Thermafleece CosyWool

Key Facts

  • Width (mm) – 370, 570
  • Thickness (mm) – 50, 75, 100, 140, 150
  • Thermal Conductivity – 0.039 W/mK
  • Sound Absorption – NRC 1.05 @ 100mm
  • Sound Reduction – Rw 40dB @ 75mm
  • Highly Breathable
  • Made in the UK
  • Contains British Wool
  • Manufactured to ISO 9001 & 14001
  • Can be recycled

Thermafleece CosyWool natural insulation

Versatile insulation rolls rich in British sheep's wool

Thermafleece CosyWool is a versatile insulation rich in sheep’s wool and is the ideal choice if you are looking for all round performance and value for money. Research shows that using 75% wool in combination with recycled fibres outperforms alternative products with a higher percentage of wool. Our wool rich blend ensures you get the full benefit of sheep’s wool with enhanced performance, durability and sustainability.

Thermafleece CosyWool’s convenient compressed form reduces transport impacts by more than 50% compared to other natural insulation and makes it ideal for quick and easy installation. Once unpacked, it regains its original thickness to provide excellent thermal and acoustic performance.

Installing Thermafleece

Thermafleece CosyWool is harmless and can be installed without gloves or protective clothing, although we recommend you wear a dust mask in enclosed spaces such as lofts.  Thermafleece CosyWool  is not irritating to the skin, eyes or respiratory tract.

To retain the benefits of water vapour, absorption and release, Thermafleece CosyWool  may be used in conjunction with a vapour permeable underlay. Protect the insulation from prolonged exposure to sunlight when unpacked and avoid wetting for extended periods, store under cover and clear of the ground. 

Cutting Tips

Thermafleece CosyWool can be cut using a straight edge and a Stanley knife, or simply torn apart.

For more accurate cutting, tightly compress or clamp the insulation between two pieces of solid 15mm board. Overhang the fleece where you want to cut keeping the two board edges aligned. Saw cut the edge using a sharp, scalloped edged knife and keep the blade firm and square against both board edges throughout. Trim any fine remaining fibres with large scissors or shears.

  • Thermal Conductivity: 0.039 Wm-1K-1
  • Density: 18 kgm-3
  • Water Absorption (@100% RH): 30% w/w
  • Specific Heat Capacity: 1800 Jkg-1K-1
  • Mould Resistance: CUAP 2002-01-25: Pass
  • Moth/Beetle Proofing: ISO 3998: Pass
  • Vapour Resistivity: 9 MN·s·g-1m-1
  • Ignition Point: >500oC
  • Spread of Fire to BS 5803-4: Pass
  • Recoverability and thickness, EN 823: Pass
  • Dimensional stability to EN 1604: Pass
  • Can be used to achieve airborne sound reduction of Rw = 40dB
  • GWP (Cradle to Gate): minus 0.2 kgCO2e
  • Embodied Energy (Net of Non-Fossil Feedstock Energy): 7 MJkg-1
  • Recycled Content: 20%
  • Recyclable: Yes

Featured buildings

Bodleian Library Bodleian Library
Edinburgh Castle Edinburgh Castle
Norfolk House Norfolk House
Rise Hall Rise Hall
Scottish National Park Scottish National Park
Design: The Space