If you’re planning on living in a house long-term, proper insulation is a wonderful investment. There are numerous methods of attic insulation—the merits of it should be considered, and it might be wise to weigh the options. According to Home Advisor, the four most common types of insulation are spray foam insulation, blown in insulation, fiberglass batts, and reflective or radiant barriers. The type you decide to install, along with how much, will ultimately reflect how much it will cost to insulate an attic.

How Much Does it Cost to Insulate an Attic?


Spray foam insulation closes gaps and leaks in already insulated walls. This is a fairly inexpensive method at around 35 to 55 cents per board foot for open-cell spray foam and generally $1.00 to $2.00 per board foot for closed-cell spray foam. If done professionally, it could even save around $500 in energy costs per year.


Blown in insulation is generally made from cellulose, which is made from recycled paper and cardboard materials. This moisture-resistant method will cost around $500 to do it yourself and about $1,500 to $2,000 to call a professional for the average sized home (1,500 square feet). Always go with a moisture resistant method, otherwise your home may face sever mold and water damage over time, which is both costly and dangerous to your health.

How Much Does it Cost to Insulate an Attic?


Fiberglass batts are the cheapest, easiest home insulation option, and typically the most common among residential dwellings. The only tricky element about this option is installing it so that there are no tears or loose corners. It costs about $0.64 to $1.19 per square foot, bringing your estimate to about $145 to $200 if you do it yourself. For professionals, you’re looking about $300 to $500. However, since fiberglass is toxic to the touch, and could lead to health problems when not handled properly, we highly recommend using a professional service.

Radiant/Reflective Barriers

Radiant and reflective barriers are for those in warmer environments because they reduce heat gain and work to combat higher temperatures more so than other insulation methods. This type of insulation has many variants, but the average barriers costs around 15 to 30 cents per square foot. You’re looking at $175 to $325 to insulate an average 500 square foot attic yourself and between $500 to $750 to get it done by professionals.


It’s important to know that the cost varies, depending on what you want to insulate—whether it’s walls, attics, garages—and how many square feet need to be insulated. Even if you opt for more expensive materials at first, the price will be reflected in lower utility bills in the long run. We encourage you to weigh the options and choose what’s best for your needs.