Two levels: Main level and walk-out basement. There is no upstairs, the
dormers are false. The attic is flat with R-50 cellulose for insulation.
The basement consists of 8 inch ICF walls, the main level is a 6 inch ICF
wall. A vibrator was used during the pour of both levels to improve
consolidation of the concrete.
The windows are Anderson Low e argon filled units.
The doors are fiberglass Therma-true brand units, except for the 6 foot
hinged Andersen patio door at the rear of the house.
The attached garage is 2 x 6 stick build design.
|Energy saving construction methods
The attic is insulated with cellulose, not fiberglass. Cellulose does not lose its effectiveness
with exposure to low temperatures, like some insulation does. Fill depth is 15 inches, equal to
about R-50. A flat attic is used, which is much simpler to effectively insulate than an angled
roof that is encountered with 1 1/2 story homes.
Insulation rated can lights are used, and covered with 8-10 inches of cellulose above the top
of the can. Fluorescent 65 watt equivalent, 15 watt actual, bulbs are used to minimize heat
build up in the can and reduce energy usage. These Thomas lights are rated at 150 watts
without insulation, or 75 watts under insulation, but will kick off with 60 watt standard bulbs
due to the effectiveness of the cellulose insulation.
There is no access door to the attic from within the house. It is accessed through the garage
attic, then going through the end truss.
Soffit guards made from 2' x 8' strips of insulation board with notches cut out to fit the ceiling
joists are used to keep the cellulose out of the vented soffits, and allows full insulation over to
and actually on top of the top plate. All gaps in the top plate were filled with expanding foam.
All doors and windows were sealed with low expanding foam to seal around them.
A GFX grey water heat recovery unit is used in the main stack to recover heat energy from
the main level drain discharge.
A Bosch tankless hot water heater is centrally located in the basement for quick access to hot
An Aprilaire energy recovery ventilator is used to exhaust the 3 bathrooms and provide fresh
air to the house, while recovering energy from the conditioned air.
The basement floor has a small amount of insulation under it to provide a modest thermal
barrier between it and the ground.
|GFX Gray Water Heat exchanger in main stack
|Aprilaire ERV is used as the exhaust fan for the
three bathrooms. A simple 4 way switch circuit is
applied, allowing the fan to be operated from any
one of the 3 baths. Conditioned air is not
wasted, and fresh air can be brought in at any
time needed. Typical bath use is usually enough
to keep the air inside fresh.