150mm CosyWool Sheep Wool Loft Insulation Roll

Thermafleece CosyWool Sheep's Wool Loft Insulation - 150mm x 370mm

Delivering reliable thermal performance and exceptional value, 150mm Thermafleece CosyWool Sheep Wool Loft Insulation combines 75% natural sheep's wool with recycled fibres. Testing demonstrates this formulation achieves superior insulation results compared to higher-wool-content alternatives.

Engineered for loft insulation and internal spaces, 150mm CosyWool handles easily, installs straightforwardly, and provides lasting durability. The natural wool component captures airborne contaminants, fostering improved indoor air quality, whilst its moisture-managing characteristics enhance long-term structural integrity.

This robust, eco-conscious insulation arrives in compressed form, cutting transport emissions by up to 50%, then fully expands to rated thickness upon installation without performance loss.

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

Pack Size & Coverage

1. Thickness (mm): 25, 50, 75, 100, 140, 150
2. Model: 150mm Thermafleece CosyWool Roll
3. Board size: 140mm x 370mm
4. Width: 370mm
5. Length: Length: 4.3m
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: 4.77m² per pack
9. Thermal Conductivity 0.039 Wm-1K-1
10. Thermal Resistance: 3.85 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

• 150mm 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

150mm Thermafleece CosyWool suits builders and property owners seeking natural, breathable, energy-efficient insulation that combines comfort, performance, and environmental responsibility for UK properties.

Installation & Handling – Thermafleece CosyWool Rolls

150mm Thermafleece CosyWool insulation rolls present no hazardous handling concerns and work comfortably during installation, enabling rapid, hassle-free fitting. The material causes no skin, eye, or respiratory irritation, permitting installation without gloves or specialist protective equipment. For enclosed or poorly ventilated spaces including lofts, wearing appropriate PPE such as a dust mask is advisable.

Maintaining the natural breathability of this insulation, Thermafleece CosyWool pairs effectively with vapour-permeable underlays, promoting moisture management and healthy building performance.

Info

Browse our complete ThermaFleece Insulation range. We deliver across the UK Mainland. To discuss product suitability for your project, arrange a bulk discount quote, call 02039519012 / 02038839057, email sales@insulationbee.co.uk or use Live Chat - Lowest UK Insulation Prices near me.