140mm ThermaFleece CosyWool Flexible Slab 370mm

140mm Thermafleece CosyWool Slab 370mm is a flexible, high-performance insulation product that delivers all-round thermal and acoustic performance while offering excellent value for money.

Made from a wool-rich blend of fibres that are thermally bonded, 140mm CosyWool Slab is designed for durability and long-lasting stability, preventing slumping over time. Research shows this blend outperforms insulation products with a higher wool content, giving you the benefits of 100mm sheep’s wool insulation with enhanced breathability, resilience, and sustainability.

Wool is a remarkable natural fibre. As sheep’s fleece grows, it naturally absorbs carbon dioxide from the atmosphere. When used as insulation, it binds airborne chemicals that may be harmful, creating a healthier indoor environment. Additionally, installing 100mm CosyWool Slab 370mm is a highly effective way to improve energy efficiency and reduce heating costs in your building.

Looking for the 570mm split version ? Visit Cosywool 570mm Split

Pack Size & Coverage

1. Thickness (mm): 25, 50, 75, 100, 140, 150
2. Model: 140mm Thermafleece CosyWool Slab
3. Board size: 140mm x 370mm
4. Width: 370mm
5. Length: 1200mm
6. Items per pack: 5
7. Total coverage: 2.22 m² per pack
8. Thermal Conductivity 0.038 Wm-1K-1
9. Thermal Resistance: 3.68 W/m K
10. Density: 18 kg/m3
11. Vapour Resistivity: 9 MN·s·g-1m-1
12. Highly Breathable Yes
13. Vapour open:Yes
14. Sound Absorption:NRC 1.05 @100 mm
15. Made from British wool Yes
16. Made in the UK Yes
17. Contains recycled materials 20%
18. Recyclable Yes
19. Manufactured to ISO 9001 and 14001: Yes
20. Carbon Footprint PAS 20250 (60 year life): 0.50kg CO2e for R1
21. Dimensional Stability to EN 1604: Pass
22. Flammability & Smoulder Resistance (BS 5803-4): Pass

Compared to Thermafleece CosyWool Roll, the slab version is denser, offering a snug friction fit in walls and roofs. This density also enhances thermal and acoustic performance, making it ideal for both new builds and retrofit projects.

All Thermafleece British sheep wool insulation products are vapour-open and fully breathable, allowing moisture to be buffered during periods of high humidity and helping to maintain a healthy, comfortable indoor environment.

Key Characteristics

1. Durable and long-lasting insulation, easy to cut and install
2. Safe to handle without gloves or specialist protective equipment
3. Supports a healthier indoor environment by regulating indoor air quality
4. Moisture-regulating and absorbs airborne pollutants, improving indoor comfort
5. Compatible with vapour-permeable underlays for enhanced breathability
6. Highly recyclable and environmentally responsible
7. Safe disposal at the end of its service life
8. Reduces CO₂ emissions over the lifetime of use, supporting sustainable construction
9. Improves acoustic performance with airborne sound reduction up to Rw 40dB

Suitable Applications

• Roofs: Lofts, warm roofs, and pitched roof insulation
• Walls: Timber frame walls and solid masonry walls (internal)
• Floors: Suspended ground floors and intermediate floors

Info

Have a browse of our ThermaFleece Insulation products. We supply to the entire UK Mainland. If you’d like to talk through the suitability of some products for your project, or get a quantity discount quotation please call us by phone on 02039519012 / 02038839057, email sales@insulationstoreonline.co.uk or Live Chat - Lowest UK Insulation Prices near me.