With 2018 coming to a close, we reviewed the most read blog posts of the year. Air sealing was our most popular topic. With more states adopting stronger energy codes, readers were very interested in how to use high-performance building practices and proper air sealing to achieve new air tightness targets.
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Many builders challenged with meeting new, more stringent residential building energy code requirements like the 2012 or 2015 IECC have been having a tough go of it. One HERS rater reported earlier this year that roughly 50 percent of builders in his region of Texas would fail an initial blower door test under the 2012 IECC, which requires a 3ACH50 air change rate.
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If technology is a bullet train, home building is a bicycle. Technological changes occur at a dizzying pace, but the main design of the bicycle – like that of a home, has changed very little in centuries. However, while home design principles haven’t changed much, architects and builders have more knowledge than ever before of building science and how it can improve building durability and performance.
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Deadlines, details, and demands are part and parcel of any construction project, whether residential or commercial. Project managers are largely responsible for overseeing all the aspects of a construction job and a well-trained, experienced, and attentive superintendent or project manager can be the difference between having a flawlessly executed build or major, expensive headaches during construction. Identifying the traits that make for a great project manager is a must for builders that want to maximize productivity and keep costs in line.
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No, we’re not talking about a collective Weight Watchers group-loss goal or the number of plastic straws no longer used by quick serve restaurants, but insulation. According to the results of a new survey released by NAIMA, its member companies in the U.S. and Canada used 3.2 billion pounds of recycled materials in the production of residential, commercial, thermal, and acoustical insulation products in 2017. This achievement is an extension of the industry’s longstanding commitment to substantial use of recycled content in the production of fiberglass and mineral wool insulation products.
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While only two U.S. states currently have a mandated goal of zero net energy (ZNE) home construction after 2020, Oregon and California, it’s becoming increasingly clear that ZNE homes will be much more prevalent in the not-too-distant future as states and municipalities look for ways to reduce carbon emissions and ultimately mitigate the impact of climate change. In fact, 280 U.S. cities and counties, 10 states and 2,717 signatories have committed to support climate action with the We are Still In agreement, which aims to reduce climate impact by among other things, lowering greenhouse gas emissions.
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As communities and municipalities look to adopt improved building energy codes to meet climate or resiliency goals, including additional requirements for solar PV energy production is a common discussion point.
There are often suggestions to allow for a larger PV system and forego other energy efficiency improvements that were included in the last few energy code updates. It’s argued that if a home has a solar PV system included, it is more cost-effective to expand that solar PV system than to make efficiency improvements such as improved windows, walls, or ceiling insulation. The question is, more cost effective for whom?
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Early this year, Insulation Institute set out to train as many contractors as possible how to achieve Grade I installation with fiberglass batt insulation. We selected three trainers to conduct half-day sessions in four states: North Carolina, South Carolina, Georgia, and Texas. Thirty-three sessions have been conducted or planned, and 700 participants will have completed the free training by the end of the year.
Insulation Institute spoke recently with each of the trainers to get their feedback on the program and any key takeaways they wanted to share.
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An average of 22 subcontractors are involved in the construction of a new home.[1] With dozens of people involved, there can be a lot of confusion about whose job air sealing is, particularly if details aren’t spelled out within the scope of work or aren’t communicated effectively.
Ensuring that new construction homes are properly air sealed often means communicating with all trades so that they understand their respective roles in achieving airtightness targets. How you communicate the requirements may differ, but there are some commonalities that top builders have when it comes to assuring air sealing success.
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Fiberglass insulations received a ringing endorsement in a recent report by Energy Efficiency for All (EEFA) that examines the health impacts of materials used in weatherization and energy efficiency upgrades for low-income multifamily housing stock.
The report reviews the materials used in these retrofits and ranks products – including various types of insulation – from least to most hazardous. According to the report, fiberglass insulations are among “the best insulation materials from a health perspective….and we recommend their use whenever possible.”
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