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This air-open and vapour-permeable breather membrane is supplied in a 1.5 m x 50 m roll. It is suitable for use with all types of solar panels and meets the underlay recommendations of BS 5534:2014+A2:2018 for pitched roofs and vertical cladding. BBA certified (23/6867), it can be used without roofspace ventilation when combined with air-permeable roof coverings.
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