Thermafleece CosyWool 100mm Sheep Wool Roll

Thermafleece CosyWool Sheep's Wool Loft Insulation - 100mm x 370mm

Delivering strong thermal performance at competitive pricing, 100mm Thermafleece CosyWool Sheep Wool Loft Insulation combines 75% natural sheep's wool with recycled fibres. Independent testing demonstrates this formulation achieves superior insulation properties compared to higher wool-content alternatives alone.

Engineered for loft insulation and internal spaces, 100mm CosyWool is straightforward to handle, simple to fit, and designed for durability. The natural wool component actively traps airborne contaminants, fostering improved indoor air quality, whilst its moisture-managing characteristics maintain consistent building performance over time.

This robust, eco-conscious insulation arrives in compressed form, cutting transport emissions by approximately 50%, then fully recovers to working thickness upon installation without affecting thermal properties.

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

Pack Size & Coverage

1. Thickness (mm): 25, 50, 75, 100, 140, 150
2. Model: 100mm Thermafleece CosyWool Roll
3. Board size: 100mm x 370mm
4. Width: 370mm
5. Length: Length: 6.5m
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: 7.22m² per pack
9. Thermal Conductivity 0.039 Wm-1K-1
10. Thermal Resistance: 2.5 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

• 100mm 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

100mm Thermafleece CosyWool suits builders and property owners seeking natural, vapour-permeable, energy-saving insulation that combines comfort, performance, and environmental responsibility for modern UK properties.

Installation & Handling – Thermafleece CosyWool Rolls

100mm Thermafleece CosyWool insulation rolls are non-hazardous and user-friendly, enabling rapid and trouble-free installation. The material causes no irritation to skin, eyes, or lungs, permitting handling without gloves or specialist protective equipment. When installing in confined or inadequately ventilated spaces like lofts, wearing appropriate PPE such as a dust mask is advisable.

To preserve the natural vapour-permeability of the insulation, Thermafleece CosyWool works effectively with a vapour-permeable membrane, promoting moisture management and sound building practice.

Info

Browse our complete ThermaFleece Insulation range. We deliver across the UK Mainland. To discuss product suitability for your application, request a bulk discount, or place an order, contact us on 02039519012 / 02038839057, email sales@insulationbee.co.uk, or use Live Chat for the best UK insulation prices.