OSB-3 or three-ply: which to use
Both are large-format structural panels, but they meet different needs and mixing them up is costly.
OSB-3 pine panel
OSB-3 is made of oriented strands pressed with moisture-resistant resins. Under the European standard, grade 3 means structural use in humid conditions: it is the panel for sheathing, roofs, mezzanines, drywall partitions and floor bases. It carries loads well and takes screws directly, although its face has a very distinctive look that you either embrace or cover.
Three-ply spruce panel
Three-ply is made of three layers of solid timber glued with the grain crossed, which gives it great dimensional stability and a much cleaner face. It is the usual panel for reusable formwork, workbenches, shelving and furniture where the timber stays visible without veneering.
Format and handling
OSB-3 comes in 1250x2500 mm and three-ply in 1250x2100 mm, formats that optimise cutting but are heavy and awkward to move on your own. If you are handling several panels, a panel carrier saves a lot of effort and stops the edges getting knocked.
Always store them flat and on supports: stood upright against a wall, they end up bowing.
Not sure which panel suits your project? Write to us and we will advise you.
