Why Permavent was chosen
Permavent APEX air open and vapour permeable membrane was specified for the reroofing of the Castle Street Chambers buildings and the Earl de Grey Pub due to its exceptional suitability for heritage restorations. As a high-performance, breathable roofing membrane, APEX offers superior moisture control, effectively preventing condensation and damp, critical factors in preserving the integrity of historic structures. Its outstanding durability and compatibility with traditional roofing materials make it ideal for maintaining the architectural character of listed buildings while preparing them for modern commercial use. By selecting Permavent APEX, the restoration team ensured that Castle Street Chambers and the Earl de Grey are not only structurally sound and weatherproof, but also fully equipped to meet contemporary standards, all while safeguarding their historic heritage.










