The Celotex  PL4000  is a high-performance thermal laminate insulation board range where the PIR insulation is bonded to 12.5mm tapered edge plasterboard. Perfect if you’re insulating a garage or a room where space is minimal. The polyisocyanurate rigid foam core has a thermal conductivity value of 0.022 W/m.K which gives high performance levels in various situations allowing it to achieve a BRE Green Guide A+. Both direct bonding (dot and dab’) & mechanically fixed installation techniques can be used to install this product. This product can be used in pitched roof, flat roof and wall applications and achieved a fire rating of – Euro Class B.