140mm Thermafleece CosyWool Wool Roll 570mm

Thermafleece CosyWool Sheep's Wool Loft Insulation - 140mm x 570mm

This 140mm Thermafleece CosyWool Sheep Wool Loft Insulation combines 75% natural sheep's wool with recycled fibres to deliver superior thermal performance and exceptional value. Independent testing confirms this blend outperforms products with higher wool percentages alone.

Engineered for loft insulation and internal applications, the 140mm CosyWool roll is straightforward to fit, safe to handle, and built for durability. Natural wool fibres actively trap airborne contaminants, promoting better indoor air quality, whilst its moisture-regulating capabilities ensure sustained building performance over time.

This sustainable insulation arrives in compressed form, cutting transport emissions by up to 50%, then expands to full thickness upon installation.

Looking for the 370mm split version? Visit Cosywool 370mm Split

Pack Size & Coverage

1. Thickness (mm): 25, 50, 75, 100, 140, 150
2. Model: 140mm Thermafleece CosyWool Roll
3. Board size: 140mm x 570mm
4. Width: 570mm
5. Length: Length: 4.6m
6. Roll Lengths: 12.0m (25mm) 13.0m (50mm), 8.5m (75mm), 6.5m (100mm), 4.6m (140mm), 4.3m (150mm)
7. Items per pack: 1
8. Total coverage: 5.24 m² per pack
9. Thermal Conductivity 0.039 Wm-1K-1
10. Thermal Resistance: 3.59 W/m K
11. Density: 18 kg/m3
12. Vapour Resistivity: 9 MN·s·g-1m-1
13. Highly Breathable Yes
14. Vapour open:Yes
15. Sound Absorption:NRC 1.05 @100 mm
16. Made from British wool Yes
17. Made in the UK Yes
18. Contains recycled materials 20%
19. Recyclable Yes
20. Manufactured to ISO 9001 and 14001: Yes

Key Features & Benefits

• 140mm Natural sheep wool insulation blended with recycled fibres
• Excellent thermal performance with thermal conductivity of 0.039 W/mK
• Moisture regulating - absorbs up to 30% w/w at 100% RH without losing performance
• High fire resistance with an ignition point above 500°C
• Safe and comfortable to install, non-irritant and breathable
• 18 kg/m³ density for reliable thermal and acoustic performance
• High specific heat capacity of 1800 Jkg⁻¹K⁻¹, helping to stabilise indoor temperatures
• Airborne sound reduction up to Rw 40dB, ideal for acoustic insulation
• Supplied compressed to reduce carbon impact during transport

Suitable Applications

• Loft insulation
• Floors above DPC
• Timber frame and solid walls (internal)
• Warm roofs
• Acoustic insulation projects

Thermafleece CosyWool suits builders and homeowners seeking natural, breathable, energy-efficient insulation that combines comfort, performance, and environmental responsibility for modern UK properties.

Installation & Handling – Thermafleece CosyWool Rolls

Thermafleece CosyWool insulation rolls are non-hazardous and pleasant to install, enabling quick and easy fitting. The material causes no skin, eye, or respiratory irritation, permitting installation without gloves or specialist protective equipment. When working in enclosed or poorly ventilated spaces such as lofts, wearing appropriate PPE including a dust mask is advisable.

To preserve the natural breathability of this insulation, pair 140mm Thermafleece CosyWool with a vapour-permeable underlay, enhancing moisture management and building durability.

For optimal results, keep insulation covered and elevated before use. After unpacking, shield it from direct sunlight, rain, or dampness to maintain its thermal and acoustic qualities.

Info

Browse our complete ThermaFleece Insulation range. We deliver across the UK Mainland. For project suitability advice or bulk quotations, contact us on 02039519012 / 02038839057, email sales@insulationbee.co.uk or use Live Chat - Lowest UK Insulation Prices near me.