Tag Archives: R-value

Energy code math for commercial walls: How polyiso continuous insulation can help

April 10, 2018

When one comes across the R 13 + 7.5 ci wall insulation requirement in the International Energy Conservation Code (IECC) commercial provisions, it can be tempting to just add the two R-values and install R-20.5 rated insulation in the cavity with the assumption being that the same performance can be achieved with fewer steps.

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Rewriting the rules on cold-formed steel

March 21, 2018

The American Iron and Steel Institute (AISI) has released findings from research conducted to support the development of a calculation methodology for determining the U-factors and R-values for wall assemblies containing cold-formed steel.

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The rebirth of single-wythe masonry

January 12, 2018

Many conflate R-value with good thermal performance or insulating value. The belief is the higher the R-value, the better the thermal performance. However, as a blanket statement, this could not be any further from the truth.

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Specifying Flagpoles: Exploring standards and common errors

February 10, 2017

Flagpole specifications commonly found in institutional, commercial, and other requests for proposals (RFPs) have numerous errors, which, albeit not catastrophic, affect the aesthetic and functional life of the flagpole, as well as the project cost.

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Estimating R-values for enclosed reflective air spaces

January 5, 2017

Reflective insulation systems (RIS) consisting of a reflective insulation material and an adjacent enclosed reflective air space have been used as building thermal insulation in the United States for nearly a century.

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