Plywood is made from wood species such as spruce, pine and fir. When manufacturing plywood, each individual adjacent layer is rotated from 45-90 degrees so the wood grain is going in different directions in each layer, which improves strength and prevents warping. This is otherwise known as cross-graining, which means the growth lines are not adjacent to the long edge of the board. This adds to the strength of the finished product and explains its enduring popularity as a building product

“How big is a sheet of plywood” is a common question we get asked, and it depends whether you mean plywood sheet thickness in mm or the dimensions in either metric or imperial. The standard dimensions are 2440mm x 1220mm or 8” x 4” respectively whereas plywood sheet thickness can vary. We stock a range of 8x4 plywood sheets, as well as 8x2 plywood sheets.Thin plywood sheets start at 5.5mm and large plywood sheets go all the way up to 25mm, depending on your requirements. We have a wide variety of different thicknesses to suit the type of job you need to do. It should be noted that Marine plywo

Our hardwood structural plywood can be used for exterior and interior applications, provided they are sealed correctly. External plywood board is a versatile material, the layers have a negligible core gap which limits the amount that can get into the plywood. It is moisture-resistant and water-resistant and is perfectly suited for structural tasks where occasional wetting may occur. We also carry marine plywood on our site which is even better suited to outdoor use. As is the case with all our materials, correct installation should be ensured in order for materials to work correctly.