ThermaFleece CosyWool 140mm Flexible Slab

140mm ThermaFleece CosyWool Slab is a flexible, high-performance insulation solution delivering comprehensive thermal and acoustic benefits at competitive pricing.

Constructed from a wool-rich fibre blend that is thermally bonded, this 140mm slab provides durability and sustained stability without sagging. Testing demonstrates this blend performs comparably to higher wool-content alternatives, delivering the thermal advantages of 100mm sheep's wool insulation alongside superior breathability, resilience, and environmental credentials.

Wool represents an exceptional natural material. As sheep's fleece develops, it naturally captures carbon dioxide from the air. When incorporated into insulation, it traps airborne contaminants that could affect health, fostering a cleaner indoor atmosphere. Fitting 140mm CosyWool Slab 370mm substantially enhances building energy performance and lowers heating expenditure.

Looking for the 570mm split option? Check out 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

In comparison to ThermaFleece CosyWool Roll, the slab format is more densely packed, providing a secure friction fit within wall and roof cavities. This increased density also strengthens thermal and acoustic performance, making it suitable for both new construction and renovation applications.

Every ThermaFleece British sheep wool insulation product is vapour-permeable and completely breathable, enabling moisture management during high-humidity conditions and supporting a balanced, pleasant interior climate.

Key Characteristics

1. Resilient and stable insulation, straightforward to trim and fit
2. Safe to handle without protective gloves or specialist safety gear
3. Fosters a healthier indoor setting by managing air quality
4. Regulates moisture and captures airborne particles, enhancing indoor conditions
5. Works effectively with breathable underlays for improved air permeability
6. Extensively recyclable and environmentally sustainable
7. Responsible end-of-life disposal options available
8. Lowers CO₂ emissions throughout its operational lifespan, advancing eco-conscious building
9. Strengthens acoustic performance with airborne noise reduction 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

Explore our full range of ThermaFleece Insulation options. We deliver across the UK Mainland. For advice on product suitability for your specific project or to request a bulk discount quotation, contact us on 02039519012 / 02038839057, email sales@insulationbee.co.uk or use Live Chat - Competitive UK Insulation Pricing.