Green building

Air Sealing Kneewalls

by Paul LaGrange

Any attic wall that adjoins an interior space should be insulated and air sealed! Where air barriers (See Info Sheet #1.3) are not installed on the unconditioned (attic) side of the walls, very hot or very cold air in the unconditioned space can easily flow through and around the wall insulation.   Figure 1 depicts cold […]

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Make sure to Seal All the Connections in your Flex Ductwork Some of the connections to pay attention to are:  the pressure box, registers, collars and boots. Connections at the junction box should be sealed with a heavy layer of mastic.  Mastic should be applied with a paintbrush around the entire perimeter of the collar […]

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Indoor Humidity Directly affects the Comfort Level of your Home Our bodies are comfortable with relative humidity levels between 30 to 60%.  In comparison, our houses need a much narrower margin – 35% – 40% in winter and 40% – 55% in summer – to operate properly. Even though our outdoor humidity levels remain fairly […]

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Flex Duct Sealing

by Paul LaGrange

Seal Ducts for Enhanced Energy Efficiency Depending upon the size of the leak, tremendous amounts of air can be lost from the duct work.  Repairing those leaks and making sure that they don’t return is relatively easy. Sealing the connections between flexible ducts, plenums, junction boxes and boots/registers keeps the HVAC system running clean and […]

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