Stronghold GRP Roofing Kit 90m² 450g
Stronghold 90m² GRP fibreglass roofing kit in 450g standard-duty specification. Covers flat roofs up to 90 square metres with estimated material quantities listed below. Available in Medium Grey (RAL 7046) or Dark Grey (RAL 7043).
Suitable for most domestic flat roofs and normal maintenance access. The 450g chopped strand mat is the standard reinforcement specification for most domestic flat-roof applications; for heavier or more frequent foot traffic, choose a 600g or balcony-grade system.
Materials ready reckoner — 90m²
Calculated estimates from the UK Hardware Stronghold ready reckoner.
- Resin: 7 × 20 kg + 1 × 10 kg Stronghold Premium GRP roofing resin
- Topcoat: 2 × 20 kg + 1 × 10 kg Stronghold GRP topcoat in your selected colour
- 450 gsm CSM: 1 × 33 kg + 1 × 16.5 kg fibreglass chopped strand mat
- Hardener: 1 × 5 kg + 3 × 1 kg MEKP catalyst/hardener
- Bandage: 1 × 4″ CSM Bandage (73m) Roll
Basis: resin 1.6 kg/m²; topcoat 0.5 kg/m²; 450 gsm CSM plus 10%; whole packs rounded up.
Hardener stock allowance is calculated at 4% of the supplied resin and topcoat. Follow product instructions for actual mixing rates.
These are estimated material quantities, not verified manufacturer kit contents. Confirm matting specification before ordering. Trims, tools and additional upstand materials are excluded.
Product information
- 25-year materials guarantee, subject to manufacturer terms and correct installation
- BROOF (t4) rated system when installed to the applicable specification
- Free UK mainland delivery
Creates a seamless, waterproof GRP finish. Suitable for DIY and trade installation when fitted to the correct deck and manufacturer guidance.