Minimum Order Quantity: 8 items
Unilin (formerly Xtratherm) FR/ALU is a high-performance PIR insulation, featuring vapour-tight aluminium foil facings, designed for use on flat roofs with single-ply membranes.
Key Features:
- High thermal performance PIR insulation for flat roofs
- Vapour-tight aluminium foil facings, suitable for single-ply membranes
- Compatible with mechanically fixed or loose-laid ballasted systems
- Available in a range of thicknesses
Specification:
- Dimensions: 2400mm x 1200mm
- Density (Foam Core): 32 kg/m³
- Compressive Strength: >150kPa @ 10% Compression
- Thermal Conductivity: 0.022 W/mK
FR/ALU is ideal for use below single-ply mechanically fixed roof membranes.
Note:
FR/ALU is not suitable for applications with built-up bitumen-based roofing or mastic asphalt systems
Unilin FR/ALU boards should be laid in a break-bonded pattern over a vapour control layer, with long edges perpendicular to corrugations.
They are secured by approved mechanical fixings.
For proper sealing, a 1000 gauge polythene vapour control layer should be used, with joints lapped and sealed.
FR/ALU boards can handle maintenance traffic, but walkways should be provided for regular pedestrian access.
Protective boarding is advised if further site work occurs.
When the insulation boards have been positioned, the laps are turned over and sealed, prior to the roof finish being completed.
The long edges of the boards should be laid at right angles to the corrugations, and all board joints must be fully supported by the deck.
The FR/ALU insulation boards are generally secured by approved mechanical fixings.
Care should be taken to ensure that the concrete deck is graded to the correct falls, dry, clean, and free from any projections or gaps.
Architectural specifications should be consulted.
Generally, with 2400mm x 1200mm boards, a minimum of 6 fixings are adequate, located between 50mm and 150mm from all edges.
Additional fixings may be placed along the centreline.
Additional fixings around the roof perimeter may be required.
11 fixings per 2400mm x 1200mm sheet are recommended.
Countersunk washers, 50mm in diameter, should be used with each fixing.
However, BS 6399: Part 2 should always be consulted.
During the construction process, the construction should be protected from rain penetration during breaks in the process.
What Makes This Different from Unilin (previously Xtratherm) Floor Insulation Boards?
- Manufactured with slightly higher compressive strength—i.e., it can withstand more loading.
- Manufactured to tighter tolerances—for fixing the waterproofing and/or airtight membranes, etc.
- There are fewer steps built into the surface of the insulation.
Specification Statement:
The flat roof insulation shall be Unilin (previously Xtratherm) Thin-R FR-ALU, manufactured to EN 13165 by Xtratherm, comprising a rigid Polyisocyanurate (PIR) core between low emissivity foil facings.
The FR-ALU_ _ _mm with an Agrément declared Lambda value of 0.022 W/mK to achieve a U-value of __ _ _W/m²K for the roof element.
To be installed in accordance with instructions issued by Xtratherm.
Information about the Xtratherm Thin-R Range:
Unilin (previously Xtratherm) Thin-R range is a high-performance foil-faced Polyisocyanurate (PIR) insulation with a certified thermal conductivity as low as 0.022 W/mK.
Thin-R is also available with engineered jointing to provide improved continuity and thermal bridging performance.
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