Three Tilting A-Frames Form a Net-Zero Mountain Retreat in Colorado

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Project Details:

Location: Boulder, Colorado

Architect: Renée del Gaudio Architecture / @reneedelgaudioarchitecture

Footprint: 3,670 square feet

Builder: Coburn Development

Photographer: David Lauer Photography / @davidlauerphoto

From the Architect: "Betasso Overlook challenges traditional alpine cabin norms, creating a new vernacular rooted in Rocky Mountain culture, climate, and landscape. The form shuts down winter winds with a solid and steep roof/wall and opens up to the morning sun with floor-to-ceiling glass. The form is broken down into three smaller volumes and clad entirely in dark metal so as not to upstage its stunning alpine setting.

"The three-cabin composition is in tune with the topography, with each cabin stepping down in elevation as one moves toward the view of Betasso Nature Preserve. The cabins are distinctly programmed for working, living, and sleeping. Glass halls connect each cabin, creating a sunny ‘space between.’

"Double fir rafters encase steel flitch plates, allowing for long spans of open space. Hemlock ceilings layer above, bringing warmth to the inside. Rafters align with the cabinetry below, creating a sense of rhythm and calm. Concrete floors ground the house to its rugged mountain site.

"The home is 100-percent gas-free, operating on geothermal energy and electric appliances. A ground source heat pump provides radiant floor heating. Floor-to-ceiling casement windows create an airy interior space with natural cross-ventilation. Continuous insulation around the exterior framed walls forms an airtight building envelope. The home operates net-zero with a 9kW photovoltaic array."