In preparation for the works, a full scaffold was erected internally to create a secure working platform underneath the deck to ensure safety and efficiency during each stage of the RAAC removal. In addition, a temporary roof scaffold was installed to protect the building from any adverse weather conditions during the deck removal process.
The 800 sqm project was overseen by the main contractor, RA Edwards & Partners, and Chris Evans assigned the Garland UK Approved Contractor, Alsager Roofing, to perform the roof replacement works once the RAAC was successfully removed.
Meticulous care was taken during the removal of the RAAC deck, working in sections to ensure a smooth transition for the new joists and installing the OSB timber deck.
For the roof replacement, Chris Evans proposed the high-performance two-layer bituminous membrane system, StressPly Flex, with a tapered insulation design to improve the thermal efficiency of the building and mitigate the risk of ponding water in the future. StressPly Flex is BBA certified, fully compliant with UK building regulations and assessed for its weather tightness and service life in excess of 30 years.
The new OSB timber deck would not allow for an open flame torch-on product, so Garland’s Self-Adhesive VCL was used to encapsulate the deck, fully conforming to the NFRC’s Safe2Torch guidance. Once in place, the Garland Ultra-Vent underlay was installed, followed by the StressPly Flex cap sheet.