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Home insulation made from sheep wool

Property & Construction

One company is providing a sustainable alternative to traditional home insulation using sheep’s wool


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Spotted: Cooling technologies generated over 1 gigatonne of CO2 emissions in 2022. And at the same time, heating is responsible for over 4 gigatonnes of CO2-equivalent emissions every year. Huge change is needed to reach net zero, and more efficient insulation will play a big part in regulating temperatures inside as climate change makes extreme temperatures more commonplace.

One solution is Thermafleece, which utilises the natural benefits of sheep’s wool to allow homeowners to select a more durable, sustainable, and environmentally friendly insulation.  

Thermafleece is 75 per cent coarse dark wool, a part of sheep’s wool that traditionally goes to waste, and 25 per cent recycled polyester. Because sheep eat plants that have absorbed CO2, wool, itself, also locks up that CO2 from the atmosphere, making Thermafleece’s insulation a form of carbon sequestration.  

Additionally, the compact method by which Thermafleece is transported helps cut down on transport impacts by around 50 per cent, according to the company. The product then expands to normal size when unpacked. Thermafleece also has a house lifetime guarantee which means replacement and repair costs are all alleviated, and the company claims the insulation will pay for itself in saved energy costs in about 4 years. 

Thermafleece is exclusively made in Britain and made with British wool. It is commercially available in various forms such as rolls or slabs, depending on the need of the customer, as well as a separate recycled plastic insulation. 

Springwise has spotted other sustainable and alternative methods of home insulation in the archive, like a construction system made from volcanic glass and cellulose-based insulation made from cardboard.

Written By: Archie Cox



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