You have no items in your
The UK’s Largest GRP Manufacturer


Dormer – BBA Approved, lightweight, stylish and safe

The Stormking GRP Dormer window roof, offers the builder alternatives to traditional building materials with a product that is lightweight, quick to install and virtually maintenance free and with BBA accreditation, give the builder whole life cost savings.

The Stormking (BBA approved GRP dormer window roof is manufactured in various styles and sizes and is factory finished complete with full internal timber frame and is spray foam insulated; with GRP side cheeks; either a GRP flat top roof, GRP shallow arched roof, apex GRP reproduction tiled roof, apex trussed ready to tile roof or hipped trussed ready to tile roof, fascia and soffit; and complete side gutter flashing detail. All of our Stormking GRP dormer window roofs comply with our BBA certificate ref No. 17/5434.

The Stormking GRP Dormer roof is an all-in-one solution that cuts costs without compromising quality. Extra specialist engineering goes into each dormer’s inner structural support, so you can rely on a safe and sound product that still boasts a refined profile.

NEW! Warma Dormer meets higher thermal requirements.

Enhanced insulation enables you to meet requirements for higher code level developments. Our in house architects will supply all bespoke designs, as well as independent ‘U’ and PSI values for your assessments and certificates. Plus, Warma dormer still look great – despite the added insulation materials, Warma dormers maintain the same slim profile as any standard dormer.

Doing the right things and doing things right:

  • BBA certified and independently assessed to UKAS standards.
  • ISO 14001 Environmental Management Systems.
  • ISO 9001 Management Systems.
  • Meets NHBC Technical Standards
  • 0.71 Eco-points per ton
  • Sustainability – We only purchase timber from suppliers registered to a recognised FSC/PEFC scheme.