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Natural insulation

Sheeps Wool Insulation

Sheep Wool Insulation
Thermafleece Natural insulation
Thermafleece Natural insulation
Thermafleece Natural insulation Thermafleece Natural wool insulation Thermafleece Natural wool insulation wall application

Product Stats


  • Thermafleece Cosywool - Rolls of 370mm wide
  • Manufactured to ISO 9001 quality and ISO 14001 environmental management standards.
  • Components 75% Sheep Wool, 15% recycled polyester and 10% polyester binder with a high recycled content.
  • Bulk Density - approx. 25 kg/m3
  • Thermal conductivity – 0.039 W/mK
  • Specific Thermal Capacity - 1800J/(kg.k)


  • Roofs – Loft & warm roof 
  • Walls – Timber frame & solid (internal) 
  • Floors – All levels above DPC 
  • Acoustic – Walls, floors & roofs

Special Offer - Coverage 

  • 100mm x 370mm - 64.98m2 (9 Pack Special Offer) 
  • 140mm x 370mm - 45.99m2 (9 Pack Special Offer) 

(FREE Delivery) 

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THERMAFLEECE Cosywool is a wool based insulation roll that is quick and easy to install. It contains 75% Sheep’s wool, 15% recycled polyester and 10% polyester binder with a high recycled content.

THERMAFLEECE Cosywool is available in a conveniently compressed form that significantly reduces transport impacts. Once unpacked, it regains its original thickness to provide effective thermal insulation. Like all THERMAFLEECE products, it is long-lasting, safe to handle and contributes to a healthier indoor environment by regulating moisture and absorbing harmful airborne substances in the home.

Thermafleece Cosywool has a thermal conductivity of 0.039W/mK and is available in a variety of dimensions suitable for all your application needs. Thermafleece Cosywool is supplied in roll form with a thickness of 50mm, 75mm 100mm and 140mm and is also available in two widths, 370mm and 570mm.


  • 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

Why Insulate With Thermafleece CosyWool Roll?

Insulating a property will significantly reduce the amount of energy lost from the building envelope, reducing energy consumption and carbon dioxide released to the atmosphere.


Thermafleece CosyWool Roll is designed to minimise up-front cost making wool based insulation more affordable to a wide range of end users. What’s more, the energy it saves means Thermafleece CosyWool Roll quickly pays for itself.

Long Lasting

Thermafleece CosyWool Roll contains a lofting agent to maintain durability, fibre stability and structural integrity creating a long lasting insulation.

Quality Assured

Thermafleece CosyWool Roll is manufactured and supplied in accordance with ISO 9001 quality and ISO 14001 environmental management systems.


Thermafleece CosyWool Roll can reduce CO2 emissions by many tonnes over the lifetime of use. What’s more, wool fixes carbon dioxide helping reduce greenhouse gas levels.


Insulating with breathable natural fibres can contribute to more stable humidity and moisture levels within buildings. This can help improve the health of the building and the occupants.


Thermafleece CosyWool Roll is safe to handle and can be recycled or safely disposed of at the end of its life.

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