90mm Unilin Thin-R FR/ALU Flat Roof PIR Insulation Board (pack of 4)
90mm Unilin Thin-R FR/ALU Flat Roof PIR Insulation Board (pack of 4)
- Product Code: A1-4954
- Delivery Time: 1-3 working days
- Brand: Unilin (prev. Xtratherm) (Tech. support: 03712221055)
- Model: 2400x1200mm - 11.52m2
- Weight: 33.18kg
Our ratings on 06-02-2026:
4.8 out of 5
90mm Unilin Thin-R FR/ALU Flat Roof PIR Insulation Board (pack of 4)
Length: 2400mm
Width: 1200mm
Thickness: 90mm
Pack Quantity: 4
Board Coverage: 2.88m2
Pack Coverage: 11.52m2
Density: 32kg/m3
Weight/m2: 2.88kg
Weight: 33.18kg
Thermal Conductivity: 0.022W/mK
R-Value: 4.1m2K/W
Compressive Strength: 150kPa
Fire Rating (Reaction to Fire): E
90mm Unilin Thin-R FR/ALU Flat Roof PIR Insulation Board is a flat roof insulation with enhanced vapour resistant performance. Unilin Thin-R FR/ALU board is faced with low emissivity aluminium facings both sides. Rot proof and will remain effective for the life span of the building. Unilin Thin-R FR/ALU high thermal performance boards are compatible with mechanically fixed single ply systems and loose laid ballasted systems. This board i not suitable for applications with built-up bitumen based roofing or mastic asphalt systems.
Note: This board was formerly known as 90mm Xtratherm Thin-R FR/ALU Flat Roof PIR Insulation Board
APPLICATION
- Flat roofs
CHARACTERISTICS
- Superior performance PIR foam core,
- Can be readily cut using a sharp knife or fine toothed saw,
- Vapour-tight aluminium facings on both sides,
- Effective thermal performance,
- Limits the risk of condensation,
- For new build or refurbishment,
- Will have life as long as the roof waterproof covering,
- Rot proof and will remain effective for the life span of the building.
CERTIFICATION

Brand: Unilin (prev. Xtratherm)
Model: 2400mm x 1200mm - 2.88m2
Delivery Time: 1-3 working days
25mm Unilin Thin-r XT/PR-UF has a core of polyisocyanurate (PIR) bonded to low emissivity textured aluminium foil facings. Unilin XT/PR-UF board offers excellent insulation performance with excellent thermal conductivity. Unilin XT/PR-UF is CFC & HCFC free and is manufactured under the highest stand..
Guide Price: £14.34
£17.21 inc VAT
Brand: Unilin (prev. Xtratherm)
Model: 2400x1200mm - 8.64m2
Delivery Time: 1-3 working days
40mm Unilin Thin-R FR/ALU Flat Roof PIR Insulation Board is a flat roof insulation with enhanced vapour resistant performance. Unilin Thin-R FR/ALU board is faced with low emissivity aluminium facings both sides. Rot proof and will remain effective for the life span of the building. Unilin Thin-R FR..
Brand: Unilin (prev. Xtratherm)
Model: 1200mm x 2400mm - 2.88m2
Delivery Time: 1-3 working days
59.5mm Unilin Thin-R Thermal Liner XT/TL-MF is a composite insulated panel of 50mm Unilin PIR core with foil faces bonded to 9.5mm tapered edge plasterboard for mechanically fixing to internal walls. Unilin XT/TL-MF is designed to provide high levels of thermal insulation and dry lining in one opera..
Guide Price: £44.42
£53.30 inc VAT
Brand: Unilin (prev. Xtratherm)
Model: 2400mm x 1200mm - 2.88m2
Delivery Time: 1-3 working days
75mm Unilin Thin-r XT/PR-UF has a core of polyisocyanurate (PIR) bonded to low emissivity textured aluminium foil facings. Unilin XT/PR-UF board offers excellent insulation performance with excellent thermal conductivity. Unilin XT/PR-UF is CFC & HCFC free and is manufactured under the high..
Guide Price: £31.24
£37.49 inc VAT
Brand: Unilin (prev. Xtratherm)
Model: 2400mm x 1200mm - 2.88m2
Delivery Time: 7 - 10 days
106mm Unilin Safe-R 019/STP Phenolic Soffit Insulation Board is a high‑performance phenolic soffit insulation board designed for structural ceiling applications where both thermal efficiency and fire performance are critical. It combines a rigid phenolic insulation core with low‑emissivity foil..
Brand: Unilin (prev. Xtratherm)
Model: 1200x2400mm - 11.52m2
Delivery Time: 1-3 working days
100mm Unilin ECO360 MA Sarking PIR Insulation board has a bio-enhanced, halogen free core of modified polyisocyanurate (PIR) pitched roof insulation bonded to textured low emissivity foil facings. Unilin ECO360 MA Sarking board offers excellent insulation performance with excellent th..