146mm Unilin FR/TP Flat Roof Insulation Board

The 146mm Unilin FR/TP is a high-performance composite panel engineered for flat roof applications. It features a 140mm polyisocyanurate (PIR) core with foil facing, firmly bonded to 6mm WBP-grade plywood decking. This integrated design delivers superior thermal insulation whilst simultaneously functioning as structural decking, making it an excellent choice for new-build and flat roof refurbishment projects.

The 146mm Unilin FR/TP was previously known as 146mm Xtratherm FR/TP.

Product Specification

Brand: Unilin ®

Model: 146mm FR/TP

Dimensions: 2,400mm x 1,200mm x 146mm

Thickness: 140mm PIR + 6mm Plywood (146mm overall)

Length: 2400mm

Width: 1200mm

Weight: 35.90kg

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: 6.31m2K/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

Key Benefits:

1. Integrates roof insulation and decking functionality in a single product
2. Ideal for both new construction and roof refurbishment applications
3. Delivers rapid weatherproofing capabilities
4. Environmental Product Declaration (EPD) certified by IGBC
5. Single-fix installation combining insulation and structural decking
6. Suitable for new and refurbished roof systems
7. Accelerated weather protection

Roof Design

Refer to BS 4841: Part 3 recommendations and the certification requirements of your selected membrane manufacturer when designing flat roof systems.

Falls

Flat roofs require a consistent fall gradient that is sufficiently steep to prevent water pooling and ensure proper drainage.

Info

Explore our comprehensive Unilin range and refine your selection by thickness or coverage using the filters on the left. For technical advice on product suitability for your specific project or to request a bulk discount quotation, contact us at +4402038839057, email sales@insulationbee, or use our Live Chat service for competitive UK Insulation pricing.