Expol Under Floor Insulation is the way to insulate your home to stop heat entering in summer and escaping in winter. The polystyrene insulation panels are placed snugly between your floor joists. A 20mm air gap provided by ribs on the insulation panels ensure your home is protected from the extreme temperatures under your floor. Enjoy warmer feet and save around 12% on your heating bill. Underfloor insulation is great for all homes especially pole houses and all exposed wooden floors.