Roof Build Up

The project has been constructed with building performance and sustainability in mind. The RESITRIX®  hybrid EPDM roofing system, HERTALAN® and ARBO® tapes used for the building envelope play a key role in achieving those performance and sustainability goals. The RESTRIX® roofing membrane provides robust and hardwearing waterproofing protection for the roof, which has been planted with birch trees. While the HERTALAN® and HARDCAST® sealing tapes, ensure an airtight and fire safe façade.

The building has been constructed as a double-curved sphere, composed of prefabricated concrete elements, with each ‘ring’ comprising 64 panels. The building’s radius measures 40 meters at the base and 60 meters at the roof level. Ensuring compliance with safety regulations and achieving air and water tightness for the building required innovative solutions and, from the concept stage, RESITRIX® EPDM roofing membrane was specified as a high-performance, root-resistant waterproofing system, compatible with the vision for a verdant forest of 75 birch trees on the roof.

Façade sealing

The musuem's poured concrete building envelope, which was insulated with a rain screen insulation board, needed to be made airtight to protect against fire penetration. All horizontal and vertical seams between insulation boards were sealed using ARBO® fire tape from Carlisle’s façade system range, which is certified as fire class B, S1 for smoke emission, and D0 for droplet formation.

Finally, Carlisle’s HERTALAN® Easy Stick GS, a long lasting EPDM strip, with fibreglass reinforcement and a self-adhesive butyl underlay, was used to seal all the façade details. This self-adhesive EPDM strip has a µ value of 170,000, which makes it virtually airtight and watertight; an ideal solution for sealing the building beneath the mirrored façade panels.