Find top rated spray foam insulation installers in your area

Insulating a 1,500-square-foot home with spray foam usually costs $1,500 to $7,500. Your total covers both material and labor and changes with foam density, how the pro applies it, and local labor rates. When the job’s done right, you’ll see lower energy bills and enjoy a more comfortable house for years to come.

Adding a 1-inch layer of closed-cell foam to a 30×50 metal building costs about $1,600 to $2,400 for walls only. Extra labor, site conditions, and local rates can nudge that number higher. Talk with a spray foam pro in your area for a firm quote before you start.

For most homeowners, spray foam’s higher upfront price pays off. It seals out drafts and moisture, cuts energy bills, and even stiffens walls for extra strength. Those perks can boost resale value and create a healthier, more comfortable living space for decades.

Two inches of spray foam deliver an R-value of roughly 7 to 13—closer to 13 for closed-cell and nearer 7 for open-cell. R-value measures how well insulation blocks heat, so higher numbers mean better performance. Your actual result depends on the foam type and how the installer applies it.

The amount of spray foam you’ll need depends on your climate, square footage, and the R-value you’re aiming for. Colder regions or drafty homes usually call for thicker layers. A local insulation pro can run the numbers and recommend the right depth so you don’t overspend—or under-insulate.

Spray foam gives off strong odors and VOCs while it cures, so plan to stay out of the space for at least 24 hours. Pros wear full PPE and set up ventilation to keep fumes in check. Hire an experienced installer and follow their timeline before you move back in.