Kingspan Thermaroof TR26 1200mm x 2400mm – 100mm

Kingspan Thermaroof TR26 1200mm x 2400mm – 100mm is a market-leading PIR flat roof insulation board, engineered by Kingspan Insulation for warm roof construction on both new build and refurbishment projects. Manufactured with a fibre-free rigid thermoset polyisocyanurate (PIR) core and low-emissivity composite foil facings on both sides, it delivers a class-leading thermal conductivity of 0.022 W/mK — making it one of the most thermally efficient flat roof boards available in the UK.

Key Features and Specifications

• Dimensions: 1200mm × 2400mm × 100mm (approx. 8′ × 4′)
• Coverage per board: 2.88 m²
• Core material: Fibre-free rigid thermoset polyisocyanurate (PIR) — Nilflam® technology
• Facings: Low-emissivity composite foil both sides
• Thermal conductivity (λ): 0.022 W/mK across all thicknesses
• Thermal resistance (R_D) at 100mm: 4.50 (m²·K)/W
• Compressive strength: 150 kPa at 10% compression
• Edge profile: Square edge
• Fire classification: Euroclass F (BS EN 13165:2012+A2:2016)
• Approvals: LPCB approved to LPS 1181 Part 1; FM approved for Class 1 steel deck roof assemblies (FM 4470)
• Environmental: BRE Green Guide rating A+; manufactured under ISO 14001:2015; BES 6001 ‘Excellent’ responsible sourcing; blowing agent with zero ODP and low GWP
• Standard: Manufactured to BS 4841-4; CE marked
• Resistant to: Water vapour transmission, solvents, fungi, and rodents
• CFC and HCFC free

Applications

• Warm flat roof insulation beneath mechanically fixed single-ply waterproofing membranes (TPO, PVC, EPDM)
• Compatible with most green roof and biodiverse roof systems
• Suitable for Class 1 steel deck roof assemblies
• New build commercial and residential flat roofs
• Flat roof refurbishment and re-roofing projects
• Not suitable for use with bitumen waterproofing or mastic asphalt systems

Why Choose This Product

The Kingspan Thermaroof TR26 100mm is the go-to choice for roofing contractors and self-builders who need proven thermal performance, straightforward installation, and full compliance with current UK Building Regulations. Its rigid board format installs quickly — ideal for fast-track programmes — and its square-edge profile ensures consistent coverage across large roof areas. LPCB and FM approvals, combined with an A+ Green Guide rating, give specifiers and contractors the confidence of independent third-party verification. Trade quantities are welcome.

Delivery in and Around London

We deliver Kingspan Thermaroof TR26 to London boroughs including Croydon, Lewisham, Southwark, Camden, and Hackney, as well as Greater London areas such as Enfield, Bexley, Redbridge, and Barnet. We also supply to the surrounding counties of Kent, Essex, Surrey, and Hertfordshire. Boards are available individually or in trade pack quantities — please contact us for bulk pricing and to confirm lead times for your area.