How long should we wait to get an idea of our energy usage after adding spray foam insulation over the entire house?
-LeeAnn in Iowa
Nov. 16, 2016
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Iowa Energy Center
Staff

It is suggested that you wait 12 months after you’ve added spray foam insulation and [...]

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How do I determine the size of the overhang on a shallow deck on my home so that it allows in winter sun but blocks direct summer sun?
-Mark in Iowa
Feb. 5, 2016
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Sunlight shining on window surface is a function of latitude, cardinal direction, dimensions of the [...]

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What should the humidity level in my home be during summer months in Iowa?
-Jaime in Iowa
Aug. 25, 2015
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Iowa Energy Center
Staff

Most people are comfortable with relative humidity percentages between 30% and 50%. Humidity above 65% [...]

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I have problems with mold and mildew, and have been told a vapor barrier would help. Do I ventilate or encapsulate?
-Wendy in non-resident
Jun. 19, 2015
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Bill McAnally
Independent Consultant

Simple ventilation alone exchanges air from inside the home with air from the outside. This [...]

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In an historical building, is it better to insulate the roof deck when reroofing or insulate the attic space?
-Margaret in Iowa
Jun. 10, 2015
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Bill McAnally
Independent Consultant

This is a common question when working with historical buildings in Iowa. The biggest issue [...]

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What energy standards/quality should we look for when buying replacement windows?
-Jeff in Iowa
Mar. 6, 2015
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Replacing old windows with energy efficient windows will make an impact on both your utility [...]

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