RESITRIX®, the hybrid EPDM waterproofing membrane from CARLISLE® with a durable bituminous layer provided an ideal solution for both the blue roof areas, and the warm roofs with solar PV.

The blue roof areas provide approximately 3000m³ of rainwater attenuation, with temporary and permanent retention volumes. EPDM has now been certified to provide a service life in excess of 70 years by SKZ, ensuring that RESITRIX® met the project’s need for high performance waterproofing and robust load bearing for an extended service life. Requiring no hot works, the self-adhesive RESITRIX® membrane also offers excellent root resistance and contains no harmful plasticisers that could jeopardise the planting.

The roof build-up included the CARLISLE® Alutrix 600 vapour barrier membrane, which was installed directly onto the substrate, providing protection from water vapour ingress along with an air-tight layer for additional thermal performance. The fully-bonded RESITRIX® SK W EPDM self-adhesive single ply membrane was installed directly onto the insulation layer prior to the blue roof layer and planting.

The same roof build-up was installed for the roof areas with solar PV panels. The solar PV was installed as ballasted infrastructure to avoid any need to use fixings that penetrate the RESITRIX® membrane. In addition to providing an effective waterproof covering, RESITRIX® also provided a robust roof covering able to withstand the weight of the solar PV as well as foot traffic from maintenance teams.

• Project: Tynecastle High School (McLeod Street student residence)

• Client: University of Edinburgh

• Architect: Michael Laird Architects (MLA)

• Roofing Contractor: Site Roofing
  
  Material:
  

• RESITRIX® SK W EPDM hybrid self-adhesive single ply membrane

• Alutrix 600 vapour barrier membrane