Category: Air Tightness

Common Problems that Reduce the Effectiveness of Your House Wrap

High-quality house wrap is most often made of spun, high-density polyethylene fibers. It is a vapor-permeable material designed to simultaneously block the passage of liquid. Properly installed, it’s a WRB with the ability to resist moisture while allowing humidity to escape from exterior wall cavities, which is of particular importance in humid climates. However, unforeseen […]

Building Envelope Code Changes and Builders

Because international building codes are regularly updated, it is always important to look at the recent changes to the International Residential Code and what it means to builders. Not surprisingly, the 2012 update of the International Residential Code (IRC) includes more demanding energy performance standards than the 2009 update. Also, it simply references many of […]

How Blower Door Testing Can Help Homebuilders

As more and more homeowners and homebuilders seek energy efficient structures, residential codes are responding. As we’ve seen from the standards set in the 2012 and 2015 versions of the International Energy Conservation Code, air tightness standards are significantly higher in order to address energy efficiency. Though currently only nine states have adopted the 2012 IECC and […]

Energy Efficiency in Modern Buildings

As modern building materials advance, energy efficiency is inescapable. Near-zero energy buildings are becoming increasingly popular in Europe. However, this will not have a great effect on energy consumption as a whole until energy efficient building materials and practices are widespread. Iowa State University Professor Yu Wang states that energy efficiency is relatively inexpensive when […]

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