HelloNation Features Insulation Expert Mike Mancuso on Why Air Sealing Should Precede Insulation

An article from HelloNation explains how sealing air leaks first can improve comfort, boost energy efficiency, and help manage moisture in the home.

CLARKS SUMMIT, Pa. /PRNewswire/ -- Why should homeowners air seal before adding insulation? A HelloNation article featuring insights from Insulation Expert Mike Mancuso of North East Industries in Clarks Summit, Pennsylvania, answers that question by showing why air sealing is the first step in improving comfort, energy performance, and the overall effectiveness of insulation.

Many homeowners start by thinking about adding more insulation when they want to cut energy costs or make their homes more comfortable. The article notes that while insulation is important, sealing air leaks first helps that insulation perform as intended. Without that step, conditioned air can still escape through hidden openings, limiting the value of new insulation.

The article uses a winter coat as an example. A coat cannot keep someone warm if it is left unzipped, and a home with air leaks cannot fully benefit from insulation for the same reason. Heated or cooled air can escape through gaps before insulation has a chance to slow heat movement. Air sealing closes those openings, while insulation helps resist heat transfer through walls and ceilings.

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According to the article, many homes have small openings that are easy to miss. Common leak points include windows, doors, attic access points, plumbing penetrations, electrical wiring, and other places where building materials meet. Each gap may seem minor, but together they can let a significant amount of conditioned air escape. Addressing those hidden issues first is why air sealing comes before adding insulation.

The article also says that unsealed leaks reduce the effectiveness of even high-quality insulation. Because moving air carries heat, insulation alone cannot fully regulate indoor temperatures when conditioned air is constantly escaping. A tighter building envelope created through air sealing allows insulation to work more effectively and supports better comfort in every season.

Reducing drafts is another benefit highlighted in the piece. Rooms that feel cold in winter or too warm in summer often point to unwanted airflow through ceilings, exterior walls, windows, or attic openings. Air sealing helps lessen those drafts, making indoor spaces more comfortable without constant thermostat changes.

The HelloNation article further explains that pairing air sealing with insulation can help create more even temperatures throughout a home. If air leaks are not properly sealed, conditioned air may not spread consistently from room to room. Once those leaks are addressed, insulation can better slow heat transfer and support a more balanced indoor environment.

Better energy performance is also part of the recommendation. Heating and cooling systems work more efficiently when less conditioned air escapes. The article notes that reducing air leaks can ease strain on HVAC equipment while helping maintain comfortable indoor temperatures. Although many factors influence energy performance, sealing leaks before adding insulation is presented as an important part of the overall plan.

Moisture control is another reason the article recommends air sealing before insulation is installed. Air leaks can carry moisture into attic spaces and wall cavities, especially when weather changes. Over time, excess moisture can reduce insulation performance or contribute to mold growth and damage to building materials. Limiting unwanted airflow helps reduce those risks and supports the long-term effectiveness of insulation.

The article concludes that every home has different air sealing needs depending on its age, design, and condition. Older homes often develop more leaks as materials expand, contract, and wear over time, while newer homes can still have small gaps that affect comfort. Completing air sealing before adding insulation allows both improvements to work together to reduce drafts, promote more even temperatures, improve energy performance, and better control moisture over time.

Air Sealing Before Adding Insulation features insights from Mike Mancuso, Insulation Expert of Clarks Summit, Pennsylvania, in HelloNation.

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