Injection Foam vs. Spray Foam Insulation: What Are the Differences?

Injection Foam vs. Spray Foam Insulation: What Are the Differences?

Many homeowners ask us the difference between injection foam vs. spray foam. Generally, injection foam does not expand, whereas spray foam expands depending on the open or closed-cell structure. If you’re looking to install or replace insulation in your home, work with the top insulation contractor in Cumming, GA

Injection Foam vs. Spray Foam Insulation

Below are the three main differences between injection and spray foam insulation.

1. Installation Method

Injection Foam

Injection foam installation involves injecting foam into walls, roof cavities, and closed spaces. As a significant benefit, existing walls don’t need demolishing before installation. Additionally, injection foam takes less time to prepare than spray foam.

Contractors use injection foam, known as ArmorFoam, to insulate enclosed spaces. Injection foam insulation’s texture is similar to shaving cream. Before application, injection foam must undergo the mixing of a foaming agent, water, and resin.

Injection foam does not require removing the old or existing insulation. However, the contractor may remove cellulose insulation from the walls before installing it. As a result, the injection foam will fill and spread through the entire surface. 

Spray Foam

Spray foam insulation consists of chemicals derived from petroleum extracts. The foam combines two liquids, resulting in a chemical reaction to create polyurethane foam. Professionals can install spray foam insulation in open cavities, including walls, crawl spaces, and attics.

Before applying spray foam, the contractor will remove all the old fiberglass and cellulose. Spray foam adheres well to clean surfaces and fills spaces more consistently. With spray foam insulation, you can fill every gap and crevice.

Spray foam requires more preparation time than injection foam because the contractors have to move the furniture and other household items. Then, a plastic sheet or wrap covers the flooring to prevent spray foam from getting on them.

2. Air Sealing and R-Value

R-value and air sealing are crucial factors when comparing injection foam vs. spray foam.

Both injection foam and spray foam insulation create an air seal but have different R-values. Air leaks can increase your heating and cooling bills by up to 30%.

R-value indicates how well the insulation performs, so a higher value means better insulation. Although the R-value is important, it’s not the only deciding factor.

Injection foam insulation achieves an insulation rating of R-18, depending on the cavity size. In comparison, the R-value for open-cell spray foam falls between 3.6 to 3.9 per inch. The closed-cell spray foam has an R-value of 6 and 7.

3. Open-Cell vs. Closed-Cell Foam

Injection foam consists of an open-cell structure that will not expand. In contrast, spray foam has open and closed-cell types. Injection foam works best with enclosed and existing walls, whereas spray foam is better for open walls and crawl spaces.

Unlike open-cell foam, which remains lightweight, closed-cell tends to stay stiff and dense. Since open-cell insulation can move with the foundation of the house, it’s better suited for homes. A closed-cell structure works better on pole barns with exposed walls. 

Reliable Foam Insulation Installation in Cumming, GA

Anthem Insulation & Home has over ten years of experience installing insulation. Their contractors understand the importance of insulating your home. They offer free in-home consultations to discuss your specific needs and create a solution.Hopefully, now you understand the difference between injection foam vs. spray foam. Contact Anthem Insulation & Home today for more information on professional insulation installation in Cumming, GA and to know if it’s possible to over-insulate your house.

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