Unilin Thin-R FR/MG 90mm Flat Roof Insulation

90mm Unilin FR/MG Flat Roof Insulation Board is a high-performance Polyisocyanurate product featuring mineral-coated glass facers, engineered for use beneath single-ply waterproofing systems and partially bonded built-up felt installations.

These 90mm FR/MG roof insulation boards must be installed using approved mechanical fixings or adequate adhesive bonding. Assessment of vapour control layer requirements should follow National Regulations guidance.

90mm Unilin Thin-R FR/MG was previously known as 90mm Xtratherm Thin-R FR/MG.

Product Specification

Brand: Xtratherm / Unilin ®

Model: 90mm FR/MG

Thickness: 90mm

Length: 1200mm

Width: 600mm

Dimensions: 1,200mm x 600mm x 90mm

Board Coverage: 0.72m2

Pack Coverage: 3.60 m2

Pack Quantity: 5

Density: 30kg/m3

Colour: Cream

Material: Polyisocyanurate (PIR Insulation)

Profile: Square Edge

R-Value: 3.6m2K/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 in 90mm thickness
2. Suitable for adhesively bonded single-ply roofing membranes on mechanically fixed or bonded substrates
3. Environmental Product Declaration (EPD) certified by IGBC available

Roof Design

Reference BS 4841: Part 3 and Single Ply Roofing Association guidance for design considerations.

Falls

Flat roofs must incorporate adequate fall gradients to prevent water pooling and ensure proper drainage.

Fire Performance

Fire rating for 90mm Unilin FR-MG, when tested to EN 13501-5 and BS 476 Part 3 'External Fire Exposure Roof Test', depends on the specified waterproofing system.

Vapour Control Layer

A continuous, approved vapour control layer must be installed below 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 below the Roof insulation. At vertical upstands and penetrations, turn up and seal the VCL to fully encapsulate the insulation before completing the roof finish.

Info

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