Kingspan Thermaroof TR26 Flat Roof Board (All Sizes) 2400mm x 1200mm All Insulation
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Kingspan Thermaroof TR26 Flat Roof Board (All Sizes) 2400mm x 1200mm

SKU: TR26 25mm

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  • High-performance rigid polyisocyanurate insulation.
  • Compatible with PVC single-ply waterproofing.
  • Resistant to water vapor, solvents, fungi, and rodents.

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These products are sold in pack quantities only. Price listed is per pack. Please see pack quantities below.

Thickness Boards Per Pack Coverage Per Pack
25mm 12 34.56m2
50mm 6 17.28m2
60mm 5 14.4m2
70mm 4 11.52m2
80mm 4 11.52m2
90mm 3 8.64m2
100mm 3 8.64m2
105mm 3 8.64m2
110mm 3 8.64m2
120mm 2 5.76m2
125mm 2 5.76m2
130mm 2 5.76m2
140mm 2 5.76m2
150mm 2 5.76m2


Discover the Kingspan Thermaroof TR26 Flat Roof Board, your go-to solution for superior flat roof insulation. This rigid, fibre-free polyisocyanurate board offers high performance and easy installation, measuring at 2400mm x 1200mm. With features like compatibility with PVC single-ply waterproofing, resistance to water vapor and environmental certifications, including ISO 14001:2015, it's the ideal choice for new builds or refurbishments. Trust Kingspan for durable, CFC and HCFC-free insulation that exceeds industry standards.

Key Features

  • Rigid, fibre-free insulation board.
  • Compatible with PVC waterproofing.
  • Resistant to water vapor, solvents, and fungi.
  • Environmentally friendly: CFC and HCFC free.
  • Easy to handle and install.
  • High performance: thermal conductivity of 0.022 W/m.K.
  • Compressive strength of 150 kPa.
  • Certified to ISO 14001:2015 and BES 6001.



  1. Thermal conductivity: 0.022 W/m.K.
  2. Compressive strength at 10% compression : 150 kPa
  3. Water vapour resistance: Greater than 100 MN.s/g
  4. Kingspan Thermaroof TR26 is available with FM Approval to FM 4470 - please see the product brochure or search 'Kingspan Therma' on the FM Approvals online listing website for the conditions of approval.


  1. BS EN ISO 9001: 2015
  2. BS EN ISO 14001: 2015
  3. ISO 45001: 2018 (Occupational Heath & Safety Management Systems. Requirements with guidance for use)


Frequently Asked Questions

What makes the Kingspan Thermaroof TR26 a suitable choice for flat roofs? The Thermaroof TR26 is a rigid, fibre-free polyisocyanurate insulation board designed for optimal flat roof performance. Its compatibility with PVC single-ply waterproofing systems and resistance to water vapor make it an ideal solution.

Is the installation process complicated? No, installation is easy and straightforward. The board is designed for convenience, with a size of 2400mm x 1200mm, making it manageable for various projects, whether it's a new build or a refurbishment.

How does it contribute to environmental sustainability? The Thermaroof TR26 is CFC and HCFC free, manufactured to high environmental standards, and certified to ISO 14001:2015 and BES 6001, ensuring a minimal impact on the environment.

What is the thermal conductivity of the TR26 board? The board boasts a high-performance thermal conductivity of 0.022 W/m.K, providing excellent insulation for flat roofs.

Is the board resistant to external factors such as solvents, fungi, and rodents? Yes, the TR26 is resistant to solvents, fungi, and rodents, ensuring durability and longevity.

Can it be used for both new build and refurbishment projects? Absolutely. Whether you're starting from scratch or upgrading an existing structure, the TR26 is an ideal choice for both new build and refurbishment projects.

What certifications does the product hold? The Thermaroof TR26 is certified to ISO 14001:2015 and BES 6001, demonstrating its commitment to environmental and sustainable practices.

Length 2400mm
Width 1200mm
Coverage Per Sheet 2.88m2
Thermal Conductivity 0.022 W/mK
Material Type Polyiso

Est Delivery between and .

Delivery will always take place on a weekday (Mon - Fri).
For more information on delivery visit our delivery info page.

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