Why Sheep Wool is a Fantastic Insulator

Insulation is one of the best ways to increase energy efficiency to any structure like a Shepherd’s Hut or Living van. It is an important element to insulate well as it can count for up to 35% of heat loss. 

For thousands of years sheep have been using their wool coats to survive the harsh and extreme cold and heat. Like a woolly jumper, sheep wool is very good at regulating temperature. For example, keeping your Shepherd’s Hut cool in summer but warm and cosy in winter. 

The sheep wool is made up of crimped wool fibres, which together form millions of tiny air pockets that trap air, helping to provide a thermal barrier. As a by product of this wool structure it provides a fantastic acoustic performance. 

Thermal conductivity is when heat passes from one side of the material through to the other. This is measured in W/mk. A lower value indicates a better insulator. Sheep wool insulation has a thermal conductivity of between 0.035 to 0.04 K/mk compared to a typical mineral wool insulation with thermal conductivity of 0.044 K/mk. 

By using sheep wool insulation not only is it 100% natural. It’s also sustainable since sheep naturally produce the wool and most of the energy required with producing sheep wool insulation is the washing and cleaning of the wool.

In fact sheep wool requires less than 15% of the energy used to manufacture a typical glass wool product. So, from the sustainable front there is only one winner. 

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