I'm trying to lay an new t&g oak plank floor on old existing joists. In all the web sites they suggest that the joists should be a minimum of 300mm centres for best results. My joists are 450mm centres - is this going to be a problem?
Also if the but joint at the end of the plank lands between the joists, what is the best way to support the join?
I would be gratefull for any information anyone can give,