"Profiled edges are usually matching tongue and groove and remove the need to provide support at all edges on plain boards. Boards may be profiled on all four edges or on long edges only."
The above info is quoted from the Wood Panel Industries Federation website.
Am I correct in saying that if I use boards with T&G on all 4 sides that I won't require to use extra pieces of wood between the joists to support the short edges?
This is in connection with re-roofing a garage/shed 11.1m x 3.5m which is presently covered with corrugated cement/asbestos sheets. The present joists won't line up well enough for securing the board edges without a lot of fill in pieces.I am thinking about using EPDM for a top covering as it looks reasonably straightforward for DIY. One EPDM supplier (can't remember which website now) also stated that using the T&G on all sides OSB doesn't need any additional supports but I'd rather be 100% sure before starting.