Insulation Institute Blog

Posts Categorized: Energy Efficiency

Air Sealing: Whose Job Is It Anyway?

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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Air Sealing: Whose Job Is It Anyway?

Fiberglass Among “Best Insulation Materials from a Health Perspective”

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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Fiberglass Among “Best Insulation Materials from a Health Perspective”

Lessons From Brad Pitt’s Effort to Make It Right

What was a lofty philanthropic effort by actor Brad Pitt has morphed into a disastrous example of how poor construction of affordable, energy-efficient housing can negatively impact homeowners and put the builder and building designer in a precarious position.

NOLA.COM reported this week that in 2007, two years after Hurricane Katrina, Make it Right Foundation, organized by Pitt, set a goal of constructing 150 energy efficient, sustainable and affordable homes for residents of Louisiana’s devastated Lower Ninth Ward. The foundation constructed 109 homes, but just 11 years after the start of construction, reports say that some homes have issues including rotting wood, mold growth, dangerous air quality, and rusty sockets. The majority of the homes are currently unoccupied and some have been demolished.

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Lessons From Brad Pitt’s Effort to Make It Right

Master the Training, Witness the Test

In the quest to meet new energy code requirements of the 2012/15 International Energy Conservation Code (IECC), some builders are finding that passing that all-important blower door test is their biggest challenge. As we’ve reported earlier this year, only 40 to 50 percent of new construction homes that must now meet the 3 ACH50 blower door target will pass the first test, but builders can increase the initial pass rate, according to Cosco Jones, owner of Jones Sustainable Solutions Group. Jones is a HERS rater who’s worked with more than a dozen builders to improve the energy performance of their new construction homes. He offered his advice to builders on how to not only increase the pass rate for blower door testing but also reduce their costs in the process.

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Master the Training, Witness the Test

3 Commonly Missed Air Leakage Pathways

In our effort to help builders and contractors reduce air leakage in new construction homes, much of the focus has been on the building envelope. However, there are other areas outside of the building envelope that can prove problematic for air leakage. Bob Nelson of Ener-G Home Performance Consultants shed some light on three commonly overlooked areas that can contribute considerably to air leakage and often, help contribute to the 50 percent initial failure rate on blower door testing of new homes.    

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3 Commonly Missed Air Leakage Pathways

Future-Proof Home Construction

In his more than 30 years as a residential building contractor, Jim Iredale focused much of his career on constructing code-built custom homes. That changed in 2012 when he had the opportunity to work on a very high-end project that was designed to meet passive haus (house) standards, and a devotee was born.

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Future-Proof Home Construction

Want More of a Good Thing? Switch Your Trusses

By: Matthew Brown, CGP, APA Engineered Wood Specialist

Insulation can increase a home’s energy efficiency, but only if it’s properly installed. Batt insulation installed as per manufacturer instructions should perform at its stated value, but R-value can decrease if it’s compressed in tight spaces.

In roofing assemblies, conventional trusses can restrict insulation space above the exterior wall top plate, resulting in compressed insulation. Raised-heel trusses can provide a significant boost to the insulating power of a home.

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Want More of a Good Thing? Switch Your Trusses

Right-Sizing AC in High-Performance Homes

Some people think that the idea of a high-performance building is a new concept, but it has been around for some time now. As defined in the Energy Policy Act 2005, a building that “integrates and optimizes all major high-performance building attributes, including energy efficiency, durability, life-cycle performance, and occupant productivity” is a high-performance one.

Today, many builders have already applied the principles of a high performance into their homes, and homeowners are now enjoying the benefits of living in a place that sets the bar much higher for energy efficiency, comfort, durability, indoor air quality, and the use of sustainable products.

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Right-Sizing AC in High-Performance Homes

Energy Data Gains Traction in Home Listings

What impact will energy data for 110 million homes have on the energy efficiency industry?

By: Ryan Meres, RESNET Programs Director

For more than a decade studies have consistently shown that home buyers want energy-efficient features, but few are aware of the impact those features have on energy cost. The average U.S. homeowner spends more on energy than property taxes and insurance, but energy is the only one of those three common expenses not considered in the mortgage process. The announcement and report released by the Rocky Mountain Institute (RMI) that real estate platforms have begun including energy information in their listings is a significant step toward reducing the barrier to the transparency of energy use in the home-buying process.

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Energy Data Gains Traction in Home Listings

2009 Called. It Wants Its Energy Code Back

As advocates for building energy efficiency, Insulation Institute and many other organizations support the development and adoption of model residential building energy codes like the 2015 International Energy Conservation Code (IECC). Unfortunately, code adoption is literally “all over the map,” in the United States. Twenty-two states have a version of the energy efficiency code that meets or exceeds the 2009 IECC. Ten states meet or exceed the 2015 code, and 12 states have no statewide code at all, according to the Building Code Assistance Project. For those who support energy code adoption, it can seem like an uphill battle to advocate for newer energy codes, particularly when there are lots of misconceptions about the purpose behind the codes.

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2009 Called. It Wants Its Energy Code Back