What is Celotex PL4055? Celotex  PL4000  range offers a variety of sizes of 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. Achieves a BRE Green Guide A+. This thermal laminate board has a thickness of 67.5mm in total with 55mm of PIR insulation bonded to a 12.5mm tapered edge plasterboard but it is also available in the below sizes: • PL4015 - 15mm / 27.5mm • PL4025 - 25mm / 37.5mm • PL4040 - 40mm / 52.5mm • PL4045 - 45mm / 57.5mm • PL4050 - 50mm / 62.5mm • PL4055 - 55mm / 67.5mm • PL4060 - 60mm / 72.5mm • PL4065 – 65mm / 77.5mm Benefits of Celotex PL4055: • Offers the ability to install both the insulation & plasterboard in one operation, therefore reducing installation times • Suitable for both direct bonding (dot and dab’) & mechanically fixed installation techniques • Offers the installer maximum flexibility & installation speed due to the tapered edge plasterboard • Provides reliable long-term energy savings for buildings • Can upgrade to current building regulation standards • Ideal for both new build and refurbishment projects • Can be used in pitched roof, flat roof and wall applications • Fire Rating – Euro Class B