75mm ThermaFleece CosyWool Wool Roll 370mm

ThermaFleece CosyWool Sheep's Wool Loft Insulation - 75mm x 370mm

Combining natural performance with exceptional value, this 75mm ThermaFleece CosyWool sheep wool roll features a carefully formulated blend of 75% natural wool and recycled content. Independent testing confirms this composition delivers superior thermal performance compared to higher wool-content alternatives.

Engineered for loft insulation and internal spaces, this 75mm product is straightforward to fit, pleasant to handle, and built for durability. The natural wool fibres actively trap airborne contaminants, promoting better indoor air quality, whilst its moisture-regulating capacity ensures sustained structural performance.

This sustainable insulation arrives compressed to minimise transport emissions by approximately 50%, expanding fully upon installation without any loss of thermal effectiveness.

Looking for the 570mm split version? Check out CosyWool 570mm Split

Pack Size & Coverage

1. Thickness (mm): 25, 50, 75, 100, 140, 150
2. Model: 75mm ThermaFleece CosyWool Roll
3. Board size: 75mm x 370mm
4. Width: 370mm
5. Length: Length: 8.5m
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: 9.44m² per pack
9. Thermal Conductivity 0.039 Wm-1K-1
10. Thermal Resistance: 1.88 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

• 75mm natural sheep wool insulation combined with recycled fibres
• Outstanding 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

This 75mm ThermaFleece CosyWool product is an excellent option for UK property owners and construction professionals seeking natural, breathable, energy-efficient insulation that combines comfort, performance, and environmental responsibility.

Installation & Handling – ThermaFleece CosyWool Rolls

This 75mm insulation roll is non-hazardous and pleasant to work with, ensuring swift and simple installation. The material causes no skin, eye, or respiratory irritation, permitting handling without gloves or specialist protective equipment. For work in enclosed or poorly ventilated spaces such as lofts, wearing appropriate PPE including a dust mask is advised.

To preserve the natural breathability of this product, it can be fitted with a vapour-permeable underlay, enhancing moisture management and supporting healthy building performance.

Info

Browse our full range of ThermaFleece insulation products. We deliver across the UK Mainland. For advice on product suitability, project specifications, or bulk pricing, contact us on 02039519012 / 02038839057, email sales@insulationbee.co.uk or use Live Chat - Competitive UK Insulation Prices.