Holderness House
Architectural design and construction: Garland Mill Timberframes
Integrated systems design (envelope and energy systems) and energy modeling for a private residence in Holderness. This existing lakefront home is being renovated to become a zero annual net energy building; it should produce on site as much energy (electricity) as it uses in an average year. A 7 kW solar electric system will be grid-intertied, sending surplus energy to the grid on sunny days, and retrieving energy as needed at night and during cloudy periods. A ground source heat pump connected to closed loop vertical loop piping will supply heat. Solar hot water system will provide the bulk of the domestic hot water.
This project takes up the challenge of retrofitting a conventional 70s ranch to become a highly superinsulated home. Stress skin foam panels are applied to the existing walls and roof. Wall and roof framing cavities will be filled with closed cell spray polyurethane foam. Foam was added over the existing basement slab and a new floor was installed over the insulation. The basement was studded up on the interior (studs spaced off the concrete walls) and this is also filled with spray foam. As with all of our projects, the house will undergo blower door testing to verify air tightness performance. In the photo above, a new fiberglass frame, triple glazed window is being installed into the stress skin panel with a pan flashing at the sill. It was cold that day!
