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Benefits of Air Sealing Your Home

June 30, 2017

In the laundry-list of home improvement tasks, the benefits of air sealing your home may not at first rank high on your to do list. But imagine for a second: would you ever drive a car with a leak in the gas tank? Would you pour yourself an expensive glass of wine into a glass with a chip in it? If the answer is no, the benefits of air sealing your home should be something you consider for your next home reno project.

Repairing Air Seals For Any Leaksbenefits of air sealing windows air leakage testing or Cracks in Your Building Envelope

Air sealing your home is, at its simplest, plugging the holes that cause your home to lose its conditioned air and allow outside air to enter. Air can enter through cracks, improperly sealed doorways, or from old, inefficient weatherstripping. Through the process of air sealing, you detect any leaks or cracks in your building envelope, inside and out, and then repair them. In an era of rising electricity bills and a growing concern for the environment, the benefits of sealing air leaks in your home are many.

One of the biggest benefits of air sealing your home is that they are a cost-effective method of cutting your heating and cooling bills. As your dad might say, there's no point in air conditioning the whole block. Saving on your electricity bill while also preventing drafts and cold spots is one of the huge benefits of air sealing your home.

The second largest of the benefits of air sealing your home is simply that your HVAC system won't have to work so hard. If your drafty old home is full of leaks, your furnace will have to work twice as hard through the cold months to keep the indoor environment at a minimum temperature - and besides the expense, this causes more than its fair share of wear and tear on your HVAC equipment and could lead to costly repairs down the road.

Another of the many benefits of air sealing your home is that the same place where air escapes also allows things in - moisture being one of the biggest culprits. At its most harmless, moisture will raise the humidity level in your home and make your indoor environment uncomfortable. At its worst, moisture could be contributing to the growth of mold that could be seriously affecting you and your family's health. There are many more benefits to air sealing your home, but luckily there are some easy steps you can take to seal your home.

Common Areas Where the Benefits of Air Sealing your Home are Easily Apparent are:

  • Weatherstrip doors and windows - consider replacing old single pane windows with more efficient double pane windows.
  • Caulk and seal leaks where plumbing, ductwork, or wiring enters or exits your home.
  • Seal leaks around fireplace chimneys, the furnace, water heaters.
  • Weatherstrip in the attic and in open stud cavities

The first step in reaping the benefits of air sealing your home are to have an air sealing test done by a qualified professional. At GNI, our years of experience in air sealing and insulation have taught us to recognize where air is escaping from your home and to recommend the best solutions for you and your unique home. Our assessment often begins with the industry standard "blower door test" that depressurizes the home and causes outdoor air to enter more rapidly. Our technicians provide top-quality, reputable air sealing assessments that will result in noticeable benefits of air sealing your home: improvements in your heating bills AND in the comfort and health of your home environment.

Western Ontario

935 Keyes Drive
Woodstock, Ontario
Canada N4V 1C3

Phone: 1-800-265-1914

Fax: (519) 539-7946
TOLL FREE: 1-800-265-1914

Southwestern Ontario

7035 Industrial Drive
Comber, Ontario
Canada N0P 1J0

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1027 Elwell Park Road
Gravenhurst, Ontario
Canada P1P 1R1

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29 Ferndale Industrial Drive
Barrie, Ontario
Canada L4N 9V5

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103 North Port Road
Port Perry, Ontario
Canada L9L 1B2

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GTA & South Central Ontario

450 Industrial Dr,
Toronto (Milton), Ontario
Canada L9T 5A6

TOLL FREE: 1-800-265-1914

Eastern Ontario

1035 Moodie Dr #1,
Nepean, ON
K2R 1H4

TOLL FREE: 1-800-265-1914


259 Campbell Street
Sarnia Ontario
Canada, N7T 2H3

TOLL FREE: 1-800-265-1914

Niagara Region

6260 Don Murie St
Niagara Falls, ON
L2G 0B4

TOLL FREE: 1-800-265-1914


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Best of 2017

From reputation to responsiveness, HomeStars consistently ranks Great Northern Insulation at better than 95% for customer satisfaction. Thanks to everyone for the great ratings! 

HomeStars 2018

Best of 2018

For the second year in a row, HomeStars consistently ranks Great Northern Insulation at better than 95% for customer satisfaction. Thank you again to everyone!

Homestars Best of 2019 Award

Best of 2019

For the third year in a row, HomeStars ranked Great Northern Insulation at better than 95% for customer satisfaction.

Homestars Best of 2020 Award

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For four years now, HomeStars has ranked Great Northern Insulation at better than 95% for customer satisfaction.

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HomeStars has ranked Great Northern Insulation as a company that goes above and beyond in every aspect of business for the year of 2021.

Homestars Best of 2022 Award

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HomeStars has ranked Great Northern Insulation as a company that goes above and beyond in every aspect of business for the year of 2022.


GNI is the Authorized & Trusted Insulation and Air Sealing Installer for Lowe’s

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For the ultimate in high performance spray foam insulation, Insulthane® Extreme is the professional choice for residential, commercial, and industrial application. With improved thermal performance over other products, Insulthane® Extreme has an exceptionally low Global Warming Potential (GWP). Considered environmentally friendly, this next generation spray foam insulation is non-ozone depleting, and exceeds specifications of other HFC product alternatives.


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3MTM energy-saving products are designed to keep warm air in, and cold air out, while keeping energy bills down. Products optimize energy efficiency in buildings and homes; improve indoor environment for occupants; and effect the reduction of seasonal energy costs. 3M products are authorized for LEED credits (Leadership in Energy/Environmental Design).


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Mike Holmes and his son Mike Jr. (MJ) convert MJ’s bachelor bungalow into a two-storey home for MJ and his girlfriend Lisa. Choosing the newest materials and build techniques, the father and son team follow Mike’s famous motto – “Make it right.” The show can be watched on HGTV and DIY Network.


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