Was on a job today where 22mm Chipboard has been laid over 230mm joists spaced roughly at 400mm centres. Due to the house being out of square etc a lot of the joists near the walls are a few inches away and hence a lot of the chipboard joins are not supported and join between two joists as the floor panels have started against the wall and thus thrown out the spacing. Is this OK as I thought all end joints should meet over a joist? If so what are the options? Noggin out and add supports in 4x2 on all unsupported joins? Cheers in advance.