Air Sealing

The following chart shows where your home leaks the majority of heated and cooled air and the areas of focus for our Certified Green Technicians to air seal:

Air leakage throughout your home not only causes unwanted drafts, moisture migration, and lower indoor air quality, but it's also the #1 cause for energy waste and high energy bills for homes throughout the U.S. Air leakage occurs when the indoor air exits uncontrollably through cracks, holes and openings. It's these cracks, openings and crevices that are the leading cause of energy waste in homes across the United States.

To put this into perspective, it's reported by the EPA that if you add up all the holes, cracks and crevices in a typical single family home it's equivalent to having a standard size window open all year long .

For this reason, the single most cost effective solution every homeowner can implement is air sealing. All the air leaks around the windows, doors, through the recessed lights, attic accesses, and in the attic where electricians, plumbers and HVAC contractors made holes are the major cause for high energy bills in the U.S. This is also the reason why over two-thirds of the air you pay to heat your home goes towards heating your backyard!

It's also important to note, up to 30% of the air in your home comes from your crawl space or basement. Sealing all the excessive air leaks improves the indoor air quality of your home and reduces the levels of allergens and airborne pollutants entering your living space.

During your home energy audit, your National Energy auditor determines the locations of all the cracks, crevices, and holes throughout the home. The auditor takes very specific notes and works closely with the solutions teams to identify which leaks need to be sealed and where they are located.

Leaky ducts are another major cause of energy loss in homes across the U.S. The average duct system loses up to 55% of the air running through it because of all the leaky joints and elbows. During your National Energy audit, the auditor uses thermal imaging to pinpoint all the leaks throughout your duct system. The auditor works closely with the solutions technicians to ensure the ducts are sealed properly.

National Energy Audits uses various forms of sealants, closed-cell foam, foam board, dense packed cellulose, and duct mastic to seal all the unwanted cracks, holes and ducts that are the cause for your high energy bills and wasted energy.