One of the main features of the energy-efficient home is the PVC windows. Supplied by NK Windows, the award-winning windows help achieve a warmer, safer, quieter and greener home. The 5-chamber profile (with a material depth of 70 mm) outperforms any standard or thermally broken aluminium joinery on the market.
“I love the play of light and height in the home... although it doesn’t have a huge footprint, there is definitely a sense of volume.”
“Windows and doors generally account for one-third of the exterior wall area of your home,” says Martin Ball of NK Windows. “So you can significantly affect how much energy you retain, the levels of condensation, heating and cooling costs, and how comfortable your home is by the quality of windows you use.”
Johnny and Debs chose NK Windows’ standard offering, with uPVC frames and double-glazing including argon gas, Low-E coating and ThermixR spacer, with an R-rating of 0.9. This far exceeds New Zealand building code requirements and is a perfect solution for South Island conditions.
“We rarely need to put the heat pump on,” says Johnny. “The windows perform really well, and we’ve been delighted with the innovative European turn and tilt style of opening. It makes cleaning easy, and they really help to maintain a stable temperature throughout the home.”
Energy-efficient houses are only ‘passive’ in the sense that the building envelope does most of the work to maintain these comfortable temperatures, allowing for simpler, smaller mechanical systems. Aaron explains more, saying, “We’ve built this house with thicker timber frames than are required by the building code. We’ve installed an airtight layer to ensure the building is protected from external and internal moisture damage.”
A service cavity was built in so that cables and pipes for the home do not have to compromise the airtight layer. With extra insulation throughout the home, this combination of measures makes the home draught-free, long-lasting and low-allergen emitting.
Because the house is airtight, it requires balanced and controlled ventilation with high-quality heat exchange to provide fresh air at all times. Susanne recommended a ventilation system, which includes a unit in the wall of every room. These allow stale air to exit and fresh air to enter, without the need for ducting. “Fresh air can enter the home even though all the windows are shut,” says Susanne.
From the outside, the home looks like rectangular with two gabled ends. It’s a straightforward footprint, but the vertical corrugated iron cladding and the warm plywood exterior with the recessed windows have turned an angular home into a warm and inviting abode.
Inside, the home is designed in such a way as to be instantly homely. The living-dining space has a high ceiling and the plywood kitchen with concrete benchtop make the home warm, light and useful.
“I love the play of light and height in the home,” says Susanne. “Although the home doesn’t have a huge footprint, there is definitely a sense of volume.”
The timber plywood features separating the kitchen and the living space (and continuing along the wall of the staircase) tie it all together beautifully.
When the couple opened their home up to the public for the Superhome Movement show weekends last year, visitors commented on how they instantly felt at home in the space.
“It’s functional, and it gives back a bit of energy,” says Johnny. “We may be in the suburbs here, but we feel like we’re on holiday. We’ve even nicknamed the property ‘The Hoon Hay Chalet’.”
And others clearly recognise its significance. ADNZ (Architectural Designer New Zealand) awarded the home a commendation in the Residential Interiors Architectural Design category in 2020. Its Homestar 7 rating means this home is recognised as being built at or above current standards set by the New Zealand building code.
INVOLVED IN THIS PROJECT
ARCHITECT
Architecta Ltd
021 263 4310
architecta.co.nz
BUILDER
Aaron Stewart Builders
027 720 9046
aaronstewartbuilders.co.nz
WINDOWS
NK Windows
03 344 3126
nkwindows.co.nz