Air sealing

Advanced air sealing that stops drafts, lowers bills, and improves your air quality

Our building scientists use blower-door testing and infrared imaging to find every gap, crack, and unsealed seam in your home — then seal them systematically from the attic floor to the basement sill plate. When recommended through a Home Energy Solutions audit, Energize CT rebates cover 75-100% of the cost for eligible Connecticut families.

4.9
Seal every leak
What it is

Finding and sealing every gap in your home's envelope

Air sealing means closing every gap, crack, and unsealed seam that lets conditioned air escape or outdoor air in. Our building scientists pressurize your home with a blower-door fan and use infrared imaging to pinpoint the exact source of every leak.

Then we seal them systematically — attic floor to basement sill plate. When recommended through a Home Energy Solutions audit, Energize CT rebates can cover 75-100% of the cost for eligible Connecticut families.

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What improves after sealing

Drafty rooms become consistently comfortable

Cleaner, drier indoor air

Lower heating and cooling bills

Ice dam risk reduced at the attic floor

Rebate-eligible through Energize CT

How it works

From the first test to the final seal: how we do it

blower-door-test

DIAGNOSTIC

We find every leak with diagnostic equipment

A blower-door fan and infrared camera map your home's leaks precisely. We pressurize or depressurize the house while thermal imaging reveals heat flow through walls, the basement, and the roof deck — identifying rim joists, attic penetrations, recessed lighting, and duct connections before any sealing begins.
  • Blower-door fan creates measurable pressure difference to reveal air movement
  • Infrared imaging pinpoints leaks at rim joists, attic penetrations, and recessed lighting
  • Complete leakage map of your home's envelope guides every sealing decision

SEALING WORK

We seal systematically, area by area

Attic, basement, and living spaces each get a targeted sealing treatment. In the attic we foam and caulk holes and penetrations, then reinforce insulation; in the basement we spray foam sill plates and seal plumbing and wiring; in living spaces we foam gaps, caulk frames, weatherstrip doors, and add outlet foam sheets.
  • Attic: urethane foam and caulk at penetrations, plus insulation reinforcement
  • Basement: spray foam at sill plates and around plumbing, wiring, and cracks
  • Living spaces and ducts: foam gaps, caulk frames, weatherstrip, and seal duct leakage
What changes

What air sealing does for your home

Fewer drafts Consistent comfort

Sealed gaps at the rim joists, basement sill plate, attic floor, ducts, windows, and doors keep conditioned air inside and stop unwanted outdoor air from entering. Rooms that were always drafty become consistently comfortable.

Healthier air Cleaner, drier air throughout your home

Sealing the basement blocks the intrusion of harmful air associated with dampness, heating fuel, and furnace combustion from being drawn up into your living spaces. You get the immediate benefits of improved air quality and reduced humidity.

Lower energy bills Your heating and cooling system runs less

By sealing off gaps and crevices you reduce the energy needed to heat and cool your home, which leads to lower energy bills and a more sustainable living environment. The efficiency gains are immediate and long-term.

What families say

Connecticut families on their air sealing experience

4.9
David Lasecki Jan 12, 2026
Written by my mother who recently had work done on her house: "I highly recommend HCP! The crew were knowledgeable, and professional from audit to completion of project. They answer any & all questions or concerns. They cleaned all areas worked on leaving my home pristine daily. Customer Service is OUTSTANDING, especially Lucy B. who was so informative & friendly. So impressed with this company, they not only did my insulation but replace my windows as well! Thank you so much Mr. Wyatt for helping me make my home energy - efficient!!!"
Christina Dobi Oct 22, 2025
I never thought I would feel so moved to leave a review about an insulation company but Home Comfort Practice was so wonderful to work with. Joe came out to create a plan of what we needed to do to improve insulation in our home and then took time to answer all my questions and concerns. The crew Juan, Alvaro and Gio were awesome, they took precautions to contain any mess and were great at communicating along the way, they take pride in their work and are super dedicated. I spent a lot of time comparing and deciding which company to choose and I'm very happy with my choice. Thank you guys!!
Jane Feb 12, 2025
They completed weatherization projects at my house for two days. Jaye, our Field Supervisor could not have been better! He was so professional and communicated with us every step of the way. Everything was done to perfection and they cleaned up all areas each day!! Jaye’s team couldn’t have been better. They all were so friendly and respectful! I cannot say enough about Home Comfort Practice. We appreciate all your hard work! Thanks Jaye!!
What you may qualify for

Insulation rebates cover 75-100% of your project

Between Energize CT and federal tax credits, most CT families pay little to nothing for qualifying insulation work.

Energize CT insulation rebates

75-100% covered
Technician spraying fiberglass insulation in an attic

As an Energize CT Authorized Contractor, HCP helps you access rebates funded by your utility bill. Your home energy audit copay is just $40.

$40 Audit copay
$2.00/sq ft Insulation rebate
  • $2.00/sq ft insulation rebate
  • 75-100% of total project cost covered
  • Includes attic, wall, basement, and crawl space
Energize CT details

Financing for insulation projects

Low-rate financing
Bright renovated room with insulation

For the portion not covered by rebates and credits, flexible financing helps you start insulating now.

  • Smart-E Loan low fixed rates for energy improvements
  • On-bill financing pay through your monthly utility bill
Financing details

CT HIC License HIC #0644515 CT HTG License HTG #0303270-S1

Energize Connecticut — programs funded by a charge on customer energy bills.

Common questions

Common questions about air sealing

How do you find the leaks in my home?

What areas of my home get sealed?

How long does air sealing take?

Will air sealing make my home too tight?

Is air sealing worth it without adding insulation?

Can I get rebates for air sealing through Energize CT?

Can you really insulate my home at no out-of-pocket cost?

What happens during a Home Energy Solutions (HES) visit?

Home Comfort Practice HVAC specialist ready to help

Talk to a specialist

Call (203) 450-3000 or request a free estimate and we'll follow up quickly.

4.9

Ready to stop the leaks?

When recommended through a Home Energy Solutions audit, Energize CT rebates cover 75-100% of air sealing costs for eligible families.

Energize CT Authorized Contractor Eversource Authorized BPI Certified Licensed HIC #0644515 BBB A+
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