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A great choice for insulating walls and roofs, CosyWool Slabs are manufactured from 75% British sheep wool combined with recycled polyester fibres. The slabs are flexible and slightly denser than rolls, designed to tightly friction fit in walls and roofs providing excellent thermal and acoustic performance.

The wool rich blend ensures you get the full benefit of sheep’s wool with enhanced thermal and acoustic performance, durability and sustainability. The lofting agent maintains durability, fibre stability and structural integrity creating a long lasting insulation.

CosyWool is odorless, soft, warm to the touch and easy to handle. You can install it yourself and it does not need to be replaced once in situ.

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

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

Key Facts:

Width (mm) – 390, 590

Thickness (mm) – 50, 75, 100, 140

Thermal Conductivity – 0.038 W/mK

Manufactured to a nominal density of 22kg m3

Highly Breathable

Made in the UK

Contains British Wool

Manufactured to ISO 9001 & 14001

Complies with fire resistance BS5803-4 (smoulder resistance and spread of flame)

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.