A Roadmap for Getting to Net-Zero – GWC Mag

When I designed and built my net-zero home in 2020, my goal was to keep it small, simple, and economical. I was willing to spend more upfront on quality materials and extra insulation if it saved on future maintenance, replacement, and utility bills.

I knew that a two-story square-shaped house would be more resource-efficient, but I had my heart set on a stretched-out ranch. So, from the beginning I was punching up on the material and operational costs. How could I rein in my remaining options and build a comfortable home within my budget?

My home is in Southern Wisconsin, a heating-dominated, cool-humid climate (zone 5A) with occasional need for summertime air conditioning. Here I will share what worked for me to reach my objectives, key among them net-zero energy use. Maybe the steps I followed can serve as something of a roadmap to net zero.

7 steps for reaching net-zero energy

1. Think in 3-D

The most valuable tool you have is a tape measure. Become curious about the space around you and the shape of the objects that furnish your life. With enough practice (and multiple iterations), you can draft a workable floor plan and basic section showing the components of the structure, including ceiling heights, stairs, and roof slope. To reduce material waste, stick to 2-ft. increments. Don’t forget to include wall thicknesses, and don’t get hung up on learning a drawing program; graph paper is fine.

The International Residential Code is a daunting document for the uninitiated, but there are just a few sections you need to read and understand to prepare a decent working draft. They pertain to exits, stairways, daylighting, and prescriptive R-values.

If you want to level up, I recommend the online 3D-modeling tool SketchUp Free to create your home’s basic shape and features,…