Spray Foam Insulation Guide

Spray Foam Insulation Guide

Walls, roofs and foundations function as environmental separators keeping the outside out and the inside in. To fulfill this function walls, roofs and foundations need to be able to handle water, air, vapor and heat (see Figure 1).

Unlike fiberglass insulation that attic insulation air to pass through gaps, spray foam creates an airtight seal reducing energy loss which helps homeowners save money on heating and cooling bills year after year. Additionally, it prevents moisture from entering the home and inhibits mold growth, creating a healthier indoor environment.

Spray foam insulation is made up of two liquid components, isocyanate foam and polyol resin that technicians mix onsite with a hose, compressor and other specialized equipment. Once mixed the chemicals react quickly, expanding and curing to form a rigid insulation layer that fills gaps, cracks and crevices.

Foam insulation can be used in new construction or retrofit applications as well as existing homes. It can be installed over a variety of substrates including wood frame, metal stud, concrete and drywall.

Two common types of spray foam insulation include low density open cell and high density closed cell. Both work for most climates. In IECC climate zones 5 and higher high density closed cell spray foam acts as an additional condensation control and Class II vapor retarder. The closed cell structure of this insulation also enhances the structural integrity of walls and floors.

Coastline Insulation
268 Serenoa Rd Unit 2B, Santa Rosa Beach, FL 32459
(850)-565-1027

Blown-In Insulation Installation Tips

Attic insulation is one of the most efficient and cost-effective ways to insulate an attic or existing wall cavity. Made from cellulose, fiberglass, or mineral wool, it’s applied using a blowing machine that evenly distributes insulation material, filling every gap for complete coverage.

This method is especially popular for older homes or hard-to-reach spaces where traditional insulation batts may not fit properly. When installed correctly, blown-in insulation significantly improves energy performance and indoor comfort.

Ensuring a Proper Installation

Before installation, check for air leaks, moisture issues, and proper ventilation. Addressing these ensures the insulation performs effectively. The material’s loose-fill design provides flexibility and adaptability to irregular surfaces, preventing heat loss.

One advantage of blown-in insulation is that it can be installed over existing materials without major renovation. It also offers eco-friendly benefits since many cellulose options are made from recycled paper.

Always wear protective gear and maintain even coverage during application. Hiring professionals guarantees optimal depth, uniform density, and long-term efficiency—helping homeowners enjoy lower energy bills and consistent comfort year-round.

Spray Foam Genie Detroit
2241 Star Ct, Rochester Hills, MI 48309,
(313) 217-5028