Building Science

Vapor Profiles Help Predict Whether a Wall Can Dry

Posted on August 5, 2010 by Peter Yost

Today’s walls, roofs, and floors are better insulated, tighter, and made with a much greater variety of components than they used to be, making them a lot more susceptible to moisture problems when they get wet. Compared to the old days, today's walls and ceilings are more complicated and can be very slow to dry.

Whether Wood Weathers

Posted on June 28, 2010 by Peter Yost

The weathering of wood is very different from decay; weathering is breakdown at the surface only. While there are a number of forces that contribute to weathering of wood—moisture, temperature, abrasion by wind-borne particles, air pollution—it’s the narrow band of high-energy ultraviolet light in sunlight that is the dominant force (see Image #1).

What bare wood looks like when cut or milled

How Heat Moves Through Homes — Building Science Podcast

Posted on April 12, 2010 by John Straube

In our last episode, Dr. Joe Lstiburek talked about efflorescence and the serious damage that water and salt can do to masonry. This week, Dr. John Straube explains how the three forms of heat flow work, and debunks the claims of a few common insulating materials.

Comfort is the Primary Purpose of Buildings

Efflorescence = Water Damage — Building Science Podcast

Posted on March 29, 2010 by Joe Lstiburek

This podcast series is excerpted from a two-day class called "Building Science Fundamentals" taught by Dr. Joe Lstiburek and Dr. John Straube of Building Science Corporation.

Air Barrier or Vapor Barrier? - Building Science Podcast

Posted on March 10, 2010 by Joe Lstiburek

This podcast series is excerpted from a two-day class called "Building Science Fundamentals" taught by Dr. Joe Lstiburek and Dr. John Straube, of Building Science Corporation.

Become a Master Certified Green Professional

Posted on February 4, 2010 by Peter Yost

As part of a new Master Certified Green Professional designation, NAHB worked with GreenBuildingAdvisor to develop a rigorous training course covering green home building, full of building science and quality construction details. This course premiered at the International Builders Show in Las Vegas just last week.

Steve’s Garage

Posted on January 17, 2010 by Michael Maines

Once a month in Portland, Maine, a group of builders, carpenters, architects, engineers, energy auditors, insulation contractors, and other fans of building science get together for, to quote the invitation, “an informal discussion for building professionals to ask, learn, debate, knock around, support, agonize over, ridicule, flog and answer the challenges and concepts of the best building practices.”

Why Does Green Building Matter? (Part 2) - Building Science Podcast

Posted on October 30, 2009 by John Straube

This podcast series is excerpted from a two-day class called "Building Science Fundamentals" taught by Dr. Joe Lstiburek and Dr. John Straube, of Building Science Corporation.

Why Does Green Building Matter? - Building Science Podcast

Posted on October 5, 2009 by John Straube

This podcast series is excerpted from a two-day class called "Building Science Fundamentals" taught by Dr. Joe Lstiburek and Dr. John Straube, of Building Science Corporation.

Understanding Indoor Air Quality (2) — Building Science Podcast

Posted on August 11, 2009 by Joe Lstiburek

This podcast series is excerpted from a two-day class called "Building Science Fundamentals" taught by Dr. Joe Lstiburek and Dr. John Straube, of Building Science Corporation.

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