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Foam Roofing Installation Cost

Foam Roofing Installation Cost

National average
$8,000 - $9,000
(foam roof with two layers of silicone underlayment for 1,500 sq. ft. house)
Low: $4,800 - $6,000

(single silicone underlayment for 1,200 sq. ft. house)

High: $10,000 - $12,000

(two layers of silicone underlayment, UV layer in roof with inherent architectural obstructions)

Cost to have foam roofing installed varies greatly by region (and even by zip code).
Get free estimates from roofers in your city.

The average cost to have foam roof installed is $8,000 - $9,000.

In this guide

Pros and cons
Silicone coating
Energy efficiency
Spray foam vs. modified bitumen
Enhancement and improvement costs
Additional considerations and costs

How much does it cost to have foam roofing installed?

Spray foam roofing is an eco-friendly approach to roofing that can actually lower energy bills. Spray foam roofing is durable and lightweight, which puts less wear, tear, and stress on your home overall. Spray foam roofs are also resistant to water damage and prevent standing water, which is an issue with other roofing types and can require costly repairs.

The cost of installing a foam roof depends on the style and size of the house, but typically averages $4-$5 per square foot plus the cost of materials, for a total of around $8,000 - $9,000 for a 1,200 square foot home.

Spray foam roofing costs

Spray foam roofing installation costs
National average cost$8,500
Average range$8,000-$9,000
Minimum cost$4,800
Maximum cost$12,000

Cost factors

Spray foam roofs can fluctuate in price due to a number of cost factors. Depending on the size of your property and the obstacles that arise, prices can vary:

  • The necessary materials and equipment for a spray foam roof average $2 per square foot, meaning it will cost $2,400 in materials for a 1,200 square foot home. The larger the roof’s surface area, the more costly the installation of the roof.
  • The thickness of the spray foam and the number of layers applied also play a factor in the cost. If you add additional silicone layers to the roof, you will pay more.
  • Since this must be installed very precisely, access to your roof is key. If contractors must deal with vegetation, foliage, or have other difficulties when accessing the roof it will delay them, which may increase your labor costs.
  • Additionally, homeowners should know that roofs with lots of architectural details or obstructions, such as skylights, pipes, and chimneys, may require more time to spray the roof, which will increase the overall cost based on the increased time spent in labor.


The roofing contractor will first need to prepare the surface for the spray foam material by getting rid of all dust, debris, and dirt. Spray foam roofs can only be installed on sunny, dry days, so this will also dictate the schedule of the project. Any oils, grime, or contaminants on the roofing surface can affect how the foam adheres.

If you want to prevent future water damage, you may choose to go with a thin layer called an underlayment 1, which is a waterproof membrane, which costs around $6 per square foot, installed.

Pros and cons

Spray foam roofing systems have many advantages, such as being more energy-efficient than conventional asphalt 2 or metal panel roofs and creating less of a carbon footprint. However, we should also take into account some drawbacks when installing a spray foam roof on your home or property.


Can be used in any climate

Lasts over 50 years




Thermal insulation


Easy to install and maintain

Causes minimal disruption for homeowner

Requires professional installation

Precision is imperative during installation

Fumes may be toxic

More expensive than other roofing options

Must be installed in dry, warm weather

Contact with foam could cause sensitivity or allergy


When it comes to spray foam products, there are basically two types: open-cell and closed-cell foam. The following information will help you decide between the two options.

  • Open-cell foam. Open-cell foam systems can allow moisture to get through, and that’s why they do require a vapor retarder, which increases the overall cost of your spray foam roofing project. Open-cell spray foam is softer and flexible, resembling a sponge once applied. It is about half the cost of closed cell spray foam, at around $0.50 per linear foot, plus installation costs. Open-cell foam is less commonly used in roofing, as it can become damaged and spongy over time, and is more often found in spray insulation applications. Open-cell foam is more vulnerable to moisture, but it is a cheap, albeit temporary, roofing solution. It works well in tight spaces as it has more expansion capability. It is lightweight and blocks out sound well.
  • Closed-cell foam. Closed-cell spray foam is denser, weighs around 2 pounds per cubic foot, and is more tightly pressed together, which prevents air and moisture from penetrating it. It offers water resistance, which also helps curb the growth of mold. It has a built-in 3 vapor retarder and is used in both roofing and insulation applications. Basically, closed-cell foam is more resilient in the face of water and thus costs more to install. It is strong and more commonly used in roofing than insulation. It costs around $1.00 per linear foot plus installation, but more is sustainable and results in greater cost-savings over time than other roofing options.

Silicone coating

A silicone coating is applied after the spray foam help to make the foam more resistant to the elements, especially water, and the initial coat is usually included in the price. Typically, contractors charge another 10%-15% of the overall cost for each additional coat of silicone. This extra silicone topcoat is usually embedded with granules for more protection, which is included in the cost. The texture helps prevent damage caused by the elements and environment, like birds, prolonging the life of your roof.

This silicone coating also helps improve the efficiency of your roof by reflecting the sun and insulating the home, contributing to lower overall utility costs and energy savings. Two silicone coats–the initial included plus an additional coat–are typically recommended, though it really depends on the climate and environment where you live.


Spray foam roofs are applied using a spray process that involves a chemical reaction that expands the sprayed material to 20-times its initial size. The necessary materials and equipment average $2 per square foot, meaning it will cost $2,400 in materials for a 1,200 square foot home. As for the cost of labor, most roofers will charge $2-$3 per square foot, so a 1,200 square foot home would run $2,400-$3,600 for labor, plus the cost of materials.

Consider the process to install spray foam roofing to be similar to an insulation project in how the foam is sprayed onto the surface as a liquid which later hardens into a solid around 20-times its original size. Because foam roofing comes from a chemical reaction and requires special equipment, it is recommended to always hire a professional instead of doing the work yourself. A basic foam roof takes a day or two to spray, depending on the pitch, slope, and size of the surface.

The materials are not cheap so it can be costly when errors occur. Also, there are some specialized tools involved in spraying foam roofing that most lay-men won’t have on hand. Generally, roofing contractors will charge $2-$3 per square foot, rather than an hourly rate. Know that spray foam roofing requires precision and care to do properly.


You will save money on roofing repairs and maintenance with a spray foam roofing system, as these are very durable and easy-to-care-for roofs. To make small foam repairs, like for cracks, you may purchase a repair kit for $150-$500.

Some preventative maintenance includes routine cleaning of your roof and gutters to preserve them from the elements. Pressure washing works well with spray foam roofing and contractors typically charge $360 to wash a 1,200 square foot home, and $150 to clean the gutters.

Plan to apply a new silicone restoration coating every 10 years or so. On average, foam roof recoating costs about $1.30 per square foot, or a little more than one-fourth of the total cost of your original foam roofing system project and installation. The average cost of a new foam roof coating is about $8,250. Costs range from $3,500-$13,000 depending on many different factors.

Energy efficiency

A spray foam roofing system provides insulation, which helps the energy efficiency of the home. These roofs keep the hot air out in warmer months and warm air in during winter. Furthermore, spray foam makes your home less vulnerable to leaks, moisture, and rain which could breech other types of roof systems. The spray foam is naturally waterproof and very lightweight, too.

Spray foam vs. modified bitumen

Asphalt is another popular roofing choice, primarily due to its low cost. Compare for yourself the pros and cons of spray foam roofing systems versus this common roofing type.

Roof TypeProsCons
Spray Foam Roofing




Lasts more than 50 years

Easy to maintain


SPF roofs can also be applied over your existing roof

Saves 30-50% of energy operating costs per year

More expensive

Not good for DIY

Less Common, less widely available

Unprotected spray foam insulation can be a fire hazard

Must be installed in dry, sunny weather

Inhalation of fumes can cause health issues

Modified Bitumen 2 (asphalt)


Lasts more than 10 years

Widely available

Prone to damage

Not waterproof

Heavy and bulky

Not eco-friendly; creates non-recyclable waste

Enhancement and improvement costs

Silicone topcoat

You also have the option of adding an extra Silicone topcoat with granules for more protection. The texture helps prevent damage caused by the elements and environment, like birds; it only costs an additional 10%-15%, approximately, of your overall roofing costs.

UV protection

If you live in an area with lots of sun and want to block more UV rays, you can add a special protective layer to the roof, but it will increase your overall costs by around a third.


Consider spending a bit more for added waterproofing with an underlayment. An underlayment is a membrane that helps prevent moisture from leeching in through your foam roof. An underlayment costs around $6 per square foot at the time of roofing installation.

Extra foam layer

Foam roofs naturally lower energy costs because they are lightweight and white, so they naturally reflect heat. You can potentially lower your energy bill even more by adding an extra layer of foam to make the roof thicker and more reflective. Adding an extra layer costs $0.50-$1.00 per square foot.

Roof sealant

A great option for preventing future leaks is to apply roof sealant. This typically costs $850-$1,000 for a standard roof.

Additional considerations and costs

  • Chemical fumes. Talk to your contractor about whether you can be in the home when they are spraying your roof; it is possible that you may need to leave the house to avoid inhaling chemical fumes.
  • Permits. Typically, you will need a permit to build or replace a roof of any kind. If you are only making small repairs on less than 100 square feet, you don’t usually need a permit, though requirements and laws vary for each geographic locale. You should expect to obtain permission and approval from your homeowners’ association before you install your new roof, if applicable.
  • Remove old roofing. The cost of removing existing roofing materials can add to the cost of installing your spray foam roof, though many contractors will add this in with their estimate and installation quote.
  • DIY. DIY is possible, but can be quite messy. There are kits that you can purchase for an average cost of $1,000-$3,000 for a basic 1,200 square foot roof.
  • Architectural details. Roofs with lots of architectural details or obstructions, such as skylights, pipes, and chimneys, may require more time to spray, which will increase the overall cost based on the number of extra hours.


  • How long does a foam roof last?

One of the most compelling characteristics of a spray foam roof is its durability. Spray foam roofing lasts over 50 years with routine maintenance.

  • Can you walk on a foam roof?

Yes, you can walk on a foam roof. Foam roofing is very resilient to weight and traffic, but be careful: the surface tends to be slick when wet.

  • How much does polyurethane foam cost?

Sprayed polyurethane foam is comprised of isocyanate and polyol, which is then fed through a spray gun and mixed. It costs around $2 per square foot for the foam, around $2,400 for 1,200-square feet, plus labor costs of applying it to the roof surface.

  • How much does spray foam roofing cost?

The cost of installing a foam roof depends on the style and size of the house, typically around $8,000-$9,000 for an average 1,200 square foot home, which includes both labor and materials.

  • What is spray polyurethane foam roofing?

Sprayed polyurethane foam is a combination of isocyanate and polyol, which is sprayed as a liquid onto a surface and then hardens into a solid, durable roof. It is resilient and easy to care for.

  • Will open-cell spray foam insulation really rot your roof?

No, spray foam will not rot your roof; however, if it is not installed properly, you could allow moisture in, which will rot a roof. When water permeates the foam, it will degrade it over time. Correct installation is key.

  • How much does it cost to re-roof a 1,500 sq.ft. house?

The cost of installing a foam roof depends on the style and size of the house, but typically averages $4-$5 per square foot, for a total of $6,000-$7,500 for a 1,500 square foot home. A spray foam roofing installation can be applied over an existing roof, but it does require a clean surface for proper application. It must be dry and free of contaminants like grease or oil.

  • How much does it cost to install a PVC roof?

Again, the precise cost of PVC roofing will vary based on your location, materials, and other considerations. Generally, PVC roofing costs $4-$7 per square foot installed, but could be as much as $8-$12 or more per square foot.

  • How much does it cost to recoat a foam roof?

On average, recoating a foam roof costs about $1.30 per square foot, or a little more than one-fourth of the total cost of your foam roofing system project and installation. The total cost of recoating a foam roof averages $8,250. Costs range from $3,500 to $13,000 depending on many different factors.

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Remodeling Terms Cheat Sheet

Definitions in laymen's terms, cost considerations, pictures and things you need to know.
See full cheat sheet.
1 Underlayment: Roofing material laid underneath roofing tiles to seal the roof, preventing leaks
glossary term picture Bitumen 2 Asphalt: (Also known as Bitumen) A viscous, black mixture of hydrocarbons often used for roofing and waterproofing. It is also used in asphalt for paving roads
glossary term picture Built-in 3 Built-in: An item of furniture, such as a bookcase or set of cabinets, that is built directly into the structure of the room. Built-ins are therefore customized to the room and not detachable

Cost to have foam roofing installed varies greatly by region (and even by zip code). To get free estimates from local contractors, please indicate yours.

Professional spraying foam on a roof

Labor cost by city and zip code

Compared to national average
Anderson, SC
Arlington, TX
Athens, GA
Atlanta, GA
Aurora, CO
Baltimore, MD
Birmingham, AL
Boca Raton, FL
Brooklyn, NY
Buffalo, NY
Chicago, IL
Chilhowie, VA
Columbia, SC
Cookeville, TN
Decatur, GA
Detroit, MI
Dyersburg, TN
Fort Lauderdale, FL
Fort Wayne, IN
Fort Worth, TX
Garden Grove, CA
Gilbert, AZ
Hemet, CA
Henderson, NV
Hollywood, FL
Houston, TX
Knoxville, TN
Lancaster, CA
Las Vegas, NV
Los Angeles, CA
Lynchburg, OH
Macon, GA
Massillon, OH
Melbourne, FL
Memphis, TN
Mims, FL
Minneapolis, MN
Mobile, AL
Moreno Valley, CA
Naples, FL
Oakland, CA
Ocala, FL
Orlando, FL
Pensacola, FL
Philadelphia, PA
Phoenix, AZ
Pittsburgh, PA
Pomona, CA
Pompano Beach, FL
Port Saint Lucie, FL
Labor cost in your zip code
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