Air Infiltration Sealing

Air Infiltration Sealing

What Is Air Infiltration Sealing?

  • Identifying and sealing gaps and cracks in a building’s envelope where unwanted air enters or escapes.
  • A crucial step in preparing new builds or remodeled spaces for inspection and qualification for rebates.
  • Reduces drafts, improves energy efficiency, and helps meet IECC code compliance.

Uncontrolled air leakage is most often identified through professional blower door testing, which measures how much air is entering or escaping the building envelope and highlights areas for targeted sealing work.

Why Air Sealing Is Important

Air leaks are one of the biggest sources of energy loss in both residential and commercial buildings. Without proper sealing:

  • HVAC systems work harder
  • Indoor comfort is inconsistent
  • Blower door testing often fails
  • Utility bills increase

Our team performs detailed insulation inspections to ensure the thermal barrier is continuous and work done during sealing delivers lasting performance. We use proven methods to seal common infiltration points like framing joints, utility penetrations, attic bypasses, and rim joists—ensuring a tight building envelope and smooth inspection process.

Benefits of Air Infiltration Sealing

  • Improves blower door test results
  • Reduces energy loss and monthly utility bills
  • Helps meet energy code and IECC compliance
  • Boosts comfort and indoor air quality
  • Required or recommended for rebate programs like Mass Save®

Why Choose Us for Air Infiltration Sealing?

Independent, third-party energy testing professionals helping builders meet energy codes and performance standards since 2015!

Trusted by contractors, builders, and developers across the region for reliable energy consulting and insulation inspections.

Quick turnaround times, clear reporting, and expert service to keep your new construction or renovation project on track.

Failed a blower door test? Losing energy through air leaks?

Call us at (567) 742-4410 or request an estimate online to schedule your professional air sealing service!

JB’s Home Energy will help you build better, pass inspections, and save on utility costs.

Frequently Asked Questions

When should air infiltration sealing be done?

Before drywall installation and ideally before final blower door testing. It’s also effective in existing homes with comfort or draft issues.

Will air infiltration sealing help pass blower door tests?

Yes—air sealing directly improves airtightness, which is essential for passing code-mandated blower door tests.

What areas do you typically seal for air infiltration?

Common areas include attic accesses, rim joists, wall penetrations, top plates, electrical boxes, and more.

Is air sealing included in Mass Save® rebates?

Yes, especially when paired with insulation upgrades and verified through testing.

How long does air infiltration sealing take?

Most projects take a few hours to a day depending on the size of the property.

What Our Clients Say

Trusted by builders. Real reviews from verified and satisfied customers.

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Lauren E. Gibson profile picture
Lauren E. Gibson
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Josh and his team made it incredibly easy to leverage Mass Saves rebates for our home renovation in Cambridge, MA. Their team was reliable and responsive throughout the 1+ year process. Would highly recommend them to any homeowners!
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Adam G. profile picture
Adam G.
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Have worked with Josh and team on 2 different construction projects in Boston. Communication could not be clearer or faster! They are experts in a field that is necessary but difficult to navigate. Cannot recommend them enough for anyone looking for home energy solutions!
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Nathan Ensey profile picture
Nathan Ensey
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These are the go-to folks when it comes to home energy assessments!
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Saumil Shah profile picture
Saumil Shah
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Very quick response and also great to work with. They answered all of my questions and gave great explanations about the results.
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Wen-Hung Lin profile picture
Wen-Hung Lin
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The owner of the company is super knowledgeable and responsive. While other companies told me I didn’t qualify for rebates, Josh told me otherwise and guided me through the process. In the end he was right, I got a sizable rebate. I highly recommend working with them and would definitely use them again for future projects.
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Jake Santilli profile picture
Jake Santilli
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Blower door test Fast service, and did a really nice job
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Marc Savatsky profile picture
Marc Savatsky
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★★★★★ 10/10 As a builder and real estate developer, I work with a lot of consultants, and JB’s Home Energy stands out. Josh and his team supported my six-unit multifamily new construction project from the very beginning, getting involved during design and helping us evaluate and compare different energy and compliance options before we ever broke ground. They were reliable, stayed on schedule, and communicated clearly throughout the process. The blower door testing at the end was seamless and executed flawlessly. I would not hesitate to work with Josh’s team again and would recommend them without reservation.
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marc draisen profile picture
marc draisen
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We enjoyed working with JBHE and Tacoma Energy over the past year to obtain our maximum MassSave rebates. They were professional, timely, pleasant, and responsible. The home energy installation, assessment, and rebate process in Massachusetts can be complex, and these folks always made it clear and easy for us to navigate. I would highly recommend Josh and Robin! Marc Draisen Roslindale, Massachusetts
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Eli Adams profile picture
Eli Adams
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I would highly recommend using JB's Home Energy. Josh and the rest of his team were extremely responsive. They streamlined the entire rebate process. I ended up receiving a much larger rebate than I ever anticipated
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Proud American profile picture
Proud American
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JB was thorough and quick to get on the job. Highly recommended. Here in Michigan, they performed my blower test, professionally and quickly. Very easy to work with.

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Duct-EZ ®

An alternative spray system that seals all supplies, panned or open cavity HVAC air returns, inside or out to create a safe, environmentally sound Heating Ventilation Air Conditioning System.

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