by Michael Brokordt on November 14, 2016

Do air-sealing and insulation in your house yourself!

air-leakage

Do air-sealing and insulation in your house yourself! The following you can do only if found to be cost effective as determined by sequential blower-door-guided air sealing. • Cracks in exterior window and door frames should be sealed. If the crack is deeper than 5/16-inch, it must be backed with a material such as flexible polyurethane, neoprene butyl rod, fiberglass,…

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by Michael Brokordt on September 20, 2016

House Airtightness Testing And When Not To Air Seal

House Airtightness Testing And When Not To Air Seal House airtightness testing was made possible by the development of the blower door. The blower door measures a home’s leakage rate at the standard pressure of 50 pascals. This leakage measurement is used to compare homes with one another and set air-leakage standards. The blower door also allows the technician to test…

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by Michael Brokordt on August 25, 2016

What Is Blower Door Testing?

What Is Blower Door Testing? The blower door measures air-flow at 50 pascals house pressure (CFM50), producing a number that is used to compare the leakiness of homes. The blower door also creates pressure differences between rooms in the house and intermediate zones like attics and crawl spaces that can give clues about the location and size home’s air leaks.…

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