Bat Friendly Roof Breather Membrane

This contractor has implemented a bat-friendly breather membrane for the roof.

Bats are a protected species in the UK and play an important role in the ecosystem. Until now when bats are found, only Bitumen 1F felt has been used. This has come at considerable cost to the thermal performance of the roof because 1F felt requires extra rafter space if insulation is used; in old buildings this is often not possible.

Properties with an uninsulated 1F felt roof can release up to 10 tonnes of CO2 per year. Replacing 1F felt with a breathable membrane and additional insulation between the rafters can improve thermal performance by 87% and reduce CO2 emissions by 57%.

These factors have a large impact on global warming and climate change.

This bat-friendly breather membrane has passed the Snagging Propensity test for Roofing Membranes developed by university academics, Statutory Nature Conservation Organisations and The Bat Conservation Trust. Using this product in place of traditional materials will help the construction industry reduce emissions, improve thermal performance and protect significant bat species.

To find out more, click the link below.

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Footer Reference

Monitor Report. Lovell Partnerships. London. June 2025.


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