Duotherm Warm Roofs


Duotherm Warm Roofs

The Equus Soprema Duotherm Warm Roof System is a light-weight, thermal roofing system which consists of the DuO two-layer membrane system applied over a rigid thermal PIR insulation board and vapour barrier. This guarantees a continuous and efficient thermal resistance (R-value) as per the New Zealand Building Code, and is designed for use on exposed architectural flat roofs, podium decks, balconies, and terraces. It offers a cost effective, superior, thermal waterproofing system.

Duotherm Warm Roofs provides a hard, stable, UV-resistant, and flexible modified bituminous membrane, finished with pressed coloured natural slates to provide an aesthetically pleasing finish. The roofing system is suitable for both new builds, and roof refurbishments.

The system has been assessed and complies with the New Zealand Building Code, and the DuO Membrane holds a current BRANZ appraisal.

The basesheet and capsheets used for each system are specifically selected based on the requirements of the project, including substrate, weather conditions, and use of the area. These include fully torched, no flame glue, mechanically fastened, and root resistant options.

This system can be used on plywood, concrete and metal substrates.

Key Benefits:

  • Proven UV resistance
  • Guaranteed R value
  • Excellent durability and easy maintenance
  • Light weight system
  • Membrane life expectancy of at least 35 years in NZ climates
  • Mechanically fixed solutions and no flame systems available
  • Green roof systems available
  • Complete roofing solutions available
  • Four available colours – GW, WGG, BO, AGR


GW (Grey/White)
WGG (White/Grey/Green)
BO (Brown Oxide)
AGR (Black)

Technical support provided by our team:

  • Project specific specifications and details
  • Condensation risk analysis provided on every project
  • Wind uplift study provided on every project
  • On-site quality assurance
  • Certified Applicator installation available nationwide
  • Extended Warranties available
  • Total System Warranty available
685 2016 WoB-sq

Why Use Duotherm?

* Superior quality membrane with over 90 years proven performance worldwide.

* A high-tech, slate chip surface offering strong UV resistance and a tidy, aesthetic finish.

* Excellent durability and easy maintenance, with a life expectancy of at least 35 years in all New Zealand climates.

* Backed by a 20-year product warranty when installed in accordance with the product specification and by a certified applicator.

* Each project is independently designed with the use of project specific Condensation Risk Analysis (CRA) and Wind Uplift Studies to ensure the best system available for the buildings requirements.

* Condensation Control – The roofing system moves dew point to the outside of the structure, ensuring there is no condensation build up in the ceiling cavity.

* No condensation = healthier building.

* Due to the fact that there is no condensation build up from the interface of cold and warm air within the roof space, then this negates the need for mechanical venting = less penetrations in the membrane.

* Energy Cost savings are maximized with less need for heating or cooling throughout the building. The system pays for itself over time.

* Creates more space within the ceiling for services.

* Light-weight system, strong and flexible for resistance to seismic movement. 

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