61mm Unilin Thin-R FR/TP is a composite insulated board featuring a Polyisocyanurate core bonded to 6mm WBP grade plywood with foil facings. This integrated system delivers both thermal insulation and structural decking capabilities, making it particularly suited to new flat roof installations and refurbishment work.
The 61mm Unilin FR/TP was previously known as 61mm Xtratherm FR/TP.
Brand: Unilin ®
Model: 61mm FR/TP
Dimensions: 2,400mm x 1,200mm x 61mm
Thickness: 55mm PIR + 6mm Plywood (56mm overall)
Length: 2400mm
Width: 1200mm
Weight: 27.59kg
Compressive Strength: 150 kPa (10% Compression)
Density: 32 Kg/m3
Type: Thermal Ply High Performance PIR Insulation and Plywood Composite for Flat Roofs
Material: Polyisocyanurate core ǀ Plywood
Profile: Square Edge
Thermal Conductivity: 0.022W/mK
R-Value: 2.49m2K/W
Vapour Resistivity: 100 MNs/gm
Type of finishing board: 6mm WBP plywood
Inner facing: Foil Facer
Outer facing: Foil Facer
Finish: Gas-tight foil ǀ WBP Plywood
Shipping method: Articulated Vehicle ǀ Courier
Applications: Flat Roof Insulation ǀ Hot Bitumen ǀ Decking
Features: Rapid Weather Proofing ǀ 3 in 1 Solution
Follow the recommendations outlined in BS 4841: Part 3 and the specific guidance provided by your chosen membrane manufacturer.
Ensure the fall gradient on a flat roof is consistent and sufficient to prevent water pooling and drainage issues.
Explore our Unilin range and refine your selection by thickness or coverage using the filters on the left. For technical advice on product suitability or bulk pricing enquiries, contact us on +4402038839057, email sales@insulationbee, or use Live Chat - Competitive UK Insulation Pricing.








