Wernesgrüner, a brewery which has been commercializing one of the most popular beers in Germany since 1436, launched a vast renovation program for the roof of its loading hall. The roof of this building, located at the company headquarters in Wernesgrün, consisted of a vapor barrier, a 100 mm thick layer of mineral wool insulation and a PVC roofing membrane.
After 20 years of service, the existing roofing system had reached the end of its life cycle. For the renovation, the building owner called on roofing contractor Spenglerei Marcel Möckel. Their only requirement: that the PVC roofing membrane had to be replaced by a thermoplastic one.
The roofing contractor had been working for several years with Firestone Building Products and had done many projects, both new build and renovation, but so far only with Firestone’s RubberGard™ EPDM roofing system.
"The installation of the Firestone UltraPly™ TPO roofing system in this project was a first for us” said the head of Spenglerei Marcel Möckel. “Regular exchanges with the Firestone team and their support throughout the project were very reassuring," he added.
During the design phase, Firestone provided detailed calculations on the wind load, advised the replacement of the existing insulation on the eaves and proposed an extended manufacturer warranty. The support continued on site: a Firestone technician assisted the roofers during the first few days and gave them valuable practical advice on the manipulation of the membrane and its installation in the common part and around details. The regional Firestone sales manager was also present throughout the project to ensure that both roofing contractor and building owner were satisfied with the solution.
After installing additional PIR insulation, 1250 m² of Firestone UltraPly™ TPO 1.5 mm membrane were mechanically fastened to the roof. Rolls of 1 m wide were used in this project, as this small dimension was favored following the calculation of the wind loads. The weldability of the joints with hot air ensured a cost-effective and fast installation, which was completed in 2 weeks.