NOCO Blog

Breathe Easy: The Benefits of Air Sealing Your Attic

Air sealing an attic is a critical step in enhancing indoor air quality and energy efficiency in homes. This process involves identifying and sealing air leaks in the attic to prevent uncontrolled airflow between the attic and the living spaces below. Air leakage not only contributes to energy loss, making heating and cooling systems work harder than necessary, but it also provides a pathway for outdoor air pollutants, dust, and allergens to enter the home. By effectively sealing these leaks, homeowners can significantly improve the air quality inside their homes, reduce energy consumption, and enhance overall comfort.

According to the U.S. Department of Energy, sealing air leaks and adding insulation can save homeowners up to 15% on heating and cooling costs, or an average of 11% on total energy costs. This statistic underscores the direct correlation between air sealing, energy savings, and the reduction of air infiltration that carries contaminants.  Additional savings from additional insulation!

Air infiltration through attic leaks can introduce a variety of outdoor air contaminants into a home, including pollen, dust, mold spores, and even vehicular emissions in urban areas. The Environmental Protection Agency (EPA) reports that indoor levels of pollutants may be 2 to 5 times higher than outdoor levels, and in some cases, more than 100 times higher. This is particularly concerning given that most people spend approximately 90% of their time indoors. Air sealing the attic becomes an essential measure to mitigate these risks by limiting the entry points for pollutants.

Moreover, air leaks can create moisture problems that exacerbate indoor air quality issues. Moisture-laden air can enter through attic leaks, leading to condensation and mold growth. Mold spores are a significant indoor air contaminant that can cause a variety of health problems, from allergic reactions to more severe respiratory issues. By preventing moist air from infiltrating through the attic, air sealing helps maintain a dry and healthy indoor environment.

Additionally, air sealing an attic can help in preventing the infiltration of radon gas and other soil gases through cracks and openings. Radon is a naturally occurring radioactive gas that can enter homes through the ground and has been identified as the second leading cause of lung cancer in the U.S. by the EPA. Sealing leaks in the attic, in conjunction with a radon mitigation system if needed, can significantly reduce radon levels indoors.

Implementing air sealing in the attic also has the added benefit of preventing pests and insects from entering the home. Many air leaks are large enough to allow insects and even small rodents to enter, which can be a nuisance and potentially spread disease. By sealing these openings, homeowners can enhance the cleanliness and hygiene of their indoor environment.

In conclusion, air sealing an attic is a highly effective strategy for improving indoor air quality, reducing energy consumption, and enhancing home comfort. By preventing the entry of air pollutants, moisture, radon gas, and pests, homeowners can create a healthier and more energy-efficient living space. The statistics from the U.S. Department of Energy and EPA highlight the significant impact that air sealing can have on energy savings and indoor air quality, making it a worthwhile investment for homeowners concerned about their health, comfort, and the environment.