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Thermafleece CosyWool Roll is a versatile, wool rich, natural and breathable insulation which is easy to install between and over joists and perfect for floors and lofts.

CosyWool rolls come in a compressed form that reduces transport impacts by more than 50% and makes it ideal for quick and easy installation. Once unpacked, it regains its original thickness to provide excellent thermal and acoustic performance.

A ‘breathable’ product, wool absorbs and releases moisture from the air in your home through millions of naturally occurring air pockets, thereby keeping your home warm in winter and cool in summer. Wool also helps to regulate humidity levels during cold, wet winter days and nights, so improving the air quality of your home and going some way to reduce condensation.

CosyWool Rolls are available in packs of either 2, 3 or 4 rolls which are easy and safe to store and handle. CosyWool complies with all British building and fire regulations.

All of our Thermafleece products are harmless and can be handled without gloves or protective clothing, although we would always recommend wearing a dust mask in an enclosed space such as a loft.
Thermafleece CosyWool is not irritating to the skin, eyes or respiratory tract.

Key Facts:

  • Width (mm) – 370, 570
  • Thickness (mm) – 50, 75, 100, 140, 150
  • Manufactured to a nominal density of 18kg m3
  • 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
  • Smoulder resistance and spread of flame to BS5803-4 -pass
  • Can be recycled

Thermafleece from Eden Renewable Innovations Ltd is the UK’s first British Sheep’s wool insulation and the leading brand of natural and sustainable insulation in the UK. Thanks to over seventeen years of research and development thermafleece products uniquely combine natural and recycled fibres at their optimum proportions and density, so ensuring all our wool insulation meets the highest demands of traditional and modern construction.

Behind our success is a commitment to sustainable building and an uncompromising approach to performance, quality and service. We pride ourselves in offering the highest quality products, industry leading technical support, first class customer service and an honest and informative approach to sustainability.

Thermafleece, is odourless, soft, warm to the touch and easy to handle – think of the wrapping your house in the warmest of duvets in the snowiest of weather.

Eden Renewable Innovations Ltd is a privately owned company based in the heart of the UK’s Lake District. This helps us see first-hand what nature has to offer and to appreciate how important it is to make the best use of our home-grown resources.

Our company is an integral part of the local community and our entire team is dedicated to ensuring our business is run along ethical and sustainable lines paying close attention to our commercial, environmental and social responsibilities in equal measure.


Proud to exhibit at the Homebuilding & Renovating Shows. Thermafleece's comprehensive range of thermal and acoustic insulation is rich in home-grown natural fibres. Thanks to fifteen years of research and development they are proud to offer products that uniquely combine natural and recycled fibres at their optimum proportions and density. This ensures all their wool, hemp and recycled insulation meets the highest demands of traditional and modern construction.