Unilin Thin-R FR/ALU PIR Flat Roof Insulation Boards

Key features:

  • High thermal performance PIR insulation board for flat roofs  
  • Features vapour-resistant composite aluminium foil facings suitable for use with single ply membranes  
  • Compatible with mechanically fixed single ply systems / loose-laid ballasted systems  
  • Available in selected thicknesses (50mm–150mm)  

Minimum Order Quantity: 8 units

Enter Eircode at checkout for delivery pricing.

From €43.00 €34.96 Regular Price €43.00 €34.96
Bulky Product
Delivery in
Approx 5 days
SKU
FRALU100MM-x
Brand
Unilin

Unilin Thin-R FR/ALU is a high-performance Polyisocyanurate (PIR) flat roof insulation board featuring vapour-resistant composite aluminium foil facings, designed for use with single ply membrane roofing systems.

It is part of Unilin’s Thin-R range of flat roof boards, providing a complete insulation solution for modern flat roof projects.

FR/ALU is suitable for mechanically fixed single ply waterproofing systems as well as loose laid ballasted systems, making it a versatile and reliable option for commercial and residential flat roof applications.

Manufactured to high standards, FR/ALU delivers excellent thermal performance, durability, and compatibility with a wide range of flat roof build-ups.

Key Features:
  • High thermal performance PIR insulation board for flat roofs
  • Polyisocyanurate (PIR) core with vapour-resistant composite foil facings
  • Composite aluminium foil facers suitable for single ply membrane systems
  • Compatible with mechanically fixed single ply waterproofing systems
  • Suitable for loose laid ballasted flat roof systems
  • Part of the Unilin Thin-R flat roof insulation range
  • Available in selected thicknesses (50mm, 75mm, 100mm, 125mm, 150mm)
  • Designed for warm flat roof constructions requiring high thermal efficiency
  • Fire classification: Euroclass E
Specification:
  • Dimensions: 2400mm x 1200mm
  • Material: PIR Roof Insulation
  • Density (Foam Core): 32 kg/m³
  • Compressive Strength: CS(10/Y)150 (≥150 kPa at 10% compression)
  • Thermal Conductivity: 0.022 W/mK
  • Reaction to Fire: Euroclass E
  • Facings: Composite aluminium foil facings (vapour resistant)
Applications:
  • Mechanically fixed single ply roofing systems
  • Ballasted flat roof systems
  • Warm flat roof constructions requiring high thermal efficiency

FR/ALU is specifically designed for use below single-ply membranes as part of a complete flat roof system.

Installation Overview:
  • Install over a 1000 gauge polythene vapour control layer
  • Joints lapped (150mm), sealed and turned up at upstands
  • Boards laid in a break-bonded pattern
  • Long edges at right angles to deck corrugations
  • Fully supported board joints required
  • Fixings and layout subject to wind uplift design calculations
Deck Types:
  • Metal/Timber decks: mechanically fixed
  • Concrete decks: mechanically fixed or ballasted systems
Fixings:
  • Typically 6–11 fixings per 2400mm x 1200mm board (subject to design)
  • Fixings placed 50–150mm from edges
  • 50mm countersunk washers used with each fixing
  • Final specification subject to structural and wind uplift design
Important Notes:
  • Not suitable for built-up bitumen or mastic asphalt systems
  • Protect from rain during construction breaks
  • Limited pedestrian traffic only; use walkways for access
  • Designed in accordance with BS 4841: Part 3 and Single Ply Roofing Association guidance
  • Fire performance depends on full roof system build-up
U Value Information:

Unilin FR/ALU foil-faced roof boards are suitable for use below single-ply mechanically fixed roof membranes. U-value performance varies depending on thickness, deck type, fixing specification and system build-up.

Product Details:
  • Range: Thin-R
  • Material: PIR Roof Insulation
  • Fire Declaration: Euroclass E
  • Product Type: Flat Roof Insulation Board
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