Quick Answer
Wool insulation has a lower environmental impact compared to synthetic insulation due to its natural, biodegradable properties and reduced production carbon footprint. Synthetic insulation, on the other hand, is made from non-renewable resources and contributes to microplastic pollution. Natural wool insulation also requires less energy to produce.
Environmental Impact of Wool Insulation
Wool insulation is a natural, renewable resource that can be sourced from sheep. It is biodegradable and compostable, reducing the risk of microplastic pollution. According to a study by the Woolmark Company, sheep farming generates 0.3 kg of CO2e per kilogram of wool produced, compared to 2.5 kg of CO2e per kilogram of polyester produced. Wool insulation also requires less energy to produce, with an average energy consumption of 2.5 MWh per kilogram, compared to 13.5 MWh per kilogram for polyester.
Environmental Impact of Synthetic Insulation
Synthetic insulation, on the other hand, is made from non-renewable resources such as petroleum and natural gas. The production of synthetic insulation contributes to greenhouse gas emissions, with an average carbon footprint of 2.5 kg of CO2e per kilogram of polyester produced. Synthetic insulation also contributes to microplastic pollution, with a study by the University of Plymouth finding that up to 85% of synthetic fleece can break down into microplastics within 24 months.
Production and Disposal of Insulation
The production and disposal of insulation also have significant environmental impacts. Synthetic insulation is often produced with a non-woven technology that generates excess fibers and waste, contributing to microplastic pollution. Wool insulation, on the other hand, can be composted at the end of its lifespan, reducing waste and the risk of microplastic pollution.
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