125mm Unilin FR/ALU Flat Roof Insulation Board

125mm Unilin FR/ALU, previously known as 125mm Xtratherm FR/ALU, delivers premium-grade Polyisocyanurate flat roof insulation with vapor-tight aluminium foil facings on both sides. This product works brilliantly with single-ply membranes and forms part of Unilin's comprehensive range of high-performance flat roof boards, delivering everything you need for successful flat roof installations.

Product specification

Brand: Unilin Insulation FR/ALU (formerly Xtratherm FR/ALU)

Model: 125mm Unilin FR/ALU

Thickness: 125mm

Available Thicknesses: 25mm, 30mm, 40mm, 50mm, 60mm, 70mm, 75mm, 80mm, 90mm, 100mm, 110mm, 120mm, 125mm, 130mm, 140mm, 150mm

Length: 2400mm

Width: 1200mm

Board Coverage: 2.88m2

Pack Coverage: 8.64m2

Pack Quantity: 3 sheets

Pack Weight: 36 kg

Dimensions: 2,400mm x 1,200mm x 125mm

Thermal Conductivity: 0.022 W/mK

R-Value: 5.68 m2K/W

Colour: Light yellow

Density: 32 Kg/m3

Compressive Strength: > 150kPa

Material: Polyisocyanurate Rigid Foam ( PIR insulation board )

Profile: Square Edge

Fire Reaction: Euroclass B, s2-d0

Finish: Vapour resistant gas-tight foil

Inner facing: Foil Facing

Outer facing: Foil Facing

Applications: Flat Roof Waterproofing Systems

BBA Certified: Yes (No. 11/4817)

Fixing method: Mechanically fixed single ply waterproofing systems

Foil faced: Yes, gas-tight foil facings on both sides

Features: Composite gas-tight foil facings on both sides

Manufacturer: Unilin Insulation®

Main Highlights:

1. Outstanding thermal performance
2. Foil facers delivering reliable vapor resistance
3. Ideal for mechanically fixed single-ply applications
4. Comes with an Environmental Product Declaration (EPD) certified by IGBC. Contact our technical support team for further details.

Advantages:

1. Outstanding thermal performance
2. Works with mechanically fixed single-ply systems and loose-laid ballasted systems
3. Reliable vapor resistance thanks to foil facers
4. Supplied with an Environmental Product Declaration (EPD) certified by IGBC. Reach out to our technical support team for additional information.

About

The 125mm Unilin FR/ALU Flat Roof Insulation Board features rigid polyisocyanurate PIR insulation with gas-tight foil facings on both sides.

Engineered for thermal insulation and creating slopes on limited-access concrete, timber, or metal flat roof decks in new and refurbished buildings, this 125mm board serves multiple functions.

When paired with a vapor control layer and a mechanically fixed single-ply roof waterproofing membrane, the 125mm Unilin FR/ALU Board performs at its best.

Fitting FR/ALU flat roof boards means positioning them above the vapor control layer in a staggered pattern for comprehensive protection.

For reliable fixing, 125mm Unilin flat roof insulation boards should be secured using approved mechanical fixings.

Roof Design

Follow the guidance in BS 4841: Part 3 and the Single Ply Roofing Association's recommendations.

Falls

Flat roofs need consistent fall angles steep enough to prevent water pooling.

Fire Performance

Fire rating, when tested under EN 13501-5 and BS 476 Part 3 'External Fire Exposure Roof Test', depends on your chosen waterproofing system.

Note: This board was previously called 125mm Xtratherm Thin-R FR/ALU Flat Roof PIR Insulation Board

Info

Browse our Unilin range and refine by thickness or coverage using the filters on the left. Want to discuss which products suit your project best, or need a bulk discount quote? Call us on +4402038839057 , email sales@insulationbee or use Live Chat - Competitive UK Roof Insulation Board Pricing.