Evening lads , I am going to be plying over standard 80s-90s floorboards (6inch) . Installing on the herringbone pattern Was wondering if anyone has went down the 9mm ply route then top of with a 6mm ply for a smoother finish. Flatter the better for an herringbone install .
Do you really need to double up? If the floorboards are in decent state I'd just go with the 9mm. 12mm sheets if you really want to
Evening rugmunching , There is a few dips and run from center of lounge to toilet area. My thinking was use the 9mm to take out any sudden dips or bumps then sweeten off the whole area with the usual 6mm ply