Our roof used marine ply - square edged *not* T&G. And it still made noises.
I'm no expert but I wouldn't expect there to be too much movement along the joins between the ply panels if they are properly attached to the wooden joists/fillets or whatever. Isn't it more likely to occur where the joists expand and contract relative to a fixed surface such as a wall or an RSJ?
My advice (boringly!) would be to give it another year and see if it goes away as things settle down.
I certainly seem to move less as I get older.
I'm no expert but I wouldn't expect there to be too much movement along the joins between the ply panels if they are properly attached to the wooden joists/fillets or whatever. Isn't it more likely to occur where the joists expand and contract relative to a fixed surface such as a wall or an RSJ?
My advice (boringly!) would be to give it another year and see if it goes away as things settle down.
I certainly seem to move less as I get older.