Unilin Thin-R FR/MG 25mm Flat Roof Insulation Board

25mm 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 25mm 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.

25mm Unilin Thin-R FR/MG was previously known as 25mm Xtratherm Thin-R FR/MG.

Product Specification

Brand: Xtratherm / Unilin ®

Model: 25mm FR/MG

Thickness: 25mm

Length: 1200mm

Width: 600mm

Dimensions: 1,200mm x 600mm x 25mm

Board Coverage: 0.72m2

Pack Coverage: 12.96m2

Pack Quantity: 18

Density: 30kg/m3

Colour: Cream

Material: Polyisocyanurate (PIR Insulation)

Profile: Square Edge

R-Value: 1.04m2K/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. 25mm Unilin FR-MG delivers exceptional thermal performance characteristics
2. Works effectively with adhesively bonded single-ply roofing membranes applied to mechanically fixed or adhered boards
3. Environmental Product Declaration (EPD) certification from IGBC is available for this product

Roof Design

Reference BS 4841: Part 3 and Single Ply Roofing Association guidance when planning your roof system.

Falls

Flat roof falls must be consistent and sufficient to prevent water pooling and ensure proper drainage.

Fire Performance

Performance rating for 25mm Unilin FR-MG when tested under 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 should be positioned beneath the insulation (except over sealed metal deck systems). For mechanically fixed boards, use minimum 1000 gauge polythene as vapour control layer, lapped and sealed with double-sided tape 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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