Providing a Unique Warm Roof Solution on a Greenhithe Hidden Gem

Hidden amongst the bush of the Greenhithe hills sits The Knoll, a contemporary home many years in the making. Originally bought in the 1950s, the land that the modern abode now sits on was purchased by the owner's grandfather.

In a prime location, the site has an unobstructed view of the Waitemata harbour, privacy in the form of native bush and close proximity to the Upper Harbour Highway. Hoping to transform their lot of paradise into the Frank Lloyd Wright-inspired house of their dreams, they enlisted the skills of Megan Edwards Architects to bring it to life.

Wanting a symbiosis between the land and the structure, the architect sought to create a sanctuary away from the hustle and bustle of the city life in the form of a family retreat. With muted earth tones, strong lines and sustainable materials, The Knoll began to come to life.

Nuralite were brought on board to provide a low-profile roofing solution for the project. As the roof could clearly be seen from the driveway, the request was made to have an aesthetically pleasing roof line and use materials that were attractive and durable.

Using a Nuratherm Warm roof system and tapered boards for the roof edges, a unique curved look was achieved. With an R-value of 4.5, the 100mm PIR boards ensured there were no thermal breaks in the roof and provided efficient thermal performance throughout.

Being energy conscious and sustainably-minded was an integral part of the design from Megan Edwards. Products were chosen because of their longevity and ability to futureproof the home. The owners wanted to save on power usage and heating costs every year, so selecting a Nuratherm Warm roof meant they could maintain a steady internal temperature and rely less on electricity to heat and cool the building.

Nuraply 3PT/3PTM was also specified for the tanking and footings on the project. The block wall waterproofing ensured that there was no water ingress through the basement as the house was built into the hill, using the right tanking systems meant the house was watertight underneath as well as on top.

Surrounding the home, the owners also wanted a large deck to wrap around the front and sides. Nurajack decking pedestals were used in combination with tiles create the perfect space for outdoor entertaining.

Nuralite was happy to work with the architect and provide a range of suitable solutions for The Knoll. With their waterproofing, insulation and decking systems, Nuralite offer technical advice and bespoke detailing with no project too big or small.

Applicator: Lee Gallagher
Architect: Megan Edwards Architects

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

Nuraply 3PT/3PTM

Nuralite

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Nuraply 3PT Tanking System is a positive waterproofing system that is watertight immediately upon installation.

Nuraply 3PT(M)systems have been developed for positive long-term, low maintenance waterproofing of construction features such as:

Foundations
Basements
Lift Shafts and pits
Underslab

Nuraply 3PT(M) provides a robust watertight solution for areas where water is likely. The system can tolerate some hydrostatic pressure but specific design is required for areas of high hydrostatic pressure such as large building sites by the sea.

Based on expert opinion, verified by Auckland Council, Nuraply 3PT and 3PTM will meet the following provisions of the NZBC:

Clause B2 Durability: Performance B2.3.1(a), not less than 50 years performance expectancy.
Clause E2 External Moisture: Performance E2.3.3, roofs and walls shall prevent the penetration of water.
Clause F2 Hazardous Building Materials: Performance F2.3.1. Does not pose a hazard to humans.

Nurajacks and Nurapads

Nuralite

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Nurajacks and Nurapads provide a solution to the requirement to 'float' a deck surface over a membrane deck.

For a high performance, fully warranted system, specify Nuraply 3PM waterproofing membranes with Nurajacks to support the tiles, pavers or decking
Ensure the system is braced against the surrounding cladding systems using Nuralite’s Tile Cladding Spacers

Building Code — meets Building Code requirements for floated decks over membranes
Council Standards — meets Council requirements for removable decking over membrane decks

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