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Price range: £182.62 through £348.96
Kingspan Thermaroof TR26 is a premium, rigid PIR (polyisocyanurate) insulation board designed for flat roofs waterproofed with fully adhered single-ply membranes. Suitable for both new build and refurbishment projects, it provides outstanding thermal performance, moisture resistance, and long-term durability.
The Kingspan Thermaroof TR26 insulation board delivers exceptional energy efficiency and reliable protection for adhered flat roof systems. Manufactured from a high-performance PIR insulation core and faced on both sides with tough, mineral-coated glass tissue, TR26 is engineered for superior compressive strength and dimensional stability.
This insulation is ideal for use with fully adhered single-ply waterproofing systems on concrete, timber, or metal decks. Its rigid structure resists deformation under load, while its closed-cell core prevents water ingress—ensuring long-lasting insulation performance even in exposed roofing conditions.
Designed to meet the latest Building Regulations and thermal requirements, Kingspan TR26 combines ease of installation with dependable energy-saving performance for a wide variety of flat roofing projects.
Fully adhered single-ply flat roof systems
Warm roof constructions on metal, timber, or concrete decks
Commercial, industrial, and residential roofing
Thickness | Board Size (mm) | Boards per Pack | Coverage per Pack (m²) |
25 mm | 1200 x 2400 | 12 | 34.56 |
50 mm | 1200 x 2400 | 6 | 17.28 |
60 mm | 1200 x 2400 | 5 | 14.4 |
70 mm | 1200 x 2400 | 4 | 11.52 |
80 mm | 1200 x 2400 | 4 | 11.52 |
90 mm | 1200 x 2400 | 3 | 8.64 |
100 mm | 1200 x 2400 | 3 | 8.64 |
110 mm | 1200 x 2400 | 3 | 8.64 |
120 mm | 1200 x 2400 | 2 | 5.76 |
130 mm | 1200 x 2400 | 2 | 5.76 |
140 mm | 1200 x 2400 | 2 | 5.76 |
150 mm | 1200 x 2400 | 2 | 5.76 |
| 160 mm | 1200 x 2400 | 2 | 5.76 |
Product Name: Kingspan Thermaroof TR26
Core Material: Rigid Polyisocyanurate (PIR)
Facing: Mineral-coated glass tissue (both sides)
Thermal Conductivity (λ-value): 0.022 – 0.026 W/m·K (dependent on thickness)
Compressive Strength: ≥150 kPa at 10% compression
Board Size: 1200 mm x 2400 mm
Applications: Fully adhered single-ply flat roof systems
Typical Deck Types: Concrete, timber, metal
Certification: BBA approved
Compliance: Meets Building Regulations Part L
Kingspan is a market leader in building envelope and insulation products for energy-efficient roofing. Their systems are engineered for performance, helping meet thermal targets while simplifying installation.
