Spray foam insulation plays a critical role in your home’s energy efficiency and comfort. It can reduce your energy bills and improve your household’s environmental impact. ENERGY STAR has several resources and tools to help you save money and reduce waste by improving your attic insulation.

Evaluate Your Insulation

ENERGY STAR recommends that you have a minimum attic R-value of R-30 or greater, depending on your climate. Before adding new insulation, check your existing R-value and thickness. If it is low, or if you find signs of moisture damage, mold, or compression, replace the insulation.

Choose the Right Type

There are many different types of attic insulation, each with its own applications and benefits. The best choice will depend on your household’s specific needs and preferences. Consider factors like R-value, cost, moisture resistance, and installation method.

Blown-In Insulation

Made from cellulose, fiberglass, or rock wool, blown-in insulation is installed using a special machine that blows the material into your attic space. It provides comprehensive coverage, and fills gaps and cracks more effectively than traditional batt insulation. It also resists moisture absorption and helps prevent mold and mildew. However, it can settle over time and decrease its R-value. It may also contain chemicals that can irritate the skin and eyes, so proper protective gear is recommended.

Spray Foam Insulation

This type of insulation is a two-part liquid that expands into foam when applied and fills gaps, cracks, and crevices. It offers a high R-value per inch, and can be used as an air barrier and to seal attic vents. It is more expensive than other types of insulation and requires professional installation. It is available in open- or closed-cell options.

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