Soprema SOPRATHERM CW4070 70mm PIR Board

70mm Soprema SOPRATHERM CW4070 (previously Celotex CW4000) delivers high-performance thermal insulation for cavity wall applications with a thermal conductivity rating of 0.022 W/mK. The aluminium foil-faced construction provides exceptional thermal performance and is BBA certified for partial fill cavity wall installations (Certificate 24/7312). This product is supplied in thicknesses ranging from 50mm to 100mm.

Pack Size & Coverage

1. Brand: Soprema CW4000
2. Model: 70mm SOPRATHERM CW4070 (previously Celotex CW4070)
3. Thickness: 70mm
4. Length: 1200mm
5. Width: 450mm
6. Pack quantity: 8
7. Board Coverage: 0.54m2
8. Pack Coverage: 4.32m2
9. R-Value: 3.15m2K/W
10. Thermal Conductivity: 0.022 W/mk
11. Density: 30Kg/m3
12. Edge profile: Straight edge
13. Vapour Resistivity: 100 MNs/gm
14. Building Regulations: Compliant
15. Material: PIR
16. Finishing top: Alu-kraft
17. Finishing bottom: Alu-kraft
18. Shipping method: Articulated Vehicle
19. Applications: Cavity Walls ǀ Masonry Walls | 70mm Partial fill insulation
20. BBA Certified: Yes (no. 16/5343)
21. Features: High-performance Cavity Wall Board

The Soprema 70mm CW4070 PIR board is engineered to align with standard cavity wall tie spacing, eliminating the need for cutting during most installations. This design accelerates installation procedures and minimises labour costs on building sites.

When properly installed, Soprema CW4070 supports compliance with UK Building Regulations requirements for thermal efficiency and carbon reduction targets. The product carries BBA certification from the British Board of Agrément, confirming its reliability and thermal performance standards.

Benefits

1. Declared Thermal Conductivity (λD): 0.022 W/mK
2. Nominal Board Dimensions: 2400 x 1200 mm
3. Thickness Range: 40 mm to 100 mm
4. Edge Profile: Straight
5. Aluminium Foil Surface Emissivity: 0.05
6. BBA Certified: Certificate 25/7312 (Partial Fill Cavity Walls)

Application

• Primary Application: Partial-Fill Cavity Walls: 70mm Soprema CW4000 is installed against the inner leaf of masonry walls, leaving a typical 50 mm air gap to the outer leaf.
• New Build & Refurbishment: Suitable for both new masonry constructions and upgrading the thermal performance of existing cavity walls.

Reaction to fire

• 70mm SOPRATHERM CW4000 PIR insulation board has a Euroclass F reaction to fire rating according to BS EN 13501-1.
• Under current UK Building Regulations on combustibility, it must not be used in external walls of buildings over 11 m in height.
• Ensure 70mm CW4000 is specified and installed following all relevant Building Regulations, statutory guidance, and standards.

Standards & Certification

• Thermal conductivity: 0.022W/mK, according to BS EN 13165 for factory made rigid polyurethane foam (PU) product
• Spread of flame: Euroclass F Reaction to Fire classification, according to BS EN 13501-1. Products with this level of classification are not provided with a rating for smoke emission.
• BRE Green Guide Rating: A
• Certification: BBA certified

Info

Explore our full range of Sopratherm insulation products. We deliver throughout the UK Mainland. For product suitability advice, project specifications, or bulk purchase quotations, contact our team on 02038839057 / 02038839057, email sales@insulationbee.co.uk or use Live Chat - Lowest UK Insulation Prices near me.