Expol UnderFloor Insulation has been designed to insulate your home by being concertina cut on both sides, allowing for a compression of up to 20mm for ease of installation and to ensure a snug fit between the joists.
For those very chilly areas or just wanting the ultimate warmth through winter then you need to take a look at EXPOL R1.8 Black, both meeting and exceeding the requirements of the residential tenancy act.