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DuoRock cut to falls

Third party certifications:
  • BSI Kitemark

    Certificate type

  • QA Certificate

    Certificate type


Tapered, dual-density, insulation boards.

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+44 (0)1656 862621 www.rockwool.co.uk

A range of dual-density stone wool roofing boards for use under mechanically fastened, cold adhesive and hot bitumen applied membranes. Its tapering thicknesses enable falls to be formed on new build and refurbishment projects. Pre-cut mitres for both hips and valleys are available.

DuoRock cut to fall boards are strong enough to bear normal foot traffic associated with installation and routine maintenance inspections of the roofing system.

Rockwool DuoRock is CE and Key marked in accordance with BS EN 13162.

Non-combustible, achieving a classification of A1 in accordance with BS EN 13501-1.

Rockwool insulation products do not contain blowing agents with an ozone depletion potential (ODP) or global warming potential (GWP), are CFC-HCFC-HFC free and 97% recyclable. They will not react with metal components or cause loss of plasticiser from PVC cables and pipes.

General information
Specification data - Mineral wool slab insulation
Product Reference

DuoRock cut to falls


___ mm

Standard product features


1200 x 1000 mm.

Thermal conductivity:

0.038 W/mK.

Product Options


Tapered, with minimum thicknesses from 30 mm. Consult Rockwool Limited to establish requirements to suit roof shape and falls.


  • Plain – For mechanically fastened single-ply membranes.
  • Tissue faced – For hot applied bituminous felts.
  • Scrim faced – For cold adhesive single-ply membranes.

Third party certifications
  • BS 476: Part 21. : 60 minutes load-bearing fire resistance (cert. 022a). LPCB approved
  • Factory Mutual : Approval Report no. JI 3010637 Approved for Class 1 insulated steel deck constructions
  • BS EN 13501-1. : Class A1 Non-combustible (cert. 022e). LPCB approved
  • LPS: 1181:Part 1 EXT-A60 and EXT-B (cert. 022g). : LPCB approved
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