70mm Unilin Thin-R PIR Insulation Board

Unilin Insulation (formerly Xtratherm) Thin-R PIR

70mm Unilin Thin-R Insulation Board (2400mm x 1200mm x 70mm) is a high-performance PIR rigid foil faced polyisocyanurate thermal foam board with exceptional thermal conductivity of 0.022 W/mK. Ideal for roofs, walls, floors, and timber or steel framed structures.

About

70mm Unilin PIR delivers outstanding thermal performance on sloped roofs in ventilated, hybrid, or warm configurations. Minimising space intrusion whilst achieving superior U-values, this board significantly reduces heat loss through the roof structure. The foil facings provide excellent thermal bridging control. Suitable for pitched roof, wall, and floor applications, this lightweight board installs easily and offers fire resistance, water repellency, and minimal environmental impact.

Product Details

Thickness: 70mm

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: 3.18 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 ǀ High-performance ǀ Rigid

Warm roof insulation construction offers an effective solution for complex roof designs. Positioning insulation above or between roof timbers maintains structural temperature near internal conditions, reducing thermal stress and condensation issues.

Store 70mm PIR insulation on a clean, flat, covered surface away from ground contact. Polythene wrapping alone does not provide adequate outdoor protection. Protect boards during storage and installation. Insulation boards cut easily with a sharp knife or fine-toothed saw.

Key Facts

1. Unilin 70mm 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 fit.
7. Minimises thermal bridging.
8. Ventilated roof compatible.
9. Warm roof compatible.
10. Hybrid roof compatible.

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