When laying T&G plywood subfloors, do all of the edges need to be supported around the perimeter of the room? If so, I may need to add some sort of blocking in my project and I'm not sure of the best approach since the walls are sitting over the joists and therefore there is nothing for the edges of the plywood to sit on.
Do I need to run board parallel to the joist with the wall on it so the entire edge of the plywood sits on top of it? I've heard that I should use "blocking" and also that it should be "continuous" but these are contradictory terms to me at the moment.
From what I've gathered, blocking would be boards inserted perpendicular to the joists and to the edge of the plywood that needs support and therefore not be "continuous". The other option would basically be sistering the joist with the wall on it which could prove difficult since there are pipes and wires in the way.
Could someone please clarify what needs to be done?