Thermafleece CosyWool Insulation

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In the quest for sustainable and energy-efficient building materials, Thermafleece CosyWool sheep's wool insulation stands out as a remarkable solution. Made from the natural fibres of British sheep, this versatile sheep's wool insulation not only offers exceptional thermal performance but also provides acoustic insulation amongst a range of additional benefits. Its natural sheep wool composition ensures a hazard-free installation process which does not necessitate the need for protective clothing or a dust mask. 

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What Is Thermafleece CosyWool Insulation?

Thermafleece CosyWool sheep's wool insulation is a highly regarded and effective natural fibre insulation for enhancing the energy efficiency and comfort of buildings. 


Made from the natural fibres of British sheep, this insulation material offers a sustainable and environmentally friendly alternative to synthetic products. 


Thermafleece CosyWool is known for its exceptional thermal performance, providing excellent insulation against heat loss and reducing energy consumption for heating or cooling systems. 

The insulation also boasts remarkable sound absorption properties, contributing to a quieter and more peaceful indoor environment. 

In addition, CosyWool is breathable, allowing moisture to pass through the material while maintaining insulation performance, which helps prevent condensation and mould growth. 

Thermafleece CosyWool Insulation Applications 

  • Between studs in timber frame walls
  • Between rafters in roofs
  • Loft insulation
  • Between and over joists
  • Between joists in a suspended timber floor and in ceilings

Thermafleece CosyWool Insulation Key Features

  • Wool rich blend ensures excellent thermal performance
  • Thermal conductivity – 0.039 W/mK 
  • Sound absorption – NRC 1.05 @ 100mm 
  • Sound reduction – Rw 40dB @ 75mm 
  • Highly breathable acoustic and thermal insulation
  • Made from British wool 
  • Natural insulation manufactured from sheeps wool 
  • Uses 75% wool in combination with recycled fibres
  • Manufactured to ISO 9001 & 14001 
  • Can be recycled


We also stock Thermafleece UltraWool, should your project require it. 

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