Energy Star Homes, Whole House Deep Green Retrofit Renovations

Cottage Expansion & Update

This was a tiny, 1940’s cape-style house that was stripped down to the framing and completely re-built with an addition to one side.  At 1,800sf, the now three-bedroom house has been transformed into a comfortable and completely updated new home for the empty-nest homeowners.

Special Features

  • Open-plan layout
  • Master suite with cathedral ceiling
  • Raised deck off of master suite
  • Gas fireplace in Great Room
  • Custom kitchen cabinetry

Green Building Approaches

  • Existing exterior walls were framed with 2×4’s at 16” spacing. These were cross-strapped with 2×3’s at 24” spacing to eliminate thermal bridging, then insulated with 4.5” of 2lb SPF (R-30).
  • New exterior walls were framed with 2×6’s at 24” spacing, then cross-strapped with 2×3’s at 24” spacing to eliminate thermal bridging, and then insulated with 7” of 0.8lb SPF (R-31).
  • Existing 2×6 roof rafters were insulated with 6” of 0.8lb SPF. Then ventilated roof panels with 4” of polyiso foam board were laid over the existing roof sheathing (Assembly: R-51).
  • New roof areas were framed with 2×12’s at 16” spacing and then cross-strapped with 2×3’s at 24” spacing and insulated with 13” of 0.8lb SPF (R-58)
  • Garage ceiling was framed with 12” I-joists at 16” spacing and insulated with 12” of 0.8lb SPF (R-53)
  • Double-glazed Energy Star windows with u-values of 0.30
  • Fiber cement clapboard siding installed over ¾” drainage plane
  • Propane-fired, condensing furnace used for space heating
  • Condensing, propane, tankless water heater
  • Energy recovery ventilation

Certifications
  • Energy Star Certified
Awards
Project Year
2009
HERS Score
44
Type of Home
Cottage
City
Ridgefield
State
Connecticut
County
Fairfield
Project Size
1,800sf