AirTight™ Retrofit Foam Insulation adds tremendous R-value to exterior walls, achieving up to R-13 in 2 x 4 walls and up to R-21 in 2×6 walls. Additionally, AirTight™ Retrofit Foam Insulation reduces energy use in buildings beyond its stated R-value because AirTight™ Retrofit Foam:

• Reduces moisture infiltration through air leakage.
• Minimizes dew point problems and condensation.
• Avoids thermal bridging & resists heat movement in all directions.
• Provides reliable performance under varying conditions.

There are very few things that homeowners can do in the way of home improvement that will actually yield a return on investment. With energy savings of up to 50%, AirTight™ Retrofit Foam can not only pay for itself, but can actually save you money for the entire life of your home.


AirTight™ Retrofit Foam is installed by trained applicators that are familiar with the detailed process of injecting insulation into existing wall cavities. Depending on the design of your home, your AirTight™ Retrofit Foam applicator can drill ½” diameter holes into your exterior wall cavities, allowing access for the foam application. The injection foam application can be made from the interior or exterior of the building, depending on whether the interior or exterior finishes are to be renovated. Many types of construction can be retrofitted, from wood frame, metal frame, and masonry among others.

The actual process is quite simple. After the ½” diameter holes are strategically drilled, your AirTight™ Retrofit Foam applicator will use specialized equipment to inject the 2 component insulation system into your existing wall cavity. Because our special formulation goes in as a liquid, it is able to run to the bottom of the wall cavity where it then begins to expand 50 times its original volume, allowing the foam to completely fill the entire cavity.

AirTight™ Retrofit Foam applicators are trained to time their injections to minimize any chance of bowing or blowing off any interior finishes. As the foam is applied in lifts to fill the wall cavities, it makes a complete bond with the interior and exterior finishes, eliminating air movement into and through the building envelope, making the building more energy efficient.

AirTight™ Retrofit Foam applicators are also trained to use infrared imaging to help minimize voids.

Once the application process is complete, the refinish of application holes can be easily repaired. This process is generally the responsibility of the homeowner.

Installer will use a thermal imaging gun and ensure that no gaps remain after installation is complete. If gaps remain installer can drill new holes to fill any remaining gaps. This process should be done within 15 minutes of initial installation.

*This application is not fit for all structures

What is an AirTight Retrofit Home?

Lapolla AirTight™ Retrofit Foam approved applicators have an aptitude for building science solutions. All approved applicators undergo extensive training to ensure they are qualified to recommend the right solution for each situation they encounter and to also ensure their ability to perform professional energy efficient upgrades for their customers. At Lapolla, our management staff and network of regional account managers have decades of experience in the insulation and spray foam industry, further insuring the success of each and every Lapolla AirTight™ applicator.

Lapolla AirTight™ approved applicators value a collaborative approach to evaluate, design and delivery air tight homes to their customers. With the addition of AirTight™ Retrofit Foam Insulation and/or AirTight™ Sprayfoam, homeowners gain “peace of mind” that their home delivers maximum protection against energy loss and maximum comfort for their family.