By Thomas Peterson, Institute for Super Energy Efficient Building, Founder and President
The Institute for Super Energy Efficient Building
When I first became involved with energy efficient housing back in the 1970s I figured that such housing would quickly take off. It didn’t. I was determined to find out why.
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The popularity of HERS-rated homes is clear, with 38 percent of all new homes getting HERS rated in 2015[1]. This figure is indicative of the importance of this energy performance marker to both builders and homebuyers and the growth trend is likely to continue. As builder adoption of the HERS score expands, how can HERS raters help builders make the transition from standard code-built homes to HERS-rated homes more efficiently?
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Addison Homes, a green builder in Greenville, South Carolina, certainly didn’t set out to cause trade partners to grumble, murmur or gripe. They set out to build DOE certified Zero Energy Ready Homes (ZERH) to provide their customers with the energy savings, comfort and indoor air quality such homes deliver. To do that, Addison Homes had to get local trades on board by doing things a bit differently. In doing so, they provided award-winning homes that customers rave about. They even show off the energy-efficient features included in the home (the homeowners in their winning Cobbler Lane project show their guests the pristine conditioned crawlspace…seriously).
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In the 1963 film “The Great Escape”, we were rooting for McQueen, Bronson, Attenborough and crew to safely escape the Nazi prison camp. When it comes to air fleeing our homes, our hope is exactly the opposite. Codes and customers are pushing for more energy efficient homes, and that means tighter envelopes. Tighter homes have significant impacts on both moisture management and air quality, but at a more basic level, they are just plain hard to build. A tight home is a result of successfully combining People, Practices and Products (our 3 Ps of air sealing) to deliver the desired result. Executing requires diligence from multiple subs, at many stages of a build, typically employing multiple products, both air barrier materials and sealing accessories. This complexity begs the question: how do I prioritize my focus (and my money) to attack the biggest problems first?
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Over the first half of 2016, The Insulation Institute conducted qualitative research[1] with builders exploring a few areas, including the changing dynamic between home builders and home buyers. The “Google Era” has changed the way homebuyers enter into the buying process and is reshaping their interactions with builders. They are researching more; more about homes, more about building products, just more in general. This leads to new opinions and new questions for builders, including about energy efficient homes. These opinions and questions can be a problem, if not responded to effectively. Our research found that builders can employ three effective techniques when faced with a buyer (or prospective buyer) who has ideas about energy efficient homes that may be a challenge if not properly addressed.
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For an insulation inspection during a building inspection, our handy guide – “25 Checkpoints for Inspecting Insulation Jobs” – covers all the bases, and then some. Intended to provide useful guidance on how to improve the quality of the installation of insulation products, the List has been created by our experts here at the Insulation Institute. It tells you what to look for when inspecting insulation in wall areas, as well as ceilings, floors and other areas.
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Yes. The answer is simple, so this could be the shortest blog ever. However, given the misinformation that is out there it is worth explaining why R-value is in fact a good measure of thermal performance and dispelling some common misconceptions about it.
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When it comes to energy costs, we all know the big numbers lie in heating and cooling the house. A large portion of this excessive energy use is due to air leakage as well as too little – or improperly installed – insulation. A good thermal boundary, which includes insulation, windows and doors, not only reduces energy waste, but also greatly increases an occupant’s comfort. Which brings us to heat flow. How heat flows, where it goes and how to control it is key to a whole-house systems approach that can create better homes for today’s homeowners.
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Whether you’re building new construction or working on a renovation, you’ve got to think about preparing for and preventing the impact of water on the structure of the home. Because without your expertise, homes can easily have a drinking problem — and the water they absorb can be downright destructive.
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KB Homes, a top 10 builder nationally, has firmly established itself as a leader in energy efficient building. In April of this year, it won its sixth consecutive Energy Star Partner of the Year Award. Additionally, in 2013, 2014 and 2015 it received Department of Energy Housing Innovation Awards for its Zero Energy Ready Home (ZERH) construction. With this level of success it begs the question “what are they doing?” DOE’s “Tour of Zero” website has detailed case studies on a number of homes (which we have written about before), including those from KB, but we will look specifically at the approach they took to insulation and air sealing in these homes, as well as the resulting ACH levels and HERS scores.
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