How much does attic air sealing cost?

Attic air sealing is one of the most effective and affordable ways to improve your home’s energy efficiency. By closing gaps, cracks, and leaks in your attic, you can prevent conditioned air from escaping and outside air from entering—reducing your heating and cooling bills year-round. But how much does attic air sealing cost?

In this post, we’ll break down the factors that influence pricing, typical cost ranges, and why this investment can pay off in comfort and savings.

Air sealing your attic involves locating and sealing leaks around fixtures, ducts, vents, and wall or ceiling penetrations. These areas often allow air to flow freely in and out of your home, making your HVAC system work harder to maintain comfortable indoor temperatures.

Professional air sealing includes:

• Identifying air leaks using diagnostic tools
• Sealing gaps with caulk, spray foam, or weatherstripping
• Adding insulation if needed to further improve energy efficiency

When paired with proper insulation, attic air sealing helps create a thermal barrier that keeps your home comfortable year-round.

Average Cost of Attic Air Sealing

The cost to air seal an attic depends on a variety of factors, but most homeowners can expect to pay between $1,200 and $2,500 for professional attic air sealing. Here’s what influences that range:

1. Size of the Attic

Larger attics require more time and materials to properly seal, which increases the cost. A small attic in a 1,200 sq ft home may cost around $1,000, while a larger attic in a 2,500 sq ft home could exceed $2,000.

2. Accessibility

If your attic is difficult to access or has tight spaces, angled ceilings, or obstructions, labor time increases, which can raise the overall cost.

3. Amount of Air Leaks

The more leaks and gaps that need sealing, the more labor and materials required. Homes with older construction often have more leaks to address.

4. Type of Sealing Material

Spray foam and specialized caulking materials vary in cost. High-performance or eco-friendly sealants may come at a premium.

5. Additional Services

Sometimes air sealing is bundled with attic insulation upgrades. Adding or replacing insulation can increase the cost but also boost long-term energy savings.

Is DIY Attic Air Sealing Cheaper?

Homeowners can attempt to seal attic leaks themselves, but this approach has limitations:



• Finding leaks without professional tools can be difficult
• Improper sealing may leave gaps untouched
• DIY spray foam applications can be messy or ineffective

Professional attic air sealing ensures the job is done thoroughly and correctly, often resulting in better long-term savings and performance.

Why Attic Air Sealing Is Worth the Cost

Air leaks can account for up to 30% of your home’s heating and cooling loss. Sealing them helps:

• Reduce energy bills
• Increase comfort (no more drafty rooms!)
• Extend the life of your HVAC system
• Improve indoor air quality by preventing pollutants from entering



Many homeowners in the Kansas City Metro area see a return on investment in under two years through lower utility bills.

Combine Air Sealing with Insulation for Maximum Results

While air sealing addresses airflow, insulation improves thermal resistance. When you combine both, you create a tightly sealed and energy-efficient building envelope. At Insulation Pros, we offer bundled attic insulation and air sealing services designed to optimize home comfort and energy savings.

Get a Free Attic Air Sealing Estimate Today!

At Insulation Pros, we specialize in helping homeowners across the Kansas City Metro reduce energy waste and improve comfort with professional attic air sealing and insulation services.

Contact us today for a free quote and find out how much you could save!