Aeroseal Setup

Seal Your Building Envelope In 180 Minutes At Half The Cost While Smashing Any ENERGY STAR®, LEED, Passive House, ZERH, Or Net Zero Requirement

Without overspending on caulk or spray foam that can take days or even weeks to install, stealing your crew's time

And never worry about door blower test results again.

What Builders Are Saying:

I love how Aeroseal saves me time and money on my duct work. In the past duct blaster tests stressed me out because even if I was super thorough on my duct sealing I was never 100% sure it would pass. Now I am 100% sure and I save approximately $1500 on sealing. I simply foil tape my seams and then Aeroseal. Done. This, combined with the promise of significantly improved air quality for my clients, makes Aeroseal a no-brainer for me.
John McCracken
John McCracken
McCracken Professional Builders

Manually Sealing the Building Envelope Is Time-Consuming, Costly, And Full Of Uncertainty

With Increasing Complexities And Stricter Requirements, Passing Door Blower Tests May Mean You Have To Rethink Your Approach

4 Corners Aeroseal Icon

We are professional home builders and insulators who have built over 120 homes in La Plata County Colorado since 2002 and we specialize in energy efficient homes.

And for years we've sealed building envelopes—the HARD way.

As a builder, you probably know what this means:

Spending tens or hundreds of hours of labor and using expensive tapes and mechanically fastened air barriers, all of which cost THOUSANDS of dollars.

And it's NOT easy. Framers, HVAC, plumbers, insulators, electricians, etc. all are involved, which means you, the builder, are left to manage the outcome.

And as homes are becoming more complex, so does the building envelope. Everyone needs to be well-trained on where to seal and what products go where.

And when everything's done, the results are inconsistent and you're STILL left wondering if the home will pass inspection.

You might be thinking one of two things:

  1. "My guys have been doing this for years. We use the best tapes, caulks, and membranes and we're the best at what we do,"
  2. "I don't need to pass a door blower test."

Number 1, no doubt your crew is good, BUT are you 100%, take-Friday-off-and-relax-all-weekend-in-the-yard CONFIDENT that the building will pass inspection, EVERY time?

Even IF you said yes, how much did that cost, not just in labor and materials, but in what your crew could have been doing all that time instead?

OR, maybe you've barely passed an inspection, or even failed one and had to SCRAMBLE to fix it.

Which causes delays, makes the owner unhappy, and costs you more money.

But that's okay, we've been there. The requirements are steep.

AND they're getting steeper every year.

What worked this year might not work next year and you could find yourself in a serious bind.

We don't want that to happen to you, but what is it going to take?

Number 2, if you're not worried about a door blower test, what kind of home do you want to build for your customers?

If you want to deliver THE tightest building envelope so you stand out from your competition, you're looking at spending 60-80 man-hours, plus the cost of caulk and spray foam to achieve it the traditional way. What's that going to cost you?

The Difference A 1 Square Inch Hole Makes

ONE THIRD of the cost of heating and cooling leaks through holes in an average house.

4 Corners Aeroseal Air Leakage
Interior Temperature: 70° F, Relative Humidity: 40% (Diagram: Building Science Corporation)

Any holes in your envelope will cause HVAC systems to work harder to maintain temperatures, which makes the entire home less efficient and more expensive.

AND, if there's a hole, air infiltration from the outside occurs bringing in dust, allergens, and other airborne pollutants.

Plus, air currents account for 98% of all water vapor movement in a building. Controlling the air means preventing unwanted moisture coming in from the outside.

How much moisture, for example, is transferred through a 1-inch hole exactly? 30 FULL QUARTS over a month.

And too many holes means you won't pass your door blower test. That's why you need an "air shield", or an Aeroseal.

How To Recover Thousands In Labor Costs While Sealing The Envelope, Become 100% Confident You Will Pass Every Inspection,

AND Deliver A More Efficient, More Comfortable, Higher Quality Home That Will Thrill Your Customers

Quick question for you first:

How would it feel to get door blower test results like this every time?

Aeroseal & AeroSeal Door Blower Results

  • Without having to worry and wonder about durability or if it will last
  • Without a toxic sealant that off-gasses that would leave lasting odors
  • Without manual envelope sealing so you can do it faster, simpler, cheaper, and more effectively
  • Without having to incur more costs and last-minute scrambling because of a failed inspection
  • And if the building is in La Plata County, the City of Bayfield, or the City of Durango, our Aeroseal results are accepted so you don't have to call the inspector to come to the property

ALSO, when everything is finished, the home owners will thank you because:

  • The home will be less susceptible to mold and mildew, giving them peace of mind.
  • They will breathe with ease as the home blocks out pollen, allergens, and even wildfire smoke
  • They will sleep better at night with fresher, cleaner air that's warmer in the winter and cooler in the summer with fewer drafts
  • The home will reduce outside noise by 40%, providing comfort and quiet living
  • They will see an immediate savings of up to 1/3 on heating and cooling

How It Works

Fast, Clean, Cost-Effective, And Safe

Aeroseal is an interior applied air sealing system that seals all building envelope leaks up to 1/2". The waterborne acrylic sealant is applied by pressurizing a targeted building area, then spraying the aerosolized sealant into the pressurized space.

The sealant is self-guided to the edges of visible and invisible leaks creating a seal, not by packing the gap, but by accumulating across the surface of leaks. The sealant is applied within 180 minutes and dries before system clean up is complete allowing construction to resume shortly after the process is complete with little to no impact on standard construction schedules.

The system measures the envelope leakage in real time, enabling the system to dial in specific requirements for air leakage and guarantee the results.

Aeroseal Before & After
Aeroseal Before
Aeroseal After
Aeroseal After
Aeroseal Before
Aeroseal After
Aeroseal After
Aeroseal Before
Aeroseal After
Aeroseal After

In 4 Simple Steps

To Gain Dialed-In, Precise Envelope Air Sealing In Just A Few Hours

Aeroseal Step 1
Prep & Setup

In general, the builder is responsible for masking the areas that should not be sealed.

We'll then set up the equipment, including the blower door, emitters, hoses, and the Aeroseal machine.

Aeroseal Step 2
Pressurize & Apply

Using a blower door, the space is pressurized. After that, a computer controls the entire process including controlling the temperature, pressure, humidity, and distribution of sealant within the space during the process.

Aeroseal Step 3
Seal & Monitor

With the Aeroseal process, we see the results in real time. You have complete control over your desired level of air tightness and can achieve any level of tightness required. At the end of the process, a final blower door test is run to verify the sealing results. We then provides a Certificate of Completion that shows pre and post seal leakage.

Aeroseal Step 4

After the sealing is complete, work can resume in the space within 30 minutes. At that time, clean up of all equipment and removal of all tape and coverings can occur.

Real, Immediate, Certified Results

So You Don't Have To Schedule An Inpsection With The County

3-Bedroom DOE Challenge Home
3.1 ACH50
0.4 ACH50
Finished In 2.5 hours
Aeroseal Check Icon
Luxury Residential Home
2.2 ACH50
0.58 ACH50
Builder Saved Over $10,000
Aeroseal Check Icon
3-Story Row Homes
5.0 ACH50
1.6 ACH50
Passed After Failed Inspections
Aeroseal Check Icon

Average Of 82% Leakage Reduction

6 Units Completed In 1 Day, Saving Weeks Of Labor Costs

Aeroseal 82% Average Reduction

What Do You Get With Aeroseal?

Aeroseal Delivers Measurable Results
Measurable Results
As Aeroseal is applied, the results are displayed in real time. By incorporating a blower door, the Aeroseal system is able to dial in your desired leakage. It’s that easy and verified upon completion.
Aeroseal Is Fast
A Fast & Easy Process
From start to finish, the sealing process takes 60-90 minutes. In new construction applications, prep and clean up time is minimal – typically taking less than an hour. Once set up, the Aeroseal machine takes over and manages the sealing process through completion.
Aeroseal Is Cost-Effective
Slashed Costs
No more caulking needed to weatherize a space pre-drywall. Meet and verify air tightness requirements in real time, avoid sealing guesswork, and save on time, material and labor.
Aeroseal Is Durable
A Durable Product
Sealant achieves durability performance in 3 key areas: flexing, aging and compatibility in tests simulating 50 years of service.
Aeroseal Is Safe
And A Safe Product
GreenGuard Gold certified with Ultra-low VOC content and no off-gassing. Work can resume in the home within 30 minutes.

Air Sealing For Any Building

Aeroseal For Residential

Deliver Affordable Airtightness

For residential applications, reduced building envelope leakage means increased durability, reduced mechanical loads, improved energy efficiency and more economical renewable energy options. More importantly, a tighter building envelope can increase the comfort and overall indoor air quality within the building, leading to a better living environment.

Aeroseal For Multi-Family

Code Compliance Made Easy

Compartmentalization, especially at party walls, is critical to properly control fire, smoke, odors, sounds, and indoor air quality. A properly compartmentalized building allows ventilation systems to work more effectively, especially if the building uses a shared ventilation system. Aeroseal helps projects exceed new requirements at a more affordable cost, to qualify it for tax incentives in addition to increasing tenant demand and lease-up rates.

Aeroseal For Commercial

Fastest Path to Energy Savings

Aeroseal reduces up to 80% of the building leakage and more importantly, it is able to bring commercial buildings within the USACE specification for building envelope leakage. Using Aeroseal in new or retrofit commercial applications improves air sealing effectiveness, reduces labor costs, and improves the consistency of installation.

4 Corners Aeroseal & Insulation Guarantee Seal

4 Corners Aeroseal & Insulation 100% Guarantee*

That You'll Pass Your Door Blower Inspection Or We'll Fix It Until You Do At No Extra Cost

*Does not cover additional penetrations to the building envelope after installation.

Frequently Asked Questions (FAQ)

Who is this for?

4 Corners Aeroseal Envelope is for commercial and residential builders who need their building envelope sealed to meet any door blower test requirement. The service is completed during construction.

How durable is it and will it last?

Sealant achieves durability performance in 3 key areas: flexing, aging and compatibility in tests simulating 50 years of service.

When can it be applied?

Aeroseal can be applied at any time after the space can be pressurized. Different construction methods and climate zones will determine the proper time to apply Aeroseal. Rough-in or early stages of drywall is the most economical for application, but it can be applied to completely finished spaces.

What size hole will Aeroseal seal?

Aeroseal seals holes as large as 1⁄2”, and as tiny as a human hair. Aerosol sealing is extremely effective at sealing narrow gaps and extremely small holes that are typically not cost-effective or are missed during manual sealing.

What is the sealant made of?

The Aeroseal X1 sealant is a waterborne acrylic. The sealant is GreenGuard Gold certified and has been tested according to various ASTM standards and NFPA 285, for fire spread, smoke production, adhesion, antifungal properties, and tensile strength. The sealant is ultra-low VOC and has no off-gassing.

Is it safe to breathe the sealant during application?

No. During application, if a technician must enter the space while it is being sealed, they wear personal protective equipment (PPE). After the sealing is complete, the area is safe to enter without protective gear within 20 to 30 minutes.

But is it safe in general?

Yes, Aeroseal is GreenGuard Gold certified with Ultra-low VOC content and no off-gassing.

How is leakage measured?

The Aeroseal system uses a standard, single-point blower door test to measure envelope leakage throughout the process. The blower door is calibrated to meet ASTM Standard E779, E1554, CGSB-149.10-M86, EN 13829, ATTMA Technical Standard 1, NFPA 2001, RESNET and USACE.

How long does it take to apply Aeroseal?

Application time depends on what the target ACH is for the house. Typical applications take between 90 and 120 minutes.

How long after the sealing process can you work in the house?

The space needs to be aired out for 30 minutes after sealing. This is done by opening windows and running the fan. Work in the space can continue as soon as the sealing equipment is removed.

What surfaces need to be protected?

If Aeroseal is applied at rough-in or right after drywall is installed, there is very minimal preparation required. Vertical surfaces like walls and windows do not need to be covered. All designed openings, such as ducts, vents, electrical and plumbing penetrations, need to be covered prior to sealing. All finished horizontal surfaces need to be covered.

How much will this tighten the house?

Aeroseal can meet whatever tightness requirements the space is designed to handle. The Aeroseal technology provides real-time air tightness readings allowing air tightness to be specified and achieved every time. Aeroseal can seal houses just tight enough to meet any IECC code requirement or it can seal to levels below the Passive House standard of 0.6 ACH50.

Can the sealing be performed in cold weather?

Although the sealing equipment can heat the air as it seals, there are practical limits to aerosol sealing when it comes to weather conditions. Ideal outdoor temperature is 40° F or higher. Sealing can be done when the temperature is below 40° F, but additional steps may be required.

How much does it cost?

Pricing is based on square footage and other factors. See our Pricing Page for details.