ROCKWOOL Hardrock® – official product image

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ROCKWOOL · Roof insulation

ROCKWOOL Hardrock®

Hardrock provides flexibility in terms of design, cost and usage in a membrane roofing system. ROCKWOOL roofing boards offer three different types of roofing insulation systems to allow owners, designers and installers to achieve the desired performance.

0.038 W/m·K
Thermal conductivity λ: Euroclass A1
Reaction to fire (EN 13501-1): 0.5 kg/m²
Water absorption

FM Approved
SGBC
SIRIM

Request a quotation Data sheet (PDF) ↗

Supplied by World Steel with your steel building or on its own – one order, one shipment, one partner.

Overview

About Hardrock®

ROCKWOOL Hardrock roofing boards provide a one stop solution to roofing insulation requirements. They are suitable for new and re-roofing applications on metal deck or concrete deck and has proven track records in various international projects. The roofing boards have been developed to offer two types of roofing performances to address the challenge in membrane and metal roofing design for roof designers.

Application: Flat Roof high compression strength insulation for flat roofs

Key benefits

FM Approved - Assures high quality standards and compliance to insurance requirements.
ROCKWOOL roofing boards offer high resistance to compression and point loading in order to facilitate periodic maintenance of roof.
ROCKWOOL roofing boards provide an unrivalled combination of thermal, acoustics and fire performances.
Have excellent acoustical properties and were able to achieve STC 41.
The boards were secured with insulation fasteners into the concrete or metal deck, hence allowing fast installation to reduce construction time.
ROCKWOOL roofing boards are dimensionally stable and ensure constant thermal resistance value. The roofing boards do not contain CFC’s or HCFC’ insulant that could diffuse from the board over time and reduce its R-value.

World Steel · building envelope hub

How we use Hardrock® in steel buildings

ROCKWOOL Hardrock® boards insulate flat roofs on metal or concrete deck under a waterproofing membrane – for example the flat roofs of multi-storey steel buildings, data centres and plant rooms. World Steel supplies them with the steel structure and metal deck, sized with the roof design and shipped in the same package.

01Specified with the structure – thickness, density and facing matched to the roof, wall and fire design.
02Quantities taken from the same 3D model as the steel, purlins and cladding.
03Packed and shipped with the steel package – one delivery schedule to site.

Applications

Where Hardrock® is used

Roof Insulation › Flat Roof

Technical data

Hardrock® – technical properties

Thermal conductivity

Property	Unit	Value
Thermal conductivity	W/m·K	0.038

Technical properties

Property	Unit	Value
Reaction to Fire	Euroclass	A1
Water Absorption	kg/m2	0.5
Water Vapour Absorption	%	1

Values as published by the manufacturer for this market. Always check the current data sheet and the approvals required for your project before ordering. Manufacturer page ↗

Approvals & labels

Listed approvals for Hardrock®

FM ApprovedApproved by FM Approvals for the roof assemblies listed in the FM Approval Guide.

SGBCSingapore Green Building Product certification by the Singapore Green Building Council.

SIRIMProduct certification by SIRIM QAS International, Malaysia.

Approvals as shown by the manufacturer for this product. Certificates and listings apply to the tested product and system – request the current copies with your quotation.

Documents