Why Permavent was chosen:
Permavent Apex, an air and vapour permeable membrane, was the product of choice on this grand scale commercial project. It was installed to complete the entire full roof refurbishment.
To satisfy the aesthetic requirements, Permavent APEX was specified as a condensation control system which eliminates the need for low or high level ventilation and exceeds the requirements of BS 5534:2014+A2:2018 code of practice for slating and tiling for pitched roofs and BS 5250:2021 Management of moisture in buildings – code of practice.
The integrated double tape system allows APEX to be installed in all UK wind zones and allowing ease of use on such a large round expanse of roof. APEX also provides a secondary barrier to water ingress.