Best Applications for Spray Polyurethane Foam

Spray polyurethane foam

Spray polyurethane foam (SPF), available in either open-cell or closed-cell, provides stellar insulating performance. It expands to fill gaps, cracks and holes, creating a thermal barrier around a building’s envelope. This results in reduced air and moisture infiltration.

There are many additional advantages to sprayed insulation as well. For example: Energy efficiency, sound dampening, and durability. Homeowners will also benefit from reduced heating and cooling costs.

SPF Types & How It Works

There are three primary types of SPF: High-density, medium-density, and low-density.

Medium- and high-density, also called closed-cell foam has a higher R-value per inch (6.5), making it an ideal choice for exterior roofing, interior wall cavity fill, and unvented attic applications.

With a lower R-value per inch (3.5), low-density, or open-cell foam is often used for interior wall cavity fill and unvented attic applications. Both open-cell and closed-cell require professional installation.

A basic understanding of R-values is helpful when comparing any insulating material. R-value measures the insulation’s ability to reduce heat flow through a building’s envelope. The higher the value, the better. For recommendations, visit ENERGY STAR.

Source: “Recommended Home Insulation R-Values,” ENERGY STAR.GOV, 1999.

Spray polyurethane foam is made by mixing and reacting two liquids – “A” and “B” – to create foam. Mixing takes place on site using truck-mounted equipment. A professional insulator contractor then sprays it into place using special tools.

SPF expands on contact to form air and moisture barriers. This helps ensure a consistent temperature year ‘round – ultimately creating a comfortable living or working environment.

Where is Spray Polyurethane Foam Used?

Attics

Adding SPF to the attic is cost-effective. Because it expands, spray foam can effectively fill even the smallest gap, crack or hole in attics and crawlspaces. Combined with attic air sealing, it can also provide a moisture barrier, reducing the risk for mildew or mold growth.

Roofing

Spray polyurethane foam is often used in combination with protective coatings and other materials in the construction of a cool roof. According to the U.S. Department of Energy, cool roofs can save homeowners money on cooling costs in hot climates, but may increase costs in colder climates.

Interior Wall Cavities

Spray foam can be installed in a home’s wall cavities during new construction or renovations. There it can fill small cracks. The benefits for this project include sound proofing, energy efficiency, and increased comfort.

For more information on this and other types of insulation, contact Banker Insulation at (602) 273-1261 for a free quote.

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