Super Energy-Efficient Home in Vermont

June 21, 2010 at 1:53 pm 3 comments


(from GreenBuildingAdvisor.com)

Waitsfield, VT

By Rob Wotzak

CS-Rossetto house exterior

The home was built into a hillside to provide easy access to both floors. Earth sheltering also tempers heat loss in the cold climate.

General Specs and Team

Location: Waitsfield, VT Bedrooms: 3 Bathrooms: 2 Living Space : 2000 sqf Cost (USD/sq. ft.): $90/sqf Builder: Al Rossetto, A. Rosetto Construction Architect/designer: Al Rossetto

Construction

Foundation: shallow frost-protected footing, gravel in perforated PVC forms/drains, 2 in. XPS (R-10) buried and extending horizontally distance of frost depth; 6-in. ICF walls (Amvic, R-22)
Walls: 6.5-in. SIPs (Insulspan, R-22)
Roof:12.25-in. SIPs (Insulspan, R-50)
Windows: triple-pane, low-e, argon-filled; SHGC, .24, U-factor, .2 (Kohltech, R-5)
Garage: none

Energy

Heating/cooling: radiant heating system fed by solar and gas hot-water heater, 4 flat-plate solar collectors with 120-gallon storage tank and solar heat exchanger
Water heating: shared with radiant heating system HERS score: 95.3 (old system)
Annual energy use: 51.4 MMBtu

Indoor Air Quality

  • Interior portion of Form-A-Drain footing system (under slab) is part of a natural-draft radon-venting system
  • ERV
  • Solid wood cabinets and flooring
  • Central vacuum system

Green Materials and Resource Efficiency

  • Fiber-cement siding
  • Trees cut down on site milled into stair parts and loft flooring
  • Almost all construction waste recycled

Certification

EnergyStar score: 5+ stars
Modest House Built to Scandinavian Green Standards
This modest home may not seem out of the ordinary, but energy efficiency specialist Efficiency Vermont calls it extraordinary — “Best of the Best” and “the most energy efficient home in the state,” to be specific. With a HERS score of 95.3 out of 100, and four years of energy bills to document its performance, the building deserves the accolades. Builder Al Rossetto leaves nothing to chance: he has used the same construction details to lock in five-star Energy Star ratings for every home he has built since.
Is Vermont the new Scandinavia?
The shallow, frost-protected footing is possibly this home’s most unusual detail. Northern Vermont’s deep frost line and rocky soil make building conventional foundations a challenge. A shallow bed of gravel surrounded by a horizontal apron of rigid foam insulation — a system used in Scandinavia for decades — worked well here. When paired with an insulated concrete form (ICF) foundation, this system ended up saving energy and materials. The walls and roof are all structural insulated panels (SIPs), which go up quickly and provide a tight shell. Energy efficient windows with triple glazing and multiple low-e layers (also standard equipment in Scandinavia) complete the package.
A healthy indoor space was the top priority Even though Al put a lot of effort into energy-efficient construction, his first priority was to build healthy home. He started by reviewing material-safety data sheets and scratching unhealthy products off of his list. The tile and solid wood used on the floors of the kitchen, bathrooms, and remainder of the house are easy to clean and don’t off-gas harmful chemicals. A heat recovery ventilator circulates fresh air from outside without letting precious heat escape. Flat-plate solar collectors provide 75 percent of the domestic hot water and boost the radiant heat system by preheating a 16-in. bed of sand under the ground floor. Mounting the solar panels on the ground instead of on the roof allowed Al to locate the house for accessibility and beautiful views rather than solar orientation. Only three trees had to be cut down to accommodate construction, and most of the wood was used as finished railings, flooring, and stairs. In the end, only six yards of construction waste was hauled away. Everything else was recycled. It was four years before another home grabbed the title of most energy efficient home in Vermont. Al has no hard feelings. “I’d like to shake their hand” he says about anyone who works as hard as he does to build better, more-efficient homes.

Lessons Learned

Don’t let all the fancy acronyms scare you. Green building isn’t only about using exotic materials and high-tech HVAC components. Building an energy efficient home is often just a matter of doing a good job. The SIPs came with an installation manual. “We read it, followed the directions and were conscientious during our work,” Al explained. Paying attention to details by filling voids and cracks with spray foam and caulk isn’t hard work, but it can make all the difference when it’s time to turn on the heat.

Rob Wotzak is assistant editor at GreenBuildingAdvisor.com


Image Credits:
  1. Chris Green/Fine Homebuilding 161
  2. Rob Wotzak
About these ads

Entry filed under: Build a green home in NH, Builders, Building Green, Clark Hill Woods, EnergyStar, Estate Lots, New Boston NH, Sustainable Design, Tax Credits. Tags: , , , , , .

Serious Materials Windows Hopper Design, LLC

3 Comments Add your own

  • 1. define cesspool  |  June 10, 2014 at 5:33 am

    Thank you for the good writeup. It in fact was a amusement account it.

    Look advanced to far added agreeable from you!
    By the way, how can we communicate?

    Reply
  • 2. Pole Barn Kits  |  March 2, 2014 at 1:18 am

    Flat based vents can be field installed or modified to fit snugly against steel buildings jordan the roof pitch.
    5 Earthquakes – The reinforced frame of a steel or metal building.

    Also, it is wise to invest in steel buildings. Know the steel buildings jordan outcome before going in!
    When you are creating these rooms you should be sure that you
    also look at the different types can be assembled like a big erector set.
    Steel is actually termite and insect resistant.

    Reply
  • 3. steel buildings nc  |  February 27, 2014 at 3:46 am

    Which isn’t a steel buildings nashville lot, using steel.

    We have several amazing offers and building
    types for you which you can buy at prices that are steel buildings
    nashville simply not potential with brick. Usually a third party
    for getting the specs of your building. Are you on a look out
    for a building that is environmentally friendly.
    For electrical, permits will be needed for running wires, breaker
    boxes, etc.

    Reply

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s

Trackback this post  |  Subscribe to the comments via RSS Feed


What do you think of our website? Are you interested in buying/building in New England? Do you want to have a highly energy-efficient home that costs much less to heat and cool? More…

Enter your email address to subscribe to this blog and receive notifications of new posts by email.

Join 5 other followers

More Blog Posts

Copyright Information

Website ©Ruth Trussell 2009-2010. Copyrights for some posts, illustrations, photos, etc., are held by their respective owners.

Blog Stats

  • 8,844 hits

Follow

Get every new post delivered to your Inbox.