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AllShield BarrierSheet® | Owens Corning
Lightweight non combustible A1 classified fire reaction layer in solar flat roof construction

Light in weight.

Heavy on performance.

A weight off your mind.

Why BarrierSheet

AllShield BarrierSheet® available by Owens Corning

Lightweight passive fire performance for flat roofs

AllShield BarrierSheet® available by Owens Corning is a thin, lightweight, non-combustible fire barrier sheet designed for flat-roof assemblies.

Installed directly between the roof insulation and the waterproofing membrane, BarrierSheet provides an additional fire protection layer within the roof build-up.

With an A1 reaction-to-fire classification, a weight of just 3.0 kg/m² and a nominal thickness of 2.5 mm, BarrierSheet combines documented fire performance with practical handling and easy installation on site.

It is designed for new construction and renovation of commercial and industrial flat roofs, including warehouses, logistics centres, production facilities and other large-roof buildings. It can be incorporated into flat-roof projects with or without rooftop solar PV installations.

BarrierSheet can be used with common roof insulation materials, including PIR and mineral wool, in suitable roof assemblies. Its lightweight design is particularly relevant to renovation projects where additional roof loading needs to be carefully considered.

Flat roof assembly on a steeldeck surface including insulation, photovoltaic mounting system and Allshield BarrierSheet

Key Benefits

Fire Performance

A1 non-combustible reaction-to-fire classification, with additional fire-testing evidence from defined flat-roof and rooftop PV configurations.

Light Weight

A thin, lightweight fire barrier sheet weighing just 3.0 kg/m², with a nominal thickness of 2.5 mm.

Easy Installation

Designed to fit your way of working and installation beneath the waterproofing membrane.

A product which is light and easy to carry, cut and fix on site. Designed to fit your way of working. Lightweight and easy to carry, cut and fix on site using standard roofing tools.

Documented Performance

From A1 to tested Broof (t1) roof configurations and a defined FM 4470 and FM 4478 approved construction. Supported by A1 classification, fire testing of defined BROOF(t1) roof assemblies and FM 4470 / FM 4478 approvals for specified roof constructions.

SEE IT IN 30 SECONDS

MEET ALLSHIELD BARRIERSHEET® AVAILABLE BY OWENS CORNING

Discover how this lightweight, non-combustible fire barrier sheet fits into flat-roof construction and renovation projects, with or without rooftop solar PV.

Build-Up

TYPICAL BUILD-UP

WHERE DOES THE BARRIERSHEET SIT IN THE ROOF?

BarrierSheet is installed between the roof insulation and the waterproofing membrane. BarrierSheet brings A1 non-combustible documented product characteristics together with tested roof assemblies and approved constructions into the roof build-up. Its position makes it relevant to all flat roof projects, including suitable roof systems with rooftop solar PV installations.

1. Structural roof deck

2. Vapor control layer

3. Roof insulation

4. Allshield BarrierSheet®

5. Waterproofing membrane

Five layer roof system build-up showing structural deck, vapor control layer, insulation, Allshield BarrierShee and roofe membrane.

Installation

Installation

EASY AND PRACTICAL TO INSTALL

Designed to fit your way of working. Lightweight and easy to carry, cut and fix on site using standard roofing tools. BarrierSheet is installed beneath mechanically fixed waterproofing membranes in suitable roof assemblies.

01

Prepare the substrate

Ensure the substrate is clean, dry, smooth and free from debris. Address uneven areas before installation.

02

Application of the sheets

Install BarrierSheet in a staggered bond pattern with butt joints, without overlaps and visible gaps.

03

Cut & Fix

Cut and install with standard tools and mechanically fix BarrierSheet according to the recommended fixing pattern and the installation guidelines 

04

Install the membrane

Install the specified roofing membrane with mechanical fixations in accordance with the manufacturer’s instructions and the approved roof assembly.

Download Installation Guidelines

Product Details

Technical

Product Characteristics

AllShield BarrierSheet® is a lightweight fire protective sheet for flat-roof assemblies.

The following technical characteristics are specified in ETA 26/0097

PRODUCT

Alls hield BarrierSheet

LENGTH (mm)

2000 ±4

WIDTH (mm)

1000 ±4

THICKNESS (mm)

2,5 ±0,3

WEIGHT (kg/m2)

3,0 ±0,45

REACTION TO FIRE

A1 (EN13501-1)

SHAPE

Flexible flat board/sheet

USE

Fire protective board in flat-roof assemblies

Downloads

DOWNLOADS

TECHNICAL DOCUMENTS, FIRE TESTING, CERTIFICATION & APPROVALS

Access the technical information, installation instructions and supporting fire-performance documentation for AllShield BarrierSheet®.

Installation
guide

PDF, 2.4 MB

Download

Declaration of performance

PDF, 0.8 MB

Download

Certification
overview

PDF, 0.6 MB

Download

DESIGNED FOR THE PEOPLE BEHIND EVERY ROOF PROJECT

From technical specification and roof system design to installation on site and rooftop solar PV projects, BarrierSheet addresses different priorities across the flat-roof value chain.

Roofing contractors & installers

Less weight on the roof. Practical on Site.


A lightweight fire protection sheet that is easy to carry, cut and fix using standard tools, designed to support practical installation in flat-roof projects.

Specifiers & Engineers

Documented performance. Minimal added weight.


An A1 non-combustible sheet weighing just 3.0 kg/m², supported by technical documentation and fire-testing evidence for defined roof assemblies. Particularly relevant when evaluating load constraints in renovation projects.

Solar & roof renovation companies

Lightweight fire protection for evolving roof requirements.


A thin, lightweight layer for suitable flat-roof assemblies, including projects with rooftop solar PV installations. Designed to support the evaluation of fire performance and additional structural loading.

FAQ

Frequently Asked Questions

Contact Us

Talk to us about your next flat roof project

Planning a new flat roof, a renovation or a rooftop solar PV installation?

Our team can help you explore BarrierSheet for your project, request product samples and access technical documentation, installation guidance and information on tested roof assemblies.

Contact our team
Request a sample
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