I am needing to raise my hallway and 2 room floors to match my kitchen that has been tiled. There was already a difference but I need to raise in total 4cm. 15mm will be my underlay and laminates but the remaining 25mm I would need to use either plywood or OSB.
I was wondering is there any recommendation on which one to use or not to use or if I should mix - i.e. do 18mm of OSB then 6mm of plywood, or something similar?
