Flat Roof Solutions

ROCKWOOL insulation for flat roof and built up metal roofs has been designed to meet the demands of modern roof systems, providing durable solutions.

HARDROCK® Multi-Fix Angle Fillet *

Stone wool insulation solution for bituminous waterproof membranes at 90° abutments

The area between horizontal and vertical interfaces can be a challenging part of a flat roof to insulate and seal. HARDROCK® Multi-fix Angle Fillets have been designed to create a smooth transition at 90° abutments, for effective flat roof insulation and waterproofing.


Insulation for upstands and parapet walls

Consisting of a dense ROCKWOOL insulation slab bonded to a rigid 6mm exterior-grade fibre cement board, this combination of two non-combustible products provides an insulation solution for flat roof upstands and parapet walls.

HARDROCK® Multi-Fix (DD)*

Non-combustible flat roof insulation

HARDROCK Multi-Fix (DD) is a BBA-approved (CERT NO. 21/5878) insulation board, that in addition to thermal comfort, provides independently tested acoustic and fire resistance properties.

HARDROCK® Multi-Fix Recovery Board *

Stone wool insulation board for refurbishment applications.

Specifically developed for use on flat roof refurbishment projects, HARDROCK® MultiFix Recovery Board is a non-combustible board compatible with all commonly used flat roof membranes, including single-ply, EPDM, bitumen and liquid-applied systems.

ROCKWOOL Flat Roofing Insulation products – exclusively available at SIG Roofing Stratford. Visit the team today at SIG Roofing Stratford 140 Abbey Lane (access via Rickroberts Way) Stratford, London E15 2RW or call 020 8536 5400

*To find out more on the individual products, performance details and data sheet please visit Flat Roof Range (

Registered Office: SIG Trading Limited, Adsetts House, 16 Europa View, Sheffield Business Park, Sheffield, S9 1XH. Registered in England No. 01451007 VAT No. GB 487 01733