Site Description

The home is a 1910, single story, 850sf wood frame structure over a bare earth crawl space. Roof ridge orientation is North South. Includes a detached 130sf finished workshop.

Upgrades include:
• New foundation, earthquake resistance foundation ties, continuous vapor barrier.
• Spray open cell foam insulation between floor joists (R28).
• Install continuous plywood sub-floor under engineered bamboo flooring to block air infiltration.
• Install blown cellulose wall insulation (R20+).
• Install new doors, frames, and sills to stop air infiltration.
• Replace windows with new double pane, fiberglass, and sash windows in the original house style.
• Thermal scans to identify attic air leaks and installation of infiltration blocking material.
• Increase attic insulation to R50+.
• Install tubular sky lights in north facing kitchen
• Install tubular sky light and greenhouse window in bathroom to add natural lighting.
• Install on-demand gas hot water heater.
• Install evacuated tube solar hot water heater with 80 gal storage tank and proportional pump control.
• Install 98% efficient modulated gas furnace and increase insulation on supply ducts.
• Install standing seam metal roof in a light color to reduce attic heating in summer and improve rainwater quality for collection.
• Upgrade from 1,900 to 3,420 watt of PV panels with grid tie inverter.
• Replace all major kitchen appliances with ones Energy Star rated.
• Replace 98% of incandescent lighting with T8 fluorescent, CFL, and LED.
• Install a three tank, 2,300 gal rainwater collection system with filtered pressure water delivery.
• Install a dual flush, low water volume toilet.
• Install a front loading, water efficient washing machine.
• Install aerators on all faucets and low flow shower head.
• Pave driveway with pervious concrete using washed river stone.
• Create a low water use yard landscape with attention to appeal.

The workshop is a 130sf wood structure with cedar siding built on an existing concrete slab foundation from a previous garage. It is fully insulated (R19). A center section of clear roof panel and high side windows provide natural lighting with a double pane casement window for ventilation. It is fully wired with an 80 amp 240 volt electrical service.

The main structure air exchange is now 0.31 per hour as determined by blower door test. The blower door test was done as part of an energy audit after most upgrades to confirm status of the remodel and direct final projects (solar PV upgrade and floor insulation). Average daily water use is 20 gal per person, 25% of the last published Seattle per person residential average. Utilities use is tracked with a spreadsheet. Records going back ten years give direct visual reference to changes in utility consumption as projects are completed. A whole house monitoring system displays current and historical electrical, solar hot water system, and weather data.


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