RoofLogic  UltraTherm MSR

Rooflogic Ultratherm MSR is a proven commercial roofing solution  that provides the highest levels of thermal and acoustic performance.


Rooflogic provide a specific system design for each project, nominating components to ensure the installed system meets the requirements of the client.  System performance is assessed in respect to structural, thermal and acoustic performance.  Project specific hygrothermal analysis is also provided to establish that condensation risk is mitigated along with any risk of mould and corrosion within the roof assembly.

The Ultratherm MSR system has been installed throughout New Zealand over the last 6 years and tens of thousands of square metres have been successfully completed.  And feedback from designers and their clients is unanimous - Rooflogic Ultratherm MSR is a durable roof system that provides the highest levels of weather-tightness whilst enhancing thermal and acoustic performance and mitigating condensation risk.

Top Deck S metal roof profile

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Topdeck True Oak Profile on Grafton Hall

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Perforated cassette liner deck

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Top Deck S metal roof profile

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Thermal Performance 

RL PIR Board is used as the insulating core within the Ultratherm MSR system.  RL PIR Board is laid continuously over the liner deck and is unbroken by the building structure maintaining a continuous layer of thermal insulation.  A range of PIR thicknesses are offered to achieve R-values ranging from R2.0 to R5.2.

Management of Condensation Risk

Many traditional roof assemblies fail to effectively manage vapour drive resulting in condensation occurring within the layers of the roof assembly (interstitial condensation.)  The Rooflogic Ultratherm MSR system incorporates a complete vapour control layer that effectively separates the internal and external environment.  A properly detailed vapour control layer in conjunction with the required level of thermal performance will manage the risk of condensation occurring within the roof assembly.  Lower levels of vapour drive that may not create condensation risk can still cause mould growth and corrosion.  Rooflogic hygrothermal calculations assess condensation risk as well as mould and corrosion risk. 


The Ultratherm MSR system allows for early close-in of the structure.  The first process is the installation of the RL Liner Deck and self-adhesive vapour control layer which protects the building interior from the weather providing both programme and health and safety benefits particularly when compared to the cumbersome installation of a traditional built-up metal roof system.


The Ultratherm MSR roof can be installed, flashed and detailed in the same way as any metal roof and in a manner consistent with the Building Code and NZ Metal Roofing Code of Practice.  Because the top skin is a separable component it can be supplied to site, or site run, in precisely the required length from ridge to gutter.  This compares to composite insulated roof panels  that are limited by length and require sealants and non-standard flashing details to try and achieve weather-tightness.

Acoustic Performance

RL Acoustic Board can be added to the Ultratherm MSR assembly to provide enhanced acoustic performance.  Rooflogic have tested a range of assemblies and can provide acoustic data on a their systems.  Introducing a layer of acoustic board can often remove the need for underslung ply or acoustic plasterboard layers for acoustic performance.

Design Flexibility

Range of Top Skin Options 

Whilst our commercial trapezoidal profile, RL Topdeck T, is the most popular profile option, a wide range of profiles are available.  These include concealed clip (RL Topdeck C), sinusoidal (RL True Oak) and standing seam (RL Spanlock.)  Top skin options in terms of base metal and coating can be selected dependent on the exposure zone of the project.

System Integration

The Ultratherm MSR system can be integrated with other Rooflogic systems.  For example, the Ultratherm MSR roof can be detailed in conjunction with an Ultratherm Xtreme membrane roof or gutter assembly to provide robust detailing and continuity of thermal performance and vapour control.

Thermal Performance 

A range of standard PIR board sizes from 40mm to 120mm provides thermal values from R2.0 to R5.3.

Range of liner deck options  

Our standard RL Liner Deck is 0.55mm gauge plain Zincalume.  If the liner deck is going to be left exposed a wide range of coloured liner deck options can be selected.  If the liner deck is required to provide internal acoustic performance (NRC) then a perforated liner with acoustic baffles inserted in to the profile troughs can be selected.  If the liner deck is required to meet specific levels of structural performance then a range of specific profiles and gauge thicknesses can be offered.  Where the liner deck sits within a more aggressive internal environment (eg. Swimming pool) then different base metals, such as aluminium, can be selected in conjunction with the correct fastener type.


 UltraTherm MSR  Projects...