Attic insulation contributes to an energy-efficient home because it prevents rising heat from escaping through the roof. It also prevents damaging ice dams, which form when hot attic air melts snow that refreezes along the roof’s edge. Insulation comes in many forms, including spray foam, rock wool, fiberglass, EPS, XPS foam board, and cellulose. Fiberglass and cellulose are the least expensive, so which is best for increasing household energy efficiency?

Fiberglass

Fiberglass traps air within minuscule glass fibers to reduce the heat transfer rate. It is relatively easy to install because the sheets are simply placed within the walls. Fiberglass is very itchy and irritating to the skin and offers no resistance against fire, insects, rodents, mold, or mildew. Additionally, the material does not come with a lifetime guarantee and offers only minimal soundproofing capabilities.

Cellulose

The millions of cellulose cells making up this type of attic insulation provide natural heat retention. As with fiberglass, cellulose collects large amounts of moisture but is permeable enough for quick drying. Unlike fiberglass, cellulose is impervious to mold, mildew, fire, and rodent and insect damage. It is also completely non-toxic, will not irritate skin, and provides excellent soundproofing. Cellulose comes with a lifetime guarantee as well.

Which Is Best for You?

Cellulose and fiberglass attic insulation may have similar R-values at first glance; however, heat escapes fiberglass quickly in extreme cold, causing its R-value to drop. Cellulose does better in severe cold to retain this value. Its density is also ideal for protecting against drafts. While installing cellulose is more complex than installing fiberglass, it is the clear winner in regard to efficiency, home comfort, and resilience.

Attic insulation is one of the best things you can do to reduce your utility bills and your carbon footprint. Work with the experienced team at Ray St. Clair Roofing for unparalleled blown-in cellulose installations among other outstanding home services, including gutter protection and roof repairs. Call the family-owned and -operated company serving the Greater Cincinnati area for over 60 years at (513) 874-1234 to schedule an appointment. Visit the website for more information and like the Facebook page for great tips and the latest news.