Completion

Completion date
11/01/2014

Occupancy

Owner occupied; 2 occupants full time. Occasional house guests: 4 for 2-3 weeks per year

Days per year Building is fully occupied:
365

Scope

Original 1970's single story ranch (with full cellar) with 1990's one room addition with porch, on pilings. Ranch was demolished to first floor deck, cellar was preserved. One room addition was gutted to studs, floor and roof, and porch removed.

Type of Construction New, Retrofit
Number of buildings 1
Floor area of each building 3,100
Bedrooms 4
Bathrooms 3.5
Stories 2
Conditioned Building Volume 23,000 cu ft
Conditioned Floor Area 2,700 sq ft
Unconditioned Floor Area 1,000 sq ft

Location and Climate Details

Single family residence

Address
39 Sengekontacket Road
Edgartown, MA 02539
United States
Location Type Suburaban
Climate Region Zone 5
Köppen Climate Type Cfb
Lat. / Long. POINT (-70.5728337 41.4192946)
Elevation 12 ft
Solar Insolation 3.74 KWh/m2/day Annual Average
Annual CDD and Base Temp 41 Ave over las 5 years | 78 deg F
Annual HDD and Base Temp 5600 | 65 deg F

Site

Site conditions:
previously developed land, wetlands, lake/pond,, sensitive habitat, preexisting structure(s)
Site description:

The house is on a ~.85 acre lot on a peninsula including a tidal salt marsh and on the edge of a salt pond, totally within the coastal zone.

Materials and Design Strategy

Materials:

As it is in the coastal zone, no increase in footprint was allowed; a variance was obtained for a slight increase in height, to allow a second floor. Local regulations limit the amount of fertilizer which can be applied per year; we actually apply none, using native plants. The existing cellar and pilings were preserved and minimal excavation was done to install a nitrogen reduction septic system.

Special architectural measures:

South facing window area, along long axis of house, was maximized; other exposures were minimized. All windows have overhangs which minimize heat gain in summer but allow maximum heat gain in winter. Window SHGC is 0.440, U factor is 0.150. Windows were installed with foam and taped around the edges. Windows are hurricane glassed. House walls are about R-45, roof is R-65. The ranch is build with SIPs and the (gutted) addition is sheathed with nail-base SIPs. Cellar was foam paneled and the rim joists were spray foamed. Blower door testing revealed it met the Passiv Haus standard for air infiltration.

LCA Description:

No

Indoor Environment Description:
There is a Zender 550 ERV system set to 125 cfm for the house.