (e.g. floors and walls). Possibly also indoor paneling in summerhouses/log cabins. Not suitable for outdoor use. The board has a tongue & groove connection all around.