ThermaFleece CosyWool 50mm Sheep Wool Roll

ThermaFleece CosyWool Sheep's Wool Loft Insulation - 50mm x 370mm

Combining natural performance with exceptional value, 50mm ThermaFleece CosyWool Sheep Wool Loft Insulation features a premium blend of 75% natural sheep's wool and recycled fibres. Testing demonstrates this formulation achieves superior thermal properties compared to higher wool-content alternatives alone.

Engineered for loft insulation and internal spaces, the 50mm CosyWool variant installs easily, handles safely, and provides lasting durability. Natural wool fibres actively capture airborne contaminants, fostering improved indoor air quality, whilst its moisture-regulating characteristics enhance structural longevity and performance.

This sustainable insulation arrives in compressed form, cutting transport emissions by up to 50%, then fully expands upon installation without sacrificing thermal effectiveness.

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

Pack Size & Coverage

1. Thickness (mm): 25, 50, 75, 100, 140, 150
2. Model: 50mm ThermaFleece CosyWool Roll
3. Board size: 50mm x 370mm
4. Width: 370mm
5. Length: Length: 13m
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: 14.43m² per pack
9. Thermal Conductivity 0.039 Wm-1K-1
10. Thermal Resistance: 0.64 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

• 50mm natural sheep wool insulation combined with recycled fibres
• Outstanding thermal performance delivering 0.039 W/mK thermal conductivity
• Moisture-regulating capability absorbing up to 30% w/w at 100% RH whilst maintaining performance
• Superior fire resistance with ignition temperature exceeding 500°C
• Non-irritant, breathable, and straightforward to fit
• 18 kg/m³ density providing consistent thermal and acoustic performance
• High specific heat capacity of 1800 Jkg⁻¹K⁻¹ for temperature stabilisation
• Acoustic performance up to Rw 40dB, suitable for acoustic insulation applications
• Delivered compressed to minimise transport carbon footprint

Suitable Applications

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

50mm ThermaFleece CosyWool represents an excellent option for UK property owners and construction professionals seeking natural, vapour-permeable, energy-efficient insulation combining comfort, performance, and environmental responsibility.

Installation & Handling – ThermaFleece CosyWool Rolls

50mm ThermaFleece CosyWool insulation rolls are non-hazardous and straightforward to install, requiring no specialist protective equipment. The material causes no skin, eye, or respiratory irritation, allowing handling without gloves or protective clothing. For enclosed or poorly ventilated spaces such as lofts, wearing appropriate PPE including a dust mask is advisable.

To preserve the natural breathability of the insulation, ThermaFleece CosyWool works effectively with a vapour-permeable underlay, promoting moisture management and healthy building performance.

Info

Browse our full range of ThermaFleece Insulation products. We deliver across the entire 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.