'Special Spaces' - New England Home

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It’s Only Natural

In Harwich Port, a couple goes the extra mile (and then some) to build a home that’s healthy for their children—and the planet.

Sliding wood doors from Duratherm offer easy indoor-outdoor flow between the deck and the living room of this Harwich Port home, which Martha’s Vineyard Interior Design furnished with curvaceous, cushiony pieces covered in eco-friendly linens and linen blends.
Photography by MICHAEL J. LEE

People usually build a vacation home to escape from it all. But Michael and Jennifer Monteiro didn’t believe that meant escaping their obligations to the planet.

In designing their beach house in Harwich Port, the couple considered not just the energy needed to power it, but the sustainability of the materials used to construct it. “One of the goals was to try to source building materials that are bio-based, and to stay away from materials that we know are hazardous to the environment and to human health,” says Michael, the founder of

ABOVE: The entry hall is sandwiched between the home’s two gabled masses, offering street access at one end and beach access at the other. BELOW: Architect Adam Titrington left the ceiling structure exposed to gain height on the open main floor, which had to be compressed due to height limitations imposed by the thick hemplime roof insulation.

ABOVE: To reduce the scale of the house, Titrington divided it into two offset gabled boxes, which he shingled to blend with the surrounding homes. LEFT: The staircase is supported by steel stringers that rest on an I beam holding up the second floor. A skylight at rear illuminates a mural of sand drifts that Anthony Néron sculpted into the entry hall’s lime plaster wall.

“THERE’S A LOT OF TALK NOW ABOUT PLANT-BASED EATING, BUT THIS WAS PLANT-BASED BUILDING.”
—Architect Adam Titrington

a firm that invests in companies promoting climate solutions.

He found a kindred spirit in Adam Titrington of Estes Twombly + Titrington Architects in Newport, Rhode Island. “There’s a lot of talk now about plantbased eating,” Titrington muses, “but this was plant-based building.”

The 5,400-square-foot home, built by C.H. Newton Builders, was divided into two shingled boxes to help reduce its mass and provide a pair of south-facing roofs for the solar panels that power it.

Those roofs were covered in recyclable zinc, the concrete foundation incorporates fly ash in place of CO2-producing Portland cement, and PVC pipes were banished in favor of cast iron. The house was built atop piers, with basement walls that could be removed to allow waves to wash underneath, should climate change demand it.

At Michael’s suggestion, the house was insulated with hemplime, a mix of hemp fibers, lime, sand, and water that (unlike toxic petroleum-based spray foam insulation) is fire resistant, renewable, doesn’t emit harmful gases, and

CLOCKWISE FROM BELOW: In the basement, customized game tables from Sean Woolsey Studio and Blatt Billiards reflect the home’s sophisticated design, while hemplime insulation was left exposed on the back wall to engage visitors. Gamers can take advantage of a neighboring wet bar with refrigerated drawers. The kitchen features Cambria countertops and white-oak cabinets that match the engineered-wood floors.

has thermal mass—meaning it can absorb heat and disperse it once the sun goes down. Common in other countries, it was untested in the U.S., where hemp was considered a controlled substance until 2018. (Michael became such a fan, he dedicated a website to it: capecodhemphouse.com.)

In place of synthetic house wrap, Titrington treated the exterior to a weather barrier made from lime render, a breathable mix of lime, sand, and

water. The hemplime’s rough interior walls were covered in lime plaster, whose handwrought texture lends a soulfulness that drywall can’t duplicate. The lime plaster absorbs moisture from the air,

lessening the need for air conditioning, handled here by an air-source heat pump abetted by triple-pane windows and doors (from Duratherm Window Company in Maine) that overlook decks covered in

The rear deck includes a plunge pool framed by reclaimed granite; the doors and windows have no exterior cladding to reduce the use of aluminum and vinyl.

black locust, an invasive, locally sourced alternative to tropical hardwoods.

The sleek, sunny interior betrays little trace of the science behind the home, thanks to Liz Stiving-Nichols and Katie O’Neill of Martha’s Vineyard Interior Design, who delivered a calming coastal palette fashioned from natural, renewable fibers. “Part of the challenge was finding something that we felt could withstand life on the water,” says StivingNichols, who employed lots of cotton and linen upholstery and wool rugs in

CLOCKWISE FROM ABOVE: In the primary bedroom, a bed by Community Manufacturing backs up to a machine-routed wood wall that helps break up the expanse of white. A skylight illuminates the vanity in the primary bathroom. The Monteiros’ children, Jack, thirteen, and Maddy, fifteen, enjoy bedrooms overlooking the water and dunes.

H& T SPECIAL SPACES

A firepit surrounded by reclaimed granite dominates one side of the southfacing deck. An arbor shades the home’s interior in summer (abetted by fabric panels) but permits passive solar gain in winter.

lieu of petroleum-based synthetics. Furniture was either made domestically or crafted by regional artisans to reduce carbon expended in shipping.

Titrington estimates that the sustainability measures added about 30 percent

to the cost of the house. While that’s a sizeable upcharge, he notes that “the costs on a lot of these approaches are coming down.” That’s good news for homeowners and Mother Earth.

EDITOR’S NOTE: For details, see Resources.

ARCHITECTURE: Estes Twombly + Titrington Architects

INTERIOR DESIGN: Martha’s Vineyard Interior Design

BUILDER: C.H. Newton Builders

LANDSCAPE DESIGN: Kimberly Mercurio Landscape Architecture

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