Launch Slideshow

Kumuhau Subdivision

Kumuhau Subdivision

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    David Franzen

    The architecture takes cues from mainland plantation-style homes of the 1920s and '30s, which were often retrofitted with awnings and carports. Rebar-reinforced driveways hold up to heavy trucks and boats.

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    David Franzen

    Deep overhangs and prefinished aluminum awnings shade interiors from Hawaii’s hot summer sun.

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    David Franzen

    The 45 fiber-cement-clad homes are oriented for solar exposure and staggered to capture trade winds. A slab-on-grade monolithic pour (carport to house) and Hi-Bor treated building pad keep termites at bay.

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    David Franzen

    Solar panels clip easily onto the reflective standing-seam metal roof.

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    David Franzen

    Natural ventilation was a cost-saving strategy. An open plan optimizes the whole-house fan. Living room and bedrooms have at least two walls with windows at body height, and an 8-foot sliding-glass door makes carport dining a breeze.

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With their metal roofs, awnings, carports, and vertical siding, the 45 subsidized homes in this rural community bring to mind Hawaii’s old plantation-style dwellings. Some of those traditional elements even helped the project earn LEED-Gold status, and targeting LEED gave Armstrong Development the edge in a competition sponsored by the Department of Hawaiian Home Lands, the state’s largest residential developer. “Everyone else was close on price and qualifications, but we were the only competitor committed to certifying each model under LEED,” says architect Daniel Sandomire.

The company took a risk, which caught the attention of our own judges. In a climate with summertime humidity topping 80%, these homes have no air conditioning; instead, a whole-house fan exhausts hot air into the vented attic. Installed and operated at a fraction of air conditioning’s cost, it became one of the homes’ most popular features, along with a carport that doubles as a dining lanai. “For a target clientele that likes to live outdoors, the carports make the houses more livable, and you can’t be running the air conditioning when you’re moving between indoors and out,” Sandomire says.

Panelized metal wall framing went up in one day, adding cost efficiencies, and the metal roof surface is ideal for solar panels, which clip onto standing seams without penetrating the skin. Rainwater collects in 51-gallon storage containers, where it’s tapped for drip irrigation.

The 2.5-kW PV array is slated to supply about two-thirds of each home’s electricity needs. And by including wiring for additional solar panels, a future electric car, and square-footage expansion, Armstrong’s designs allow buyers to stay put even if their circumstances change. “Many people were buying the home they could afford, not the one they needed,” Sandomire noted of the five models, priced from $225,000 to $325,000.

 

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