Insulation Institute Blog

Posts Categorized: Building Science

Trading Off Thermal Resistance is a Very, Very Bad Idea

If you’ve been following our blog for some time now, you know that we write regularly about basic building science. In fact, we completed a primer, Building Science 101 with Building Scientist Allison Bailes a few years back. Dr. Bailes, a Georgia resident, recently wrote the state’s Department of Community Affairs to object to a proposal that would allow as little as R-20 spray polyurethane foam (SPF) insulation to be used on the underside of the roof deck in new homes built in the state when R-38 is required. You may ask why R-20 SPF at a blower door rating of 3ACH 50 was proffered as a substitute for R-38 and 5ACH 50. So did Bailes.

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Trading Off Thermal Resistance is a Very, Very Bad Idea

IAQ Drives Home Design Trends

A plethora of new reports indicate that coronavirus is shaping home design trends in the U.S. and globally. Among them, the American Institute of Architects Home Design Trends Survey shows that more outdoor features and flexible spaces are highly desirable. The survey also shows products that improve indoor air quality, thermal moisture control, and energy-efficient homes are growing in popularity.

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IAQ Drives Home Design Trends

Builder Spotlight: Insight’s Innovation Win

DOE’s Housing Innovation Awards recognize the best in home building innovation on the path toward Net Zero. Among this year’s winners in the production home category is Insight Homes, a Delaware builder and previous innovation award winner. Insight’s ability to evolve its construction practices to take advantage of the latest in building science developments and energy-efficient construction techniques are among the characteristics that set this exceptional builder apart from the competition.

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Builder Spotlight: Insight’s Innovation Win

Bentley’s 4 Rules for High-Performance Homes

Jeff Bentley is a fifth-generation home builder who’s built more than 4,000 houses and sold more than 2,000 homes in more than 45 years in residential construction. He’s also a HERS rater, LEED Green Builder and REALTOR® whose counsel on energy-efficient home building is highly sought after.  Insulation Institute reached out to Bentley to find out what practices can help builders meet more stringent energy efficiency code requirements and dramatically improve the way homes are built in America. Here are Bentley’s four rules for High-performance Homes.

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Bentley’s 4 Rules for High-Performance Homes

The Air Sealing Learning Curve

When newer editions of the International Energy Conservation Code (IECC) are introduced in states, often there’s a learning curve for home builders, especially when it comes to verification of a home’s air tightness with a blower door test. Some builders are having a tough go of meeting the new requirements.  Increasingly, they’re relying on energy efficiency professionals, like HERS raters to help them achieve the target. Insulation Institute spoke with Jonathan Lang, Manager of Training & Certifications for Knauf Insulation who is a BPI Certified Building Analyst, Building Performance Specialist, and ICC Residential Energy Inspector (whew!). We spoke about the challenges builders face in meeting air tightness requirements and why communication and education are so critical to meeting the targets.

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The Air Sealing Learning Curve

Matt Whitbeck’s Three Tips for Framers

Matt Whitbeck, Co-Owner and President of Whitbeck Construction, LLC specializes in custom framing, exterior sustainability, and residential remodeling. He’s serious about quality craftsmanship and energy efficiency. So much so that he is a popular speaker at building industry conferences on those topics. Whitbeck and Kevin Ireton spoke to a standing room only crowd in the High-Performance Building Zone at NAHB’ International Builders Show (IBS). Whitbeck also took time following IBS to speak with Insulation Institute on three tips for framing carpenters as they work to help builders achieve more energy-efficient homes.

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Matt Whitbeck’s Three Tips for Framers

Under Construction: A Resource for the Skilled Workforce

Building professionals across the country acknowledge one of the central challenges facing construction today is recruiting talented tradespeople. Ryan Miller, Founder and Executive Director of North Carolina Building Performance Association (NCBPA), a five-year-old not-for-profit association, is working on a solution: a toolkit of career resources for individuals interested in joining the high-performance building industry as a tradesperson. The resources will help guide students and others interested in the trades on the various career pathways in high-performance residential, commercial, and industrial buildings.

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Under Construction: A Resource for the Skilled Workforce

Technology is a Bullet Train, Home Building a Bicycle

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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Technology is a Bullet Train, Home Building a Bicycle

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