How Thick Should Loft Flooring Be?
How Thick Should Loft Flooring Be? You need 3/4-inch plywood. The thinner plywood is acceptable when the joist spacing is 16 inches. If you plan to finish the floor in the attic and turn the room into a living space, however, you should always use 3/4-inch plywood. Is 18mm chipboard OK for loft flooring? 18mm