I want to insulate under my loft floor, up to building regs. From what I've read, 270mm mineral wool is sufficient, but I was wonder what options are available for rigid boards instead. I don't want it to stick above the joists, because it will be in the way of the boards.
The joists are just over 200mm high, so I was wondering what alternatives are available, up to building regs?
The joists are just over 200mm high, so I was wondering what alternatives are available, up to building regs?