ultratherm xtreme, Ultratherm msr


beech st queenstown


warren and mahoney


december 2016




Project Description

81-85 Beach Street is a new commercial development in the centre of Queenstown.  The complexity of the site requires the roof areas to be carefully considered, resolved and detailed.


The project required the installation of both insualted metal and membrane roof systems from Rooflogic.  Rooflogic’s insulated metal roof system with an architectural standing seam finish was specified for the pitched roof areas whilst the flat roof and gutter areas were specified in Rooflogic Ultratherm Xtreme system with Derbigum membrane.  The success of the project was in the careful detailing and installation of the two systems ensuring that the junctions between insulated metal and insulated membrane roof areas were well resolved.

The Rooflogic membrane system was installed over structural plywood and incorporated:

  • RL Vapour Control Layer.

  • RL PIR Board (80mm.)

  • RL Roof Board HD.

  • Derbigum Membrane.

The Rooflogic metal system incorporated:

  • RL Vapour Control Layer.

  • RL Acoustic Board.

  • RL PIR Board (80mm.)

  • RL Spanlok standing seam profile.

SYSTEM benefits

  • Well resolved junctions between insulated metal and membrane roof areas ensuring that continuity in respect to thermal performance, vapour control and weather-tightness is maintained.

  • Extreme performance of Derbigum membrane.

  • RL Roof Board HD provides highly trafficable surface.

  • Full hygrothermal analysis done to ensure that there was no condensation risk.

  • Verified levels of acoustic performance to meet project brief.

  • Fully engineered structural scheme complete with PS1 supplied by Rooflogic.

Rooflogic Limited

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39 Hautonga Street 


Ph. 04 475 7663