CARLISLE’S RESITRIX bitumen backed EPDM system has helped to deliver a durable roofing solution at a development in St Andrews, which aims to set the standard for sustainable living in Scotland.
The St Andrews West development phase 2 project comprises 16 houses, eight ‘Fisher Flats’ and 38 apartments. The scheme required a waterproofing system for the flat roof areas that aligns with the sustainability goals and aesthetics of the project, while delivering protection against the east coast weather.
Roofing contractor Site Roofing proposed RESITRIX. The firm is experienced in installing RESITRIX for projects in exposed climate conditions, and were confident in recommending the hybrid single ply system.
RESITRIX is described as the only waterproofing membrane that combines the advantages of EPDM’s permanent elasticity with the durability of high-quality polymer-modified bitumen in a single membrane. The self-adhesive membrane can be laid onto almost any substrate. The laps are sealed using hot air welding, reducing risk during the build phase, while providing a service life of over 50 years.
Working collaboratively with CARLISLE, Site Roofing developed the wind loading calculations for the project aligned to the high windspeeds and gusts typical of the location. The company also designed the detailing required for the interfaces between the flat roof areas and the pitched roof sections, working alongside the pitched roofing contractor to enable the project to progress.
RESITRIX is said to boast ‘excellent’ resistance to U/V, is not compromised by fluctuations in temperature, and is suitable for installation in the saline atmosphere of a coastal location like St Andrews.
The flat areas at St Andrews West form link roofs between pitched roof structures, and several dormers within the pitched roofs also needed to be waterproofed using RESITRIX.
Site Roofing coordinated works with the pitched roofing contractor to ensure a ‘smooth programme and seamless finish’, which was particularly crucial as the flat roof areas are visible from ground level, so any imperfection would be noticed.
With multiple trades working on the project at any one time, continued access to the flat roofs was ‘non-negotiable’. RESITRIX’s EPDM and bituminous composition provided a walkable surface throughout the construction phase, allowing the continued progress of a complex programme involving both flat and pitched roof areas, along with other trades.
