Spray foam insulation costs $0.50 to $2 per board foot depending on if you choose to seal leaks and gaps inside existing walls. They replace conventional stick framing for the walls and roofs.
They’re made in a factory and shipped to the job site. A SIPs panel is essentially a thick piece of rigid foam board between two sheets of plywood or OSB and designed to carry weight. The closed-cell insulation cost of a SIPs panel runs $7 to $12 per square foot. It averages an R-value of 5 at nearly twice the price of EPS, but it’s a better option for those looking to save space.
Its R-value is about a 4, a full point less than EPS and half as much as Polyiso, but at nearly half the cost of either of the other varieties, it has the highest insulation to cost ratio. Expanded Polystyrene (EPS)ĮPS costs $0.25 to $0.35 per board foot. That means a 4-inch-thick board costs $1.60 to $2.40 per square foot with an R-value of 32. Commonly used for flat roof installations in commercial projects, such as office buildings and apartments, it comes in thicknesses of 1 to 4 inches. Polyisocyanurate insulation costs $0.40 to $0.60 per board foot (1 square foot, 1 inch thick). You can generally purchase rigid materials in thicknesses up to 4 inches. Note that all foam types are sold and rated by the board foot, which is 1 square foot of material 1 inch thick. *SIPs come as a complete unit of around 4-inch thick insulation between plywood or OSB, so this price covers the whole thing, not just one inch thick of insulation. When installed properly, it’s excellent for all applications, from floors and walls to ceilings and roofs. Rigid installations make up all types of foam boards and structurally insulated panels (SIPs). Spray foam does an exceedingly good job of creating an almost airtight thermal barrier. Foam and Rigid Insulation PricingĪt $0.25 to $2 per board foot, open and closed cell foam are some of the most expensive types of insulation, but at a rating of up to R8 per inch of thickness, they’re also some of the best insulators on the market.
To pay for a professional installation, add $575 to $750 to that cost. To cover a typical 500-square-foot attic, you'll likely spend $125 to $500, with double-sided barriers being slightly more expensive. Materials alone run $0.25 to $1 per square foot, depending on the thickness and brand. Radiant barrier insulation costs $700 to $2,900 on average. For DIY projects, you can purchase bags of it at a home improvement store and rent a blower for under $100 a day. Made from white cellulose, you can find reclaimed and recycled varieties. Typically installed in attics, loose-fill insulation is also sometimes used to backfill wall cavities.
Blown-In Insulationīlown-in insulation costs $1,000 to $2,100 on average.
Since most homeowners are seeking to insulate previously built structures with drywall, blown-in insulation works best in the interior. You’ll typically fill the space with blown-in fiberglass, but in some cases, you can use spray foam. Cost of Cavity Wall Insulationįilling a wall cavity costs $1 to $2 per square foot on average. When installed tightly and securely, fiberglass batts improve energy efficiency by 25 to 30%. For a professional job, add $200 to $500 for labor, and you're looking at around $350 to $1,000 for 6 hours of work. So, for a 500-square-foot area, your estimate will vary between $150 to $700 if you do it yourself.
The average cost per square foot is between $0.30 to $1.50. Resource Centerįiberglass batt insulation costs $1,000 to $2,400. Find hiring guides, material costs, expert advice, how-to's and more.