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New Age Roofing Membrane Saves Time, Money and the Environment

A world-class resort on Victoria’s famous Great Ocean Road was facing  major disruptions and loss of bookings due to a seriously degraded roofing membrane causing leaks in a number of its penthouses and apartments.

The Cumberland Lorne Resort, in one of the most popular holiday destinations in regional Victoria, was built in the late ‘80s and featured a torch-on membrane applied to its concrete roof that had been repaired on numerous occasions with a liquid applied membrane – all with limited success.

Remedial specialists had advised the resort to remove the existing membrane, clean the concrete roof and then apply a liquid membrane to resolve the ongoing issue with leaks.

Full Stop Waterproofing, contracted to carry out the remedial work, surveyed the 550 square metre roof and its ocean-front location and advised the proposed roof refurbishment would take 6-8 weeks to complete, cause major disruption to guests with potential loss of bookings and could only be completed during the summer months due to overly wet weather conditions at other times of the year.

In consultation with ARDEX Australia, Full Stop Waterproofing recommended the new generation ARDEX TPO sheet roofing membrane, a faster and more effective solution with significantly reduced costs and environmental advantages.

ARDEX WPM 615 TPO is a high performance waterproofing membrane of thermoplastic polyolefin combining polypropylene and ethylene propylene rubber.  The scrim-reinforced membrane combines the durability of rubber with the heat welding properties of a thermoplastic in a flexible sheet. It is hot-air welded to deliver a fully secure, consistent seam quality. 

In addition, all penetrations and corners of the roof area are made easier to complete with this system by virtue of the ARDEX TPO pre-formed corners and boots.

The TPO membrane comes in 30 metre sheets, two metres wide and weighs just 1.53kg per square metre.  This delivers easier handling than most other waterproofing membranes and a variety of installation options for low slope roofing applications in both refurbishment and new construction projects.

The fact that the membrane offers single ply protection with fast, hot air welded seams delivers a rapid, safe (no naked flames) installation process.

The refurbishment of the Cumberland Lorne Resort took just three weeks with a team of two to three as compared to the potential two months the initially specified liquid membrane application would have taken.

Environmentally the TPO waterproofing membrane has some definite advantages – its chlorine-free, non-halogenated and plasticizer-free formulation, in combination with the hot-air welded seaming method, produces no environmentally harmful emissions.  The membrane can also be easily recycled and has a lower manufacturing footprint than comparable systems.

A further advantage of the ARDEX TPO is that the white colour of the product creates a heat-reflective index of over 70 per cent – and a high proportion of this index is retained for the lifetime of the membrane due to its colour-fast retention properties.

Lee Gordon, general manager of Cumberland Lorne Resort, is impressed with the product’s ease of use and versatility.  “The fact that the application process was both fast and could continue irrespective of weather conditions was a major influence in our decision making – the ARDEX TPO saved on installation costs but also minimised any disruption to our business,” said Mr Gordon. 

For more information on the ARDEX TPO system please contact the ARDEX technical hot line on 1800 224 070 or email

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