80mm Unilin Thin-R FR/MG Flat Roof Insulation Board

80mm Unilin FR/MG Flat Roof Insulation Board is a premium Polyisocyanurate product featuring mineral-coated glass facers, engineered for use beneath single-ply waterproofing systems and partially bonded built-up felt installations.

These 80mm roof insulation boards are installed using approved mechanical fixings or appropriate adhesive bonding. Assessment of vapour control layer requirements should follow National Building Regulations guidance.

80mm Unilin Thin-R FR/MG was previously known as 80mm Xtratherm Thin-R FR/MG.

Product Specification

Brand: Xtratherm / Unilin ®

Model: 80mm FR/MG

Thickness: 80mm

Length: 1200mm

Width: 600mm

Dimensions: 1,200mm x 600mm x 80mm

Board Coverage: 0.72m2

Pack Coverage: 4.32 m2

Pack Quantity: 6

Density: 30kg/m3

Colour: Cream

Material: Polyisocyanurate (PIR Insulation)

Profile: Square Edge

R-Value: 2.8m2K/W

Thermal Conductivity: 0.024W/mK

Compressive strength: CS (10\Y) 150

Reaction to fire: Euroclass E

Inner facing: Mineral glass facer

Outer facing: Mineral glass facer

Shipping method: Articulated Vehicle ǀ Courier

Applications: Flat Roof Insulation

BBA Certified: Yes (No. 11/4878)

Features: Mineral coated glass facers

Advantages:

1. Exceptional thermal performance across 80mm thickness
2. Suitable for adhesively bonded single-ply roofing membranes applied to mechanically fixed or bonded board substrates
3. Environmental Product Declaration (EPD) certification available through IGBC

Roof Design

Refer to BS 4841: Part 3 and Single Ply Roofing Association technical guidance for design considerations.

Falls

Flat roofs require consistent falls with sufficient gradient to prevent water pooling and ensure proper drainage.

Fire Performance

Fire classification for 80mm Unilin FR/MG, when assessed to EN 13501-5 and BS 476 Part 3 'External Fire Exposure Roof Test', depends on the waterproofing system selected.

Vapour Control Layer

An approved continuous vapour control layer must be installed beneath the insulation (except over sealed metal deck systems). For mechanically fixed boards, use minimum 1000 gauge polythene with lapped and sealed double-sided tape joints beneath the Roof insulation. At vertical upstands and penetrations, turn up and seal the VCL to fully encapsulate the insulation layer before completing the roof finish.

Info

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