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How Heat Moves Through Homes — Building Science Podcast

Space-age radiant barriers work great in the vacuum of outer space, but here on Earth, heat moves by conduction, convection, and radiation, simultaneously, all the time.

Posted on Apr 12 2010 by John Straube

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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


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Understanding R-Value

R-value measures heat transfer by conduction, convection, and radiation

Posted on Mar 24 2009 by Martin Holladay

R-valueMeasure of resistance to heat flow; the higher the R-value, the lower the heat loss. The inverse of U-factor. measurements are subject to a fair amount of ridicule, especially by marketers of radiant barriers. As it turns out, however, the ridicule is mostly unwarranted.


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Image Credits:

  1. NETZSCH-Gerätebau GmbH

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