What's Next: Refining the Design and Getting into the Details
Once adapted to your specific needs regarding location, site and topography, views as well as internal space planning and program we would refine the design, getting more specific about what makes this a net-zero capable home and site design. For starters in our mind those systems might include the following:
The building envelope considers fairly high performing insulation levels such as (R40) 12" double stud dense packed cellulose wall framing with 2" rigid out-sulation, (R60) 18" dense packed vented cathedral ceilings with TJI's, (R20) 4" min of underslab insulation and (R10) 2" foundation wall insulation.
Possibly a small size air source heat pumps for heating, Panasonic whisp to assist with air-sealing below on the wall and below the vented standing seam roofing.
Low-e clear triple insulated glazing and doors with appropriate solar window coverings to mitigate heat gain on the interior. There may be more specific tuning of the windows and doors depending on the face orientation of the home.
There would be an optional very small high efficiency wood or pellet stove, more for the "spiritual" fire with through wall venting to assist with fresh air intake. Or windows could be opened when the fire is lit for additional ventilation.
Simple durable interior finishes, hopefully locally sourced wood trim, low or now Volatile Organic Compound paint or stain finishes. Deciding on finishes appropriate for you lifestyle, lifestage, family usage are a longer conversation worth paying close attention to ease of long term care, warranties and eventual replacement and recycling or upcycling where possible.
All of the detailing would be designed and built to low-energy home performance levels helping to potentially achieve net zero-energy usage on a yearly basis. Another step would be running energy modeling, right-sizing the internal heating and ventilation system, optimizing the window sizes and glazing specifications.
Depending on the homeowner and family initiative and available time, an extensive vegetable garden nourished by composting might further enrich sustainable living. If gardening takes too much time, join a local Community Supported Agriculture farm to get your vegetables year round.
Third Party Green Building Programs: An Overview
Of course achieving those goals depends on the client, their budget and schedule, whether or not to purse local or national high performance building certification and at what level of performance. This might mean for example here in Vermont, enrolling in the Vermont Energy Star Home program or the High Performance Homes program run by Efficiency Vermont. Depending on where you're located in the U.S. you may want to consult the National Energy Star website to learn more.
Enrolling and completing such programs benefits the homeowner in a number of ways. Firstly during the construction phase and operation of the home, and then on the back end, providing green certification of the quality of the home for future reselling. This backend grows increasingly relevant as more and more State wide Multiple Listing Services add Green Building related components to available listing criteria for homebuyers. Called the Green MLS toolkit nationally this initiative has taken hold in Colorado, the Atlanta area, Chicago, Portland, Oregon and increasingly elsewhere.
Qualifying projects for Efficiency Vermont's Residential programs receive energy consultation and performance testing services helping ensure your high performing project complies with their program leading to receiving helpful financial incentives and certification of performance levels reached. Similarly NYSERDA in New York State, Mass Save in Massachusetts, NHSAVES in New Hampshire, EfficiencyMaine all provide Energy Star and in some cases High Performing home programs like Vermont.
Ask your architect and builder if they have experience with these programs or similar ones near you. If not, you may want to look elsewhere if you seek a energy efficient high performing home, whether new construction, renovation or an addition. Green building is mainstream now having matured over the last 20 years and in a sense is the new normal.
Other more stringent third party verification programs exist such as Passive House, Living Building Challenge, USGBC LEED for Homes to name a few. These involve adherence to even more stringent high performing efficiency and whole building and site design standards. They examine more closely sustainable siting, materials, low water and zero energy use, or even positive energy generation, holistic thinking, life cycle cost analysis and more.
We Welcome your Comments and Insight
In the meanwhile, we hope you've enjoyed this story about the design process. the overall design and some of the details of this Modern Farmhaus. Let us know if you have any questions and comments about the design. Happy to answer them.
If you enjoyed the links to green building programs, materials and other information and find them helpful do let us know below in the comments section. We are always looking for helpful information. Don't hesitate to share in the comment section below.
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