GRP Fibrecolour doors are constructed using two 2mm thick GRP woodgrain skins permanently bonded to a perimeter sub-frame of synthetic material and filled with an insulating polyurethane core. The rigid polyurethane foam core is CFC and HCFC free, has an ozone depletion potential (ODP) of zero and a global warming potential (GWP) of less than five. The synthetic material of the sub-frame can be worked in a similar way to timber. GRP Fibrecolour doors can be trimmed in width and cut down in height, allowing doors to be sized to fit existing openings for refurbishment projects. The slab construction provides a fully sealed product impervious to moisture.
GRP Fibrecolour doors have a U value through the doors of 0.55W/m2K, equivalent to approximately four solid timber doors.