15mm Unilin Thin-R PIR Insulation Board

Unilin Insulation (formerly Xtratherm) Thin-R PIR

15mm Unilin Thin-R Insulation Board (2400mm x 1200mm x 15mm) is an ultra-thin rigid foil-faced polyisocyanurate (PIR) thermal foam insulation board suitable for multiple applications. With a certified thermal conductivity of 0.022 W/mK, it delivers excellent thermal performance for roofs, walls, floors, and timber and steel-framed structures.

About

15mm Unilin PIR provides outstanding thermal efficiency with minimal impact on internal space. Roof insulation is a crucial component of building performance, where heat loss is a significant concern. This board reduces thermal losses whilst delivering superior thermal bridging performance. Suitable for various construction types including pitched roof insulation, walls, and floors, the product combines thin profile with lightweight handling and straightforward installation. The board offers fire resistance, water repellency, and minimal environmental impact.

Product Details

Thickness: 15mm

Length: 2400mm

Width: 1200mm

Overall Thickness: 15mm, 20mm, 25mm, 30mm, 35mm, 40mm, 45mm, 50mm, 60mm, 65mm, 70mm, 75mm, 80mm, 90mm, 100mm, 110mm, 120mm, 130mm, 140mm, 150mm, 160mm, 165mm

Maximum board weight: 0.45 kg/m²

Thermal Resistance: 0.68 m²K/W

Thermal conductivity: 0.022 W/mK

Compressive strength: >150 kPa

Water Vapour Resistivity: >100 MNs/gm

Density (Foam Core): 30-32 kg/m³

Surface spread of flame: Class 1

Reaction to fire: E

Finish: Aluminium Foil Facings

Applications: Roofs, Walls, Floors, Timber & Steel Frame

ETA Notification: Yes

Features: Versatile | High-performance | Rigid

Warm roof insulation construction offers an effective solution for complex roof designs. Positioning insulation above or between roof timbers maintains structural temperature close to internal conditions, minimising thermal stress and condensation problems.

The 15mm PIR insulation must be stored on a clean, flat surface away from ground contact and protected from weather exposure. Polythene wrapping alone does not provide adequate outdoor protection. Proper storage care during delivery and installation is essential. The insulation boards can be easily cut with a sharp knife or fine-toothed saw.

Key Facts

1. Unilin 15mm PIR achieves an A+ rating under the BRE Green Guide.
2. Certified Lambda value of 0.022 W/mK.
3. Minimises intrusion into living space.
4. Reduces condensation risk.
5. Low emissivity foil facings.
6. Lightweight and simple to install.
7. Enhanced thermal bridging performance.
8. Ventilated roof compatible.
9. Warm roof compatible.
10. Hybrid roof compatible.

Browse our Unilin range and filter by thickness or coverage using the left-hand menu. For project suitability advice or bulk quotations, contact us on +4402038839057, email sales@insulationbee, or use Live Chat for the best UK Insulation prices.