Domestic & commercial roofing contractor services in London
0208 871 9323

GRP Roofing

GRP Roofing

GRP stands for Glass Reinforced Plastics and is being hailed as the new generation of flat roofing. The roof is essentially a specially developed resin system which accommodates every day regular contraction and expansion.

A properly laid fibreglass roof should last for at least 25 years with no measurable deterioration.

A GRP flat roof consists of the following components:

  • A new 18mm OSB3 (Object Stranded Board) tongue and groove plywood roof deck
  • Edge trims and up-stands for roof lights (and ventilation – see cold roof later)
  • A thick fiberglass fleece (450g/m2 or 600g/m2) impregnated with epoxy resin
  • Solar reflective top coat


To install a GRP roof to the highest standard, strict guidelines must be followed and the highest quality resin or topcoat must be used. A GRP roof is not as flexible as felt/EPDM nor does it breathe as well so it is imperative that meticulous planning goes into the installation of a GRP flat roof.

GRP flat roofing systems have many benefits, including:

  • Durability
  • Low Maintenance
  • Long Guarantees
  • Flexible Usage
  • Simple no-flame installation