Description
Kingspan Thermaroof TR26 100 mm Flat Roof PIR Insulation Board (2400 mm × 1200 mm, Pack of 3 - 8.64 m²)
Product Overview
Kingspan Thermaroof TR26 100 mm (2400 mm × 1200 mm) Flat Roof PIR Insulation Board is a high‑performance rigid thermoset polyisocyanurate (PIR) insulation board designed specifically for flat roof applications using mechanically‑fixed single‑ply waterproofing and modern warm‑roof build‑ups. With a large format board size and excellent thermal performance (λₙ = 0.022 W/m·K) it provides a dependable insulation layer for flat‑roof systems whether in new‑build or refurbishment.
Key Features & Benefits
- High‑performance rigid PIR core with a declared thermal conductivity of 0.022 W/m·K.
- Large board dimension of 2400 × 1200 mm reduces joint frequency, improving installation speed and reducing potential thermal bridging.
- Compatible with most mechanically‑fixed single‑ply waterproofing systems and suitable for use with green‑roof applications.
- Facings: Low‑emissivity composite foil facings on both sides, autohesively bonded to the PIR core — enhancing vapour resistance and long‑term stability.
- Excellent compressive strength (CS(10\Y)150) giving strong structural stability under roof traffic and wind‑uplift conditions.
- Suitable for fast‑track building programmes — the board is easy to handle and install compared to many other insulation types.
- Manufactured under accredited management systems (ISO 9001, ISO 14001, ISO 45001, ISO 50001) ensuring consistent product quality and sustainability credentials.
Applications / Typical Uses
- Ideal for insulating flat roofs in residential, commercial, industrial, and public buildings where high thermal performance is required.
- Suitable for new‑build and refurbishment projects using mechanically‑fixed single‑ply waterproofing or green‑roof systems.
- Especially useful where board size and fewer joints improve installation efficiency over large roof areas.
- Compatible for use over concrete decks, metal decks or timber decks (subject to correct detailing and vapour control layer) in warm‑roof constructions.
Installation & Handling
- Store the insulation boards flat, on a clean, dry, and level surface; protect from weather or moisture before installation.
- Do not use boards that have become wet or show damage.
- Lay boards in a staggered (break‑bonded) pattern so that long‑edge joints do not align across adjacent rows; joints should be lightly butted together.
- Boards may be mechanically fixed or adhered depending on the deck type and roof system design; ensure compatibility with the waterproofing manufacturer’s instructions.
- Ensure a suitable vapour control layer or sealed deck is in place beneath the insulation if required, and perform a condensation risk analysis for the roof build‑up.
- After laying the insulation, proceed with the installation of the waterproofing membrane strictly according to the membrane manufacturer’s instructions.
- Ensure continuity of insulation at parapets, penetrations, upstands and abutments to minimise thermal bridging.
- Because of the board’s large size (2400 × 1200 mm) and moderate thickness (100 mm), handle carefully during transport and installation to avoid edge or facing damage.
Compliance & Certification
- Manufactured to the standard BS EN 13165:2012 + A2:2016 for factory‑made rigid PIR insulation boards.
- Declared thermal conductivity λₙ = 0.022 W/m·K.
- Reaction to fire classification: Euroclass F.
- Compressive strength: CS(10\Y)150.
- UK Declaration of Performance (DoP) available for the product confirming essential characteristics and performance.
- Formal certification via British Board of Agrément (BBA) – Certificate No. 16/5332 for TR26 range – confirming suitability when installed as part of approved roof systems.
- Produced under ISO 9001 (Quality), ISO 14001 (Environment), ISO 45001 (Health & Safety), and ISO 50001 (Energy Management) certified systems.


























