How much does it cost to have spray foam insulation installed
Dylan Hughes
Published Apr 07, 2026
Size in Square FeetPrice*1,000$440 – $1,5001,500$660 – $2,2502,000$880 – $3,0002,500$1,100 – $3,750
How much does it cost to spray foam a 2000 square foot house?
Size in Square FeetPrice*1,000$440 – $1,5001,500$660 – $2,2502,000$880 – $3,0002,500$1,100 – $3,750
How much does it cost to insulate a 1500 sq ft house?
Property owners should expect to spend about $975 to $11,250 to insulate a 1,500-square foot home. Take note that insulation costs may vary and can increase or decrease, depending on whether the insulation comes during or after the construction of the house.
How much does it cost to have spray foam installed?
Spray foam insulation costs range from $1.00 to $6.00 per square foot depending which part of the house you will insulate. For example if you are doing renovations in your first floor and will insulate the exterior walls of approximately 600 square feet.How do you estimate spray foam insulation?
To calculate how much foam you require to complete a job, multiply the square feet of area by the thickness of the foam to be sprayed. If the area is 1000 ft2 and you want to spray the foam 2½” thick, then multiply 1000 ft2 x 2½” which equals 2500 bf of foam required to spray the area.
How much does it cost to insulate a 1500 sq ft attic?
How much does it cost to insulate a 1,500 sq ft attic? With average costs ranging from around $1 per sq ft to $5 per sq ft (excluding structural insulation panels as these are best for new installations) expect to pay from $1,500 to $7,500 to insulate a 1,500 sq ft attic.
What is the R-value of 2 inches of spray foam?
R-Value In 2 Inches Of Spray Foam Open-cell spray foam is vapor-permeable. The R-value ranges from R-3.5 to R-3.6 per inch. The filling of a 2×4 cavity yields about an R-13.
Can I spray foam myself?
The answer is yes, but drywall needs to be removed before you can install the foam. … As you can see, it is crucial to remove drywall before installing spray foam insulation. You can remove drywall yourself, of course, but this is a messy and time-consuming job.Is spray foam worth the investment?
Spray foam insulation is typically two to three times more expensive than cellulose or fiberglass insulation. … Spray foam insulation does cost more than traditional options, but over time it pays you back in energy savings, and you can’t really put a price on the comfort of your family.
What are the disadvantages of spray foam insulation?- Spray foam insulation does not always fill every possible cavity. …
- Spray foam insulation might encourage water damage for some homeowners. …
- Spray foam insulation can sometimes shrink. …
- Spray foam insulation requires a lot of experience to get it right.
How much does it cost to insulate a 2000 square foot house?
The average cost to insulate a 2,000 square foot home nationally is $2,700-$3,300 for the total project, including labor, materials, and installation. For a Do-It-Yourself project, the average cost is $700-$1300 for the total project.
How do I estimate the cost of insulation?
The average cost per square foot is between $0.30 to $1.50. So, for a 500-square-foot area, your estimate will vary between $150 to $700 if you do it yourself. 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.
How many square feet does a 55 gallon drum of spray foam do?
½# Open Cell Spray Foam 55 gallon kits: 16,000-21,000 board feet coverage We also have Open Cell Spray foam insulation for your project. Open cell is great for sound, and you will get your air barrier at 3.5” thickness.
How long does spray foam last?
With proper application, Spray Foam will last the lifetime of your home. Even roofing applications will last upwards of 30 years, with proper long-term maintenance. Spray Foam insulation adheres extremely well to virtually all substrates, and maintains its rigidity once dry.
How much does it cost to insulate a 40x60 shop?
Most of the time, you should expect to pay somewhere in the ballpark of $0.50 to $1.25 per square foot to have metal building insulation installed at the time of your building’s erection. So, to have insulation installed in your 40’x60′ metal building, you can expect to pay between about $1,200 and $3,000 for labor.
Is 3 inches of spray foam enough?
Now generically speaking, we usually recommend open cell spray foam to be 6- to 10-inches on a roof deck or ceiling and 3-inches in the walls. … After you reach a certain threshold, like the amount required to create an air seal, you don’t see anymore return on investment by adding the extra foam.
What is the purple spray foam insulation?
WALLTITE® (PU) : The purple insulation. … The purple, closed-cell foam is simply sprayed on, cures almost instantly and creates a seamless, airtight insulation for walls, floors and internal roofs.
What is the R-value of 3.5 inches of spray foam?
Open-cell spray foam absorbs and holds water. It has a lower R-value per inch than closed-cell foam and is vapor-permeable. The R-value is R-3.5 to R-3.6 per inch, so filling a 2×4 cavity yields about an R-13.
How much would it cost to spray foam my attic?
The total projected average cost to spray foam an attic in an existing home ranges between $5,000 to $10,000.
Will insulating my attic make my house cooler?
The first way insulating material cools a home is by not letting it get too hot in the first place. … However, insulating the attic also prevents cool air from escaping because it reduces the movement of air, also called convection. Overall, the average home can save 10 percent on cooling by insulating the attic.
Can mold grow on spray foam insulation?
Adding spray foam insulation in potential problem areas is a great way to insulate your home and goes a long way towards mold prevention. It is mold-resistant because it expands when it gets wet, meaning there’s no room for mold or mildew!
What is the R-value of 4 inches of spray foam?
Typical installations are limited to a total thickness of 4 inches.” Since Comfort Foam 158 has an R-value of 6.2 per inch, the max- imum thickness of 4 inches yields an R-value of about 24.8.
How long does it take for spray foam insulation to pay for itself?
With spray foam insulation included into a new home build, homeowners are able to pay back the initial investment within three to four years on average*.
What is board feet for spray foam?
A board foot is a square foot of spray foam insulation at a thickness of one inch. As the industry standard measurement it includes the square footage of the surface that will be sprayed as well as home many inches thick the foam should be.
What is 200 board feet in square feet?
A 600 board foot kit will cover 600 square feet at 1 inch thickness or 300 square feet at 2 inches thick; a 200 board foot kit will cover 200 square feet at 1 inch thickness, and so on.
What is the best R value for walls?
Typical recommendations for exterior walls are R-13 to R-23, while R-30, R-38 and R-49 are common for ceilings and attic spaces.
Why is spray foam bad?
According to the US EPA, the dangers of spray foam insulation include exposure to harmful chemicals, lung and eye irritation, shortness of breath, sore throat, and fever. However, you can avoid these adverse effects by using protective equipment when installing spray foam insulation.
Does spray foam insulation break down over time?
Another good thing about spray foam insulation is the fact that it also does not break down as easily as fiberglass insulation, thus giving it a much longer lifespan.
How long will foam insulation last?
The International Association of Certified Home Inspectors states that spray foam insulation, wrap tape and housewrap insulation can last for more than 80 years. At the same time, cellulose, loose-fill, foamboard, loose fill and rock wool insulation can last up to 100 years.
Can you put new insulation over old?
According to ENERGY STAR®, you can put new insulation over old insulation, “unless it is wet. … The vapor retarder on top of or between layers of insulation can trap moisture. Any existing batt or roll insulation in the attic should have the facing against the attic drywall floor or no facing at all.
How much does it cost to insulate a 1800 sq ft attic?
The average cost to insulate an attic is between $1 and $7 per square foot. This equates to a typical price range of up to $1,500 per project including labor and materials. For attics with smaller square footage, costs can be as low as $500 while insulation for larger attics can cost up to $4,000.
