Why Use OSB3 with Fibreglass Roofing?
A good deck is key to a long lasting flat roof and with a number of different decking options out there in the market, we take a look at one of the best for use with fibreglass roofing materials.
OSB stands for Oriented Strand Board and is also known as sterling board, it’s a specially engineered wood particle board that’s created by adding adhesives and then compressing layers of wood strands in specific orientations. OSB may have a rough and variegated surface with the individual strips of around 2.5 × 15 cm, lying unevenly across each other and comes in a variety of types and thicknesses.
The product tends to come in four different types, with OSB3 being the preferred choice for fibreglass roofing;
You don’t have to buy tongue and groove (T&G) but if you can they hold a number of advantages over the square edged version that will save you both time and money. The main features of Tongue & Groove boards in GRP roofing is they don’t need any additional fibreglass reinforcement (or bandaging) on the joints and the T&G profile will help prevent the boards from distorting as the system cures.
OSB3 has been designed specifically for demanding roofing applications including flat and pitched roofs in both cold and warm configurations along with roof cassettes and dormer windows. The boards are available to purchase in various configurations but we recommend the 18mm 8×2 board with tongue & groove profiled edges.
One side of the OSB3 board has a rough texture (usually on the side with the writing) which, unlike plywood means no surface preparation is required before use, and the board provides the perfect key for the fibreglass materials to bond to.
