To help maximise saleable space whilst meeting U-value targets, Orion Homes has specified more than 3,000m2 of Celotex PL4000 PIR insulation bonded-to-tapered-edge plasterboard for its new Sunnydale Gardens housing development in West Yorkshire. Celotex PL4000 is a thermal insulation board where the PIR insulation is bonded to 12.5mm tapered edge plasterboard. Offering a lambda value of 0.022, Ofgem approval and …