Designing Dry, Healthy Spaces with Nuralite Waterproofing Membranes

In the middle of the Cardrona Valley sits the ABODO cabin Designed by Justin Wright at Assembly Architects. The unique showroom showcases ABODO’s New Zealand timber offerings and provides a real-life example of how well it can perform in one of the harshest environments in the country.

Uniquely the slatted Vulcan timber screening clads the entire building from roof to base, to form a rain screen. Rain screens are generally used as an exterior surface or a cladding layer to break the force of sideways, wind-driven water movement. This means that any water that gets through the small breaches in the surface loses momentum, which is particularly useful in areas with high rainfall and regular snow.

Nuralite’s, Nuratherm system was specified with the Nuraply 3PM membrane selected to provide a robust two-layer membrane system to cover the entirety of the structure. The cabin was essentially wrapped with membrane and was made watertight against the elements.

Within the Nuratherm system, 100mm of Polyisocyanurate (PIR) Insulation was selected to provide a high level of insulation. This was an important design consideration as the temperatures in the South Island fluctuate a considerable amount during the winter and summer months. With an R-value of 4.5 (EN 13165), the rigid insulation boards were placed outside the structure to ensure there was a continuous layer of insulation, eliminating thermal bridging.

To maintain building airtightness and prolong the life of the Nuratherm system, a self-adhered, self-sealing aluminium vapour blocker was also selected.

The finished product shows how thoughtful design and high-quality building materials can enhance a building’s performance and make it comfortable in even the harshest of environments.

Nuralite Nuratherm

The Nuralite Nuratherm system puts the insulation where it should be, above the substrate and outside the structure, to completely enclose the internal spaces with an airtight and highly efficient “Outsulation” blanket. With 30–35% of heat lost through the roof of an uninsulated house, and 18–25% through the walls, the Nuratherm insulated system optimises energy efficiency.

The Nuralite Nuratherm system can be installed on timber, concrete, or for real cost effectiveness, metal substrates, on new or existing buildings and on flat roofs with a final construction fall as low as 1:80 (0.730).

Key features:

Optimises energy efficiency
Improves insulation with no thermal breaks
Improves airtightness
Ventilation of ceiling void not required
Can be retrofitted on existing buildings
CodeMark certified for ease of consent

Click here to read the full Cardrona Cabin case study

Nuratherm Warm Roof System

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The Nuratherm system puts the insulation where it should be, above the substrate, to completely enclose the roof area with a highly efficient insulation blanket.

The Nuraply Nuratherm System has been appraised by BRANZ for use as an insulating roof on buildings within the following scope:

the scope limitations of NZBC Acceptable Solution E2/AS1, Paragraph 1.1 with regards to building height and maximum floor plan areas; and,
on limited access flat roofs with concrete, timber or steel structural decks subject to specific structural design; and,
with roofs constructed to drain water to gutters and drainage outlets complying with the NZBC; and,
with roofs constructed to suitable falls (Refer Paragraph 15.3 and 15.4); and,
with no integral roof gardens; and,
situated in NZ3 3604 Wind Zones, up to, and including 'Extra High'.

The Nuraply Nuratherm System has also been appraised for durability and thermal performance as an insulated roofing system on buildings that are the subject of specific design with no building height restriction. Building designers are responsible for the building design and for the incorporation of the Nuraply Nuratherm System into their design in accordance with the declared properties and instructions of Nuralite Waterproofing Ltd.

In the opinion of BRANZ , the Nuraply Nuratherm System, if designed, and used, installed and maintained in accordance with with the statements and conditions of Appraisal No.732 (2012), will meet the following provisions of the NZBC:

Clause B2 Durability: Performance B2.3.1(b), 15 years. Nuraply Nuratherm System meet this requirement
Clause E2 External Moisture: Performance E2.3.1 and 2.3.2. Nuraply Nuratherm System meet these requirements
Clause F2 Hazardous Building Materials: Performance F2.3.1. Nuraply Nuratherm System meet this requirement and will not present a hazard to people
Clause H1 Energy Efficiency: Performance H1.3.1(a). The Nuraply Nuratherm System will contribute to meeting this requirement

Nuraply Nuratherm System is appraised as an Alternative Solution in terms of New Zealand Building Code compliance.

BRANZ Appraised

Nuraply 3PM

Nuralite

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Nuraply 3PM is used for waterproofing flat roofs or decks protected with timber or tiles.

Suitable for light maintenance foot traffic
Roof Solutions — suitable for installing over plywood, concrete or Nuratherm insulated roof substrates
Deck Solutions — waterproofing for decks, gutters, terraces and canopies

In the opinion of BRANZ , the Nuraply Roof and Deck Membranes, if designed, and used, installed and maintained in accordance with with the statements and conditions of Appraisal No.547 (2014), will meet the following provisions of the NZBC:

Clause B2 Durability: Performance B2.3.1(b), 15 years. Nuraply Roof and Deck Membranes meet these requirements.
Clause E2 External Moisture: Performance E2.3.1 and 2.3.2. Nuraply Roof and Deck Membranes meet these requirements.
Clause F2 Hazardous Building Materials: Performance F2.3.1. Nuraply Roof and Deck Membranes meet these requirements and will not present a hazard to people.

Nuraply Roof and Deck Membranes have been appraised as an Alternative Solution in terms of New Zealand Building Code compliance.

BRANZ Appraised

CodeMark

Enertherm PIR Insulation Boards

Nuralite

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Enertherm PIR is a 100% CFC, HCFC or HFC-free insulation board with a rigid polyisocyanurate foam core, clad on both sides with a multi-layer gas-tight aluminium complex.

Enertherm boards can be installed over plywood, concrete or metal substrates, on new or existing buildings and on flat roofs with a minimum 1:30 slope.

IKO Enertherm ALU Insulation is installed as part of the Nuratherm System.

In the opinion of BRANZ, the Nuraply Nuratherm System if designed, and used, installed and maintained in accordance with with the statements and conditions of Appraisal No.732 (2012), will meet the following provisions of the NZBC:

Clause B2 Durability: Performance B2.3.1(b), 15 years. Nuraply Nuratherm System meet these requirements.
Clause E2 External Moisture: Performance E2.3.1 and 2.3.2. Nuraply Nuratherm System meet these requirements.
Clause F2 Hazardous Building Materials: Performance F2.3.1. Nuraply Nuratherm System meet these requirements and will not present a hazard to people.
Clause H1 Energy Efficiency: Performance H1.3.1(a). The Nuraply Nuratherm System will contribute to meeting this requirement.

Nuraply Nuratherm System have been appraised as an Alternative Solution in terms of New Zealand Building Code compliance.

BRANZ Appraised

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