90mm Unilin FR/ALU Flat Roof Insulation Board

90mm Unilin FR/ALU stands as a premium Polyisocyanurate flat roof insulation solution with vapour-tight aluminium foil facings, perfectly matched to single-ply membranes. This product forms part of Unilin's comprehensive range of performance-driven flat roof boards, delivering integrated solutions for all flat roof applications.

Product specification

Brand: Unilin Insulation FR/ALU known as Xtratherm FR/ALU

Model: 90mm Unilin FR/ALU

Thickness: 90mm

Thickness: 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: 11.52m2

Pack Quantity: 4 sheets

Pack Weight: 36 kg

Dimensions: 2,400mm x 1,200mm x 90mm

Thermal Conductivity: 0.022 W/mK

R-Value: 4.09 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. Exceptional Thermal Efficiency
2. Foil facers providing effective vapor resistance
3. Suitable for mechanically fixed single-ply systems
4. This product has an Environmental Product Declaration (EPD) certified by IGBC. For additional information, please reach out to our technical support.

Advantages:

1. Exceptional Thermal Efficiency
2. Compatibility with mechanically fixed single-ply systems and loose-laid ballasted systems
3. Effective vapor resistance with foil facers
4. The product comes with an Environmental Product Declaration (EPD) certified by IGBC. For more information, please contact our technical support team.

About

The 90mm Unilin FR/ALU Flat Roof Insulation Board incorporates rigid polyisocyanurate PIR insulation board with gas-tight foil facings on both sides.

Engineered for thermal insulation and creating slopes on restricted-access concrete, timber, or metal flat roof decks in new and refurbished properties, this 90mm board delivers dual functionality.

When paired with a vapour control layer and a mechanically fixed single-ply roof waterproofing membrane, the 90mm Unilin FR/ALU Insulation Board achieves optimal thermal performance.

Installation involves positioning the boards over the vapour control layer in a staggered break-bonded pattern for comprehensive coverage.

To maintain secure placement, 90mm Unilin flat roof insulation boards must be secured using approved mechanical fixings.

Roof Design

Guidance from BS 4841: Part 3 and the Single Ply Roofing Association should inform your design decisions.

Falls

Flat roof falls must be consistent and sufficiently steep to prevent water pooling.

Fire Performance

Fire rating, as determined by EN 13501-5 and BS 476 Part 3 'External Fire Exposure Roof Test', depends on the selected waterproofing system.

Note: This board was formerly known as 90mm Xtratherm Thin-R FR/ALU Flat Roof PIR Insulation Board

Info

Browse our Xtratherm range and refine by thickness or coverage using the left-hand filters. For project suitability advice or bulk quotations, contact us on +4402038839057 , email sales@insulationbee or use Live Chat - Lowest UK Roof Insulation Board Prices.