Spray Foam Roofing Cost | Cost to Install Foam Roof (2023)

The typical cost to spray foam roof runs between $4 and $7 per square foot with basic material and labor included. As the square footage increases, more materials and more workers are needed to cover the whole surface, ultimately adding to the cost. Below is a table with the average cost homeowners would pay to have the most common roof sizes covered with roof foam.

Spray Foam Roofing Cost | Cost to Install Foam Roof (1)

Spray Foam Roofing Cost | Cost to Install Foam Roof (2)

Square FeetAverage Cost (Materials and Labor)
1,200 sq.ft.$4,800-$8,400
1,500 sq.ft.$6,000-$10,500
2,000 sq.ft.$8,000-$14,000
2,500 sq.ft.$10,000-$17,500
3,000 sq.ft.$12,000-$21,000
3,500 sq.ft.$14,000-$24,500

Compare prices from spray foam roofing contractors near me

Spray Foam Roofing Cost by Foam Density

In most cases, a standard SPF roof with a standard layer of foam is between $0.30 to $1.50 per square foot. The thickness of the sprayed foam depends on where you live, and the outside conditions in your area. For instance, if you live in an area with harsh weather (high heat, heavy rainfall/snowfall), the roof needs to provide a higher level of insulation, requiring a spray foam with a thicker density.

The thickness of spray foam depends on the desired R-value, an indicator used to measure a roof’s insulation. There are three levels of foam density: low-density, medium-density, and high-density spray foam. The denser the foam, the higher the insulation of the building, and with it, the R-value. For instance, high-density spray foam has an R-value of 6.6 (or higher) per square inch, which means that if you want to achieve an R-25 value of insulation, you need to have a 4-inch layer of spray foam (25/6.6=4).

Spray Foam Roofing Cost | Cost to Install Foam Roof (3)

Spray Foam Roofing Cost | Cost to Install Foam Roof (4)

Foam TypeCost per Sq.Ft. (Material only)

Low-Density Spray Foam

Low-density spray foam is the cheapest option among the three, costing around $0.30 to $0.65 per square foot. Typically, it comes with a lower density ranging between 0.4 to 1.4 pounds per cubic foot and an R-value lower than 3.6 per inch. While it’s not as effective for insulation as medium and higher density spray foam, it’s perfect for installing in areas with mild weather as it’s the cheapest option.

Medium-Density Spray Foam

Medium-density spray foam is also known as closed-cell foam with an R-value of 5.5 to 6.6 per inch. The cost can range between $0.90 to $1.20 per square foot. It can be applied as low-pressure or high-pressure two-component spray foam depending on how it’s applied - whether it’s on a smaller area or a larger one. It provides the best balance between cost and insulation, making it ideal for those wanting to get a satisfactory level of insulation and waterproofing while staying on a budget

High-Density Spray Foam Cost

High-density spray foam roofs usually come at the cost of $1-$1.50 per square foot. As its name suggests, high-density spray foam has the densest structure out of all insulation types. It provides an R-value greater than 6.6 per inch. Similar to medium-density, it comes in the form of a closed-cell type, provides a higher level of insulation, and offers the best waterproof mechanism out of the three.

(Video) How Much Does a Spray Foam Roof Cost?

SPF Roofing Cost by Cell Type

Spray foam usually comes in two types: open-cell and closed-cell. One is better than the other indifferent situation and settings, so there is no definite winner in the open-cell vsclosed-cell foam comparison. Both types come with a different level of energy efficiency and density that impacts the cost and provide a different level of insulation at the same time.

As their name suggests, open-cell foam is made of cells that aren’t fully encapsulated, making them softer and more flexible. On the other hand, closed-cell foam is made of completely closed cells, making them more rigid and stable.

Spray Foam Roofing Cost | Cost to Install Foam Roof (5)

Spray Foam Roofing Cost | Cost to Install Foam Roof (6)

TypeCost per Board Ft. (Material Only)
Open-Cell Foam$0.30-$0.65
Closed-Cell Foam$0.90-$1.50

Open-Cell Spray Foam Cost

The typical cost of open-cell ranges between $0.30 to $0.65 per board foot plus installation. Open-cell systems can allow moisture to get through, and that’s why they require a vapor retarder, which increases the overall cost of your spray foam roofing project. On the other hand, open-cell spray foam is softer and flexible, resembling a sponge once applied. Due to the weaker durability, it’s not as used in roofing as other types but is more often found in spray insulation applications.

The R-value of open-cell SPF is 3.7 to 4 per inch, but it is a cheaper roofing solution that works well in tight spaces as it has more expansion capability. It’s also lightweight and blocks out sound well.

Closed-Cell Spray Foam Roof Cost

Closed-cell spray foam roof costs between $0.90 and $1.50 per board foot plus installation. It’s denser, weighs around 2 pounds per cubic foot, and is more tightly pressed together, preventing air and moisture from penetrating it. The typical R-value of open-cell Sprayed Polyurethane Foam is 4.9 to 7.1 per inch, which also provides water resistance and helps curb the mold growth.

Closed-cell SPF has a built-in 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. While it’s a more expensive version, it’s sustainable and results in greater cost-savings over time than other roofing options.

Foam Roof Coating Cost

The cost to add protective silicon or acrylic roof coat is between $1.90 and $3.50 per square foot in labor and materials. Adding a coat of elastomeric membranes gives it an additional layer of UV protection. The coating improves the waterproof properties of an SPF roof, makes it more impact-resistant, and increases its fire rating. Depending on where you live, your roof may require one or two layers of coating. Two types of coating are available: silicone and acrylic, each with a different cost and fit for various settings.

Roof Acrylic Coating

Acrylic polymers are roof coatings designed specifically for roof applications and are one of the cheapest coating materials at $0.15 to $0.75 per square foot for the material only. It’s made of a fully adhered elastomeric membrane five to ten times thicker than house paint. This means that they aren’t mechanically attached but rather sprayed on the roof as a liquid, which forms a solid membrane as it dries. It’s widely used because it is durable and easy to use. Additionally, because of the compounds in it, acrylic coatings have minimal toxicity. Some contractors will first apply an acrylic coating and then upgrade it to a silicone coat. Others may mix the two types to maximize energy efficiency and minimize costs.

Silicone Roof Coating Price

A silicone coating costs between $1.40 and $2.50 per square foot for the material only. It is applied to make the foam more resistant to the elements, especially water. The initial coat is usually included in the price. Typically, contractors charge an additional 10%-15% of the overall cost for each added coat of silicone, which is around $0.14 to $0.38 per square foot. The extra silicone coat is usually embedded with granules for more protection, 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 improves 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; however, it depends on the climate and environment where you live.

Spray Foam Roofing Installation

Spray foam roofs are applied using a spray process involving a chemical reaction that expands the sprayed material to 20 times its initial size. The basic necessary materials and equipment average $2 to $3 per square foot, meaning it will cost between $3,000 to $4,500 in materials for a 1,500 square foot home. As for labor cost, most roofers charge $2 to $4 per square foot, so a 1,500 square foot home would run $3,000 to $6,000 for labor. If you want to install an additional layer of spray foam and reinforce it with a silicone coat and a sealant, it would add around $1.35 to $2.35 per square foot, totaling between $8,000 and $14,000 for a 1,500 square foot roof.

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 to be effective. This requirement will dictate the project’s schedule. Any oils, grime, or contaminants on the roofing surface affect how the foam adheres. If you want to prevent future water and moisture damage, you may choose to go with a thin layer called an underlayment. It’s a waterproof membrane that costs around $3 to $6 per square foot, installed.

(Video) Cost of Spray Polyurethane Foam Roofing

The process of installing spray foam roofing is similar to an insulation project. 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 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.

Generally, roofing contractors will charge $2 to $4 per square foot, rather than an hourly rate, as the length of their work depends on the size of the roof. Prices vary because materials are expensive, so errors can be costly. Also, some specialized tools are involved in spraying foam roofing that most people won’t have on hand.

Foam Roof Replacement

Replacing a foam roof costs around $4.50 per square foot, instead of roofing-over, which costs between $2 and $3 per square foot. Typically, spray foam roofs last around 10 to 20 years before needing any repairs or replacements. They can last over 50 years with proper care. To ensure your roof lasts and protects your home properly, you need to have it regularly inspected by a professional. Often, the cracks and flaws you notice can be repaired, but some signs indicate it needs to be replaced soon. One of those signs is spots with leaks and mold on your upper walls. If you notice these, it means that the quality of your roof is deteriorating and needs to be either repaired or replaced.

Spray Foam Roofing Pros and Cons

More and more homeowners opt to have a foam roof installed because of the value they receive at an affordable price. For one, it provides eco-friendly insulation, making it great for both cold and warm climates. Additionally, installing and maintaining a spray foam roof is pretty straightforward and provides a lightweight, seamless, waterproof cover that protects the home efficiently in all types of weather.

The installation requires dry, warm weather, which may dictate the schedule and time it takes to install an SPF roof. The chemicals used in the production have been proven to be toxic, although most manufacturers claim that these disappear once the foam is installed. These chemicals may cause sensitivity or allergic reactions to people prone to reactions from chemicals.

Spray Foam Roofing Cost | Cost to Install Foam Roof (7)


Spray Foam Roof Maintenance

To make small foam repairs, like cracks and tears, you may purchase a repair kit for $200 to $750 from a local supplier. You will save money on roofing repairs and maintenance with a spray foam roofing system, as these roofs are easy to care for and very durable. However, these must be maintained and repaired to ensure they last for the predicted lifespan of 10 to 20 years.

Some preventative maintenance includes regular roof cleaning, which costs $0.10 to $0.75 per square foot, depending on the cleaning method you choose. Routine cleaning of your roof and gutters preserves them from the elements and cleans any debris, leaves, or branches that may have fallen on it. This ensures that it will continue to provide long-lasting protection and insulation.

(Video) What is the Process, Warranty and Cost of Spray Foam Roofing?

Plan to apply a new silicone restoration coating every ten years or so, which costs about $1.30 per square foot. This means that to replace a 1,500 square foot roof, you would pay around $1,950 plus installation costs. In general, you can expect to pay a little more than one-fourth of the total cost of your original foam roofing system project and installation.

Foam Roof vs Shingles

The average cost to install roof shingles varies greatly depending on the type of shingles you will use. The cost can be between $1 per square foot for 3-tab shingles and $50 per square foot for bitumen shingles (material only). However, most homeowners pay around $3.50 to $5.50 per square foot with labor included, so you can expect to pay between $5,250 and $8,250 to install roof shingles on a 1,500 square foot roof.

The complexity of the roof, the shingle material, the style of roof you choose, and the additional work needed impact the overall cost. Roof shingles are installed over a felt underlayment and a plywood roof deck by overlapping the layers on the roof. While they can be very expensive, the average cost of having roof shingles installed is lower than spray foaming, 3.50 to $5.50 per square foot compared to $4 to $7 per square foot for spray foam roofs. In addition to this, the durability of roof shingles is sometimes three times greater than the foam roof, ranging between 20 to 60 years, depending on the type of shingles you install.

Spray foam is commonly used for flat roofs, while roof shingles are more fit for low- to medium-pitched roofs. This is because flat roofs are more prone to standing water and leaks, against which spray foam is far more effective than shingles. Roof shingles can also be installed on high-pitched roofs, but this makes installation, repairs, and maintenance a bit challenging.

Spray Foam Roofing Cost | Cost to Install Foam Roof (8)

Spray Foam Roofing Cost | Cost to Install Foam Roof (9)

TypeCost per Sq.Ft. (Materials and Labor)
Foam Roof


Roof Shingles$3.50-$5.50

Foam Roof Cost Factors

A spray foam roof costs $2 to $4 per square foot on average, meaning it will cost $2,400 to $4,800 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 exact costs fluctuate due to many factors, such as the size of your property and the obstacles that arise. Another important factor is the necessary materials and equipment the roofers use. You can also opt for additional silicone or acrylic roof layers, which will add to the overall cost.

As we mentioned above, spray foam roofs must be installed very precisely, so easy 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 and increase labor costs. Additionally, roofs with lots of architectural details or obstructions, such as skylights, pipes, and chimneys, may require more time to spray the roof, increasing the overall cost based on the increased labor time.

Enhancement and Improvement Costs

UV Roof Protection

If you live in an area with lots of sun, your spray foam roof will require an additional layer of protection. To ensure it will last longer, you want to block more UV rays by adding a special protective layer to the roof. These coatings are added on top of the standard roof coating and increase your overall costs by around a third, translating to around $1.90 to $3.50 per square foot in labor and materials.

Roof Underlayment Cost

You can opt to install an underlayment under the roof for a cost of around $3 to $6 per square foot with installation costs. Roofing underlayment is applied under all roof materials directly on the roof deck before installing the spray foam. It’s a membrane that adds an additional layer of protection and helps prevent moisture from leaching in through your foam roof. The main materials used for underlayment are asphalt-saturated felt, non-bitumen synthetic, and rubberized asphalt.

(Video) Is Your Spray Foam Roof ACTUALLY Cost-Effective?? [Whiteboard Roofing]

Extra Foam Layer

Adding an extra layer of foam costs around $0.50 to $1.50 per square foot. Foam roofs naturally lower energy costs because they are lightweight and white, reflecting the heat naturally. You can potentially lower your energy bill even more by adding an extra layer of foam to make the roof thicker and more reflective.

Foam Roof Sealant

A great option for preventing future leaks is to apply roof sealant, which typically costs around $100 for 5 gallons plus an additional $0.45 to $2.50 per square foot to have it installed by a professional. Roof sealants repair small cracks, punctures, or gouges on the roof and prevent water or moisture from accumulating. However, areas with bigger damage may require repair or roof replacement. When you apply a sealant, it will absorb damage from the sun, snow, ice, and water instead of your roof. It provides an additional layer of protection. Keep in mind that the sealant you use has to be compatible with your spray foam roofing system.

Additional Considerations and Costs

  • Chemical fumes. Keep in mind that during installation and while it’s drying, spray foam may release chemical fumes. Talk to your contractor about whether you can be in the home when they are spraying your roof. You may need to leave the house to avoid inhaling chemical fumes. You should also avoid being present in the home if you’re allergic or sensitive to the chemicals used in spray foam.
  • 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 installing your new roof, if applicable.
  • Old Roof Removal. Having the old material removed from your roof typically adds $0.50 to $1.00 per square foot to the overall cost. Removing the old material is required to do some repairs, while other times, it’s needed to maintain the roof in an optimal state. Many contractors add this in with their estimate and installation quote, but you can ask for a separate quote for the removal job only.
  • DIY. If you opt to do it yourself, there are kits that you can purchase for an average cost of $900 to $3,000 for a basic 1,200 square foot roof. While installing spray foam roofing can be a DIY job, it can become quite messy. Roof jobs are quite risky, so any mistake can result in injuries or thousands of dollars in roof damage. On the other hand, licensed contractors have the right equipment and knowledge to spray foam roofs, so it’s always recommended to hire a professional to do the job.
  • Roof Style. You can select from many different architectural roof styles. Some styles have many architectural details or obstructions, such as skylights, pipes, and chimneys. All these may require more time to spray, which will increase the overall cost based on the number of extra hours that will be spent.
  • Insulation. Spray foam roofing systems provide insulation by keeping the hot air out in warmer months and holding in the warm air during winter. In addition to this, the spray foam is waterproof, which makes your home less vulnerable to leaks, moisture, and rain, which could breach other types of roof systems.
  • Certification. Consider getting a LeakFREE® Roof Certification for your spray foam roof. It's the highest roof certification given by the National Roof Certification and Inspection Association. It is a federally trademarked document that guarantees that your roof will remain LeakFREE® for up to five years, or a member of NRCIA will repair it. The certified inspector from NRCIA will examine and analyze the interior, exterior, perimeter, attic, and rooftop to ensure it meets the highest safety standards before issuing the Certification.


  • How long does a foam roof last?

One of the most compelling characteristics of a spray foam roof is its durability. These roofs last between 10 and 20 years, although, with the proper maintenance, they can last over 50 years.

  • Can you walk on a foam roof?

Yes, you can walk on a foam roof. Foam roofing is very durable and can support heavier weight and traffic than some other roofing types. However, the surface tends to be slick when wet, so be careful not to slip while walking on it.

  • How much does polyurethane foam cost?

Sprayed polyurethane foam costs around $2 to $3 per square foot for the foam only, around $2,400 to $3,600 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 is $8,000 to $14,000 for an average 1,500 square foot home, including a two-layered spray foam roof installed with a medium-density foam and reinforced with a silicone or acrylic coat and an additional sealant layer.

  • What is spray polyurethane foam roofing?

Sprayed polyurethane foam is a combination of isocyanate and polyol. The chemicals used are pumped from separate containers and mixed on the job site, after which they are sprayed onto the roof surface. Once sprayed, the foam expands and hardens into a solid, durable roof that is easy to care for and resilient.

  • 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 then rot a roof. When water permeates the foam, it will degrade over time. Correct installation is key.

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

The precise cost of PVC roofing varies based on your location, materials, and other considerations. Generally, PVC roofing costs $3 to $7 per square foot installed but could be as much as $8 to $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.

  • Can you put solar panels on a foam roof?

Solar panels can be installed on any roof as long as there is enough sunlight reaching the area.

(Video) Lyons Roofing: Polyurethane Foam Roof installation


Will mortgage lenders accept spray foam insulation? ›

One equity release specialist told inews in January 2022 that some mortgage lenders may accept a house with spray foam insulation. However, they would need a valuer's approval and certain criteria about the type of spray foam would need to be met.

Will expanding foam stop a leaking roof? ›

This thermal resistance keeps cold air and water out: leaving the property within a comfortable temperature and, most importantly, completely dry. LogicFoam spray foam insulation will stop water leaks in their tracks!

Is it a good idea to spray foam your roof? ›

Spray foam insulation is one the most effective ways to insulate your home – it has a higher effective rate of insulation than other options like fibreglass and organic insulation. Because of how effective spray foam insulation is at keeping heat in (and energy bills down), we would always recommend considering it.

What is the cheapest way to insulate a roof? ›

Glass wool is one of the most common insulation materials for roofs. It is lightweight, has a good insulation value and is quite cheap as well. Glass wool insulation is only possible if there is a roofing underlay. Moreover, the inside should always be finished with a vapour barrier.

What are the negatives of spray foam? ›

On the downside, spray foam insulation comes at a price that is considerably more expensive than fiberglass. Often times, spray foam is triple the price of fiberglass and sometimes it can be more. Applying spray foam insulation is also something that is not advised to do by yourself unless it is a very small job.

Can bugs get through spray foam insulation? ›

Furthermore, while pests can damage or even eat other types of insulation such as fiberglass or cellulose insulation, closed-cell spray foam insulation hardens into a strong barrier that most pests cannot break through.

Does spray foam cause roof rot? ›

Studies show that open-cell spray foam is risky in colder climates. Indoor moisture diffuses through the foam and comes in contact with the cold roof sheathing. The spray foam traps the moisture against the roof, which results in eventual decay.

How long does spray foam roofing last? ›

The average life-span of a spray foam roof is 15 to 20 years. BUT, we've personally walked on spray foam roofs that are 55+ years old. Unlike other flat roofing materials, SPF roofs can be infinitely renewed. This is certainly one of the many advantages of a foam roof.

What happens if roof leaks with spray foam insulation? ›

A hole in a spray foam roof won't cause a leak because spray polyurethane foam is a closed-cell, meaning if there's a hole, the liquid will only sit inside the hole and won't travel anywhere else.

Why do mortgage companies dislike foam insulation? ›

The hardened foam can also warp wooden beams. This has led to many mortgage and equity release firms refusing to lend to homes with this type of loft insulation.

Does a spray foam roof need to be vented? ›

After installing spray foam insulation in your attic, you'll need both passive and active ventilation. Some good passive ventilation options for your attic include roof edge and peak vents. For active ventilation, consider an attic fan.

How thick should a foam roof be? ›

A: Dura-Foam roofs are a minimum of 1″ thick on most commercial and residential roofs. Standard thickness over occupied areas on residential roofs usually is a minimum of 1.5″. Thickness may be greater to meet insulation or drainage requirements.

Should the underside of a roof be insulated? ›

You'll also want to insulate the exterior walls and the underside of the attic's roof. Otherwise, space will suck up a tremendous amount of heating and cooling energy throughout the year, because all of that energy goes right up and out of the roof.

Is it better to insulate the roof from inside or outside? ›

Flat roofs are best to insulate on the outside of the roof, which prevents heat loss and reduces energy consumption. By applying insulating material on top of the roof structure, you avoid the risk of moisture damage in the wooden structure. With interior insulation, this risk is greater for flat roofs.

Can you over insulate your roof? ›

The answer is yes! Past a certain point, insulation in a vented attic will do more harm than good. In most of the United States, achieving an R-Value of 38 is more than sufficient. In the temperate Southern California region, an R-Value of 30 tends to be ideal.

Can spray foam get moldy? ›

As a product, spray foam insulation does not attract mold. And unlike wood or metal, spray foam does not rot, rust or deteriorate. This means that an area properly sprayed with foam insulation will never become a food source or a hospitable environment for a mold colony.

Can spray foam cause a fire? ›

Let's cut to the chase. Yes, spray foam — like all foam plastic materials — is flammable. However (and here is where that fire rating comes in), a “class 1 hour fire rating” means that the material can resist exposure to a standardized fire for one hour.

Does spray foam increase home value? ›

Conclusion. Simply put, if you want to look for a type of home upgrade that's not only affordable but also provides your home with so many benefits, spray foam will increase the value of your home.

Does spray foam attract mice? ›

Spray foam offers no food value to rodents or pests. The good thing about spray foam when it comes to pests is that it does help to seal up those cracks and crevices where it is sprayed, making it more difficult for those unwanted house guests to get inside.

Do rats eat foam insulation? ›

Filling the cracks and voids with the polyurethane foam acts as a rodent barrier, as mice and other rodents aren't able to chew through spray foam insulation.

Do Bedbugs live in foam? ›

Myth 1: You're safe from bed bugs if you have a foam mattress. Truth: While bed bugs can't live in foam, they can stash themselves in any crevice that's close to your body while you're inert, such as in the small cracks of your bed frame.

How many inches of spray foam do I need in roof? ›

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. Closed cell spray foam should be 4- to 5- inches on the ceiling and 2- to 3-inches in the walls.

How often should a foam roof be recoated? ›

Foam roofs should be recoated every 5-10 years, depending on the quantity and quality of coating previously installed. Common foam roof problems include: Weather damage. Bird droppings & pecking.

What is the best foam roof coating? ›

Polyurethane roof coatings are the most impact-resistant of all the coating options, so if you expect your roof to have a higher than average amount of traffic, polyurethane may be your best bet. There are two primary types of polyurethane roof coatings: aromatic and aliphatic.

How much is a new foam roof? ›

The average roofing installation price for a spray foam roof costs anywhere between $6,000 to $7,200 depending on the slope, pitch, and size of your roof. You can expect to pay $2.50 to $3.00 per sq. foot or $250 to $300 (1″ of Foam) per square installed on a standard sized single story home.

Does spray foam hurt shingles? ›

What this study means is that you can insulate the roof deck of your home with foam insulation without any adverse effects to your shingles. Foam insulation creates thermal resistance, which is keeping the hot air out during the summer and the cool air inside.

How do you maintain a foam roof? ›

Regular clean-up and upkeep of your foam roof

As with any roof type, regular cleaning is imperative to ensure that it can last for as long as possible. The same principle is true for your foam roofing system. Thoroughly examine all signs of roof damage at least once every year, especially after any storm or heavy rain.

Is spray foam in the attic worth it? ›

This is why insulation and air sealing are important home improvements to make at the same time. Luckily, spray foam insulation can both insulate and air seal at the same time, and it's also a powerful moisture barrier, offering a strong level of protection for your home against the outside elements.

Can water seep through spray foam? ›

Let's answer the burning question, can spray foam insulation prevent water damage. Spray foam insulation is the only type of insulation that will prevent outside moisture from entering your home. Other types, such as fiberglass, won't provide enough of a barrier to keep the water out.

Can you put a foam roof over shingles? ›

Advantages of Using Spray Foams on Existing Roofs

We know that spray foam can be installed over an existing roof, but what are the benefits of doing so? If you can add insulation to your existing roof, you don't have to pay to tear it down and build a new roof.

Do bugs like foam insulation? ›

Insects don't seek foam materials as a food source but can become a nuisance when they are attracted by food or want to use our foam materials as a shelter for resting. Airpop® EPS (expanded polystyrene) is valued by the construction industry for its moisture-resistant properties.

Where should you not use spray foam insulation? ›

You should not use spray foam to insulate areas around recessed ceiling canister lights. If you spray too close to the top of ceiling light boxes, you can trap heat and increase the risk of a fire.

Does spray foam shorten shingle life? ›

Insulating Your Attic with Spray Foam

While spray foam won't cause any damage to the roof shingles, some contractors will still void the warranty because they are stuck in that old way of thinking.

What foam do roofers use? ›

The majority of foam roofs are composed of a material called "Spray Polyurethane Foam" or SPF for short. This is typically composed of a combination of two chemicals, we'll let Wikipedia explain more below. SPF is essentially the same exact material as the foam you see used on the interior of buildings for insulation.

Does spray foam need to be covered? ›

Because any type of spray foam is combustible, along with most other building materials, we need to protect the wall from the foam. By installing gypsum board over the foam, we have protection on the inside of the building for a life-saving purpose.

Do you need a ridge vent if you use spray foam insulation? ›

One of the biggest benefits of using spray foam is to get greater airtightness. That means you get rid of attic ventilation, whether it's passive (ridge, gable, soffit vents) or active (fans). Actually, you should get rid of power attic ventilators whether or not you're sealing the attic, but that's another article.

Is 2 inches of spray foam enough? ›

2 inches of spray foam is enough in particular situations while using a particular type of foam, but it is not a universally accepted standard for sufficiency. When using closed-cell foam in walls, it is generally considered sufficient when 2 to 3 inches are sprayed.

How much weight does spray foam roof add? ›

So, let's get to it, how much does spray foam weigh? Spray foam that's used for a roofing system weighs about one pound per square foot.

How much does it cost to foam a flat roof? ›

The average cost of spray foam roofing is between $5.00 to $8.00 per square foot (or $400 to $700 per square) with general material and labor included.

Do roofers start at top or bottom? ›

4. Work from the bottom up. Not only are we working from the bottom of the roof, we're also starting with the bottom-most layer, in terms of roofing components.

How do you tell if a roof is properly insulated? ›

While you're at it, feel the ceiling and see if it seems strangely hot or cold in any area. If any rooms have odd temperature changes, there's a good chance that the insulation in that area is poor and will need to be replaced.

Should insulation touch the roof? ›

The airflow from the soffits to the ridge vent keeps the roof cool and prevents ice dams, and the material will block that flow. For the same reason, insulation shouldn't touch the roof's underside. Staple plastic or foam baffles to the roof sheathing, near the eaves, to keep the material away.

What temperature is too cold to roof a house? ›

Manufacturer Specifications for Cold

It really is too chilly for roofing in cold weather when temperatures fall below 40° F (4° C). Many roofing materials have adhesive properties that require the sun's heat to activate.

Can it be too cold to roof a house? ›

The best temperature range for roof installations is between 70 and 80 degrees Fahrenheit (21-27 degrees Celsius), but when is it too cold to roof? It really is too cold when temperatures drop below 40° F (4° C). Many roofing products have adhesive properties that require the sun's heat for activation.

Can you spray foam the underside of your roof? ›

Unvented Roofs with Applied Spray Foam

Open-cell spray polyurethane foam or closed-cell spray polyurethane foam (ccSPF) insulation can be sprayed along the underside of the roof sheathing to provide a conditioned and insulated attic space that can be durable and efficient in all climate zones (see Figure 1).

Can too much insulation cause mold? ›

Unfortunately, too much insulation and a tightly-sealed house can lead to moisture concerns. Any dampness may develop in the growth of mold or mildew. The production of mold or mildew can reduce indoor air quality and greatly affect your respiratory health.

What is the best way to insulate a roof? ›

You can use batts, polystyrene slabs, expanded polystyrene or spray foam to insulate your roof or loft space. Spray foam is usually a job undertaken by professionals. Although there are DIY options available in the marketplace. One of the advantages of warm loft insulation is that it is ideal for a flat roof.

Does spray foam insulation meet building regs? ›

Does Spray Foam Insulation Meet Building Regulations? Unlike other non-conventional insulation materials, Icynene spray foam insulation does have BBA approval and therefore can be use in compliance with Building Regulations.

Can you wrap renovation costs into a mortgage? ›

Once you have a budget for renovations, you can start to consider your options for adding that cost to your mortgage. In doing so, the remodeling costs would be tacked onto your initial loan amount (the money needed to purchase the home), creating a new combined total balance for your mortgage.

Does spray foam keep radon out? ›

It is already a common knowledge that the spray foam is the superior choice for insulation providing high radon-protection to the building where applied. Spray foam creates a continuous air barrier that acts as the first line of defense against not only radon but also other malignant gases.

Does spray foam insulation need air gap? ›

Icynene Spray Foam Insulation and you can move. back into your home two hours after your installation.

Do I need a vapor barrier if I use spray foam insulation? ›

Does spray foam need a vapor barrier on top (e.g. tarp)? The closed cell spray foam doesn't need a vapor barrier because the spray foam itself functions as a vapor barrier, air barrier and thermal barrier too. However, the open cell spray foam needs a vapor barrier.

How can I reduce the cost of remodeling my house? ›

20 Ways To Cut Home Renovation Costs
  1. Do Your Own Demo. If you have the tools and the time, consider doing demolition work on your own. ...
  2. Have a Budget. ...
  3. Avoid Debt. ...
  4. Develop Detailed Plan. ...
  5. Get Permits. ...
  6. Reuse Materials. ...
  7. Pick Up Your Own Materials. ...
  8. Do Your Own Painting.
25 Jul 2022

Can I borrow extra money on a home loan? ›

You can borrow extra on your mortgage to cover additional expenses, including furniture. Borrowing more money will increase the amount of interest you pay over the life of your mortgage loan. Other options for financing furniture include credit cards, personal loans, home equity loans, and HELOCs.

Does spray foam ruin roof? ›

Moisture from indoors can diffuse through the foam and find the cold roof sheathing, where it accumulates and eventually rots the roof. As a result, in IECC climate zones 5 and higher, building codes require the use of a vapor retarder if you install open-cell spray foam.

Do you need a ridge vent with spray foam insulation? ›

There are different types of insulation and you want to choose what is right for your home. One of those is spray foam. Do you need attic ventilation with spray foam insulation? No, spray foam insulation is applied to the ceiling and creates an air-tight seal.

Does spray foam insulation cause mold? ›

There are air leaks in the spray foam insulation - at FOAM SPRAY INSULATION TYPES we warn about inexpert application of spray foam that leaves gaps, holes, air leaks. Building air movement through such openings may bring moisture as well as organic dust that invite mold growth.

Will running a fan reduce radon? ›

In some cases, radon levels can be lowered by ventilating the crawlspace passively, or actively, with the use of a fan. Crawlspace ventilation may lower indoor radon levels both by reducing the home's suction on the soil and by diluting the radon beneath the home.

Should I walk away from a house with radon? ›

Should you walk away from the deal? Consumer Reports says you don't have to. Radon-related deaths are due to exposure over the course of a lifetime. "You should definitely take it seriously but you really don't need to walk away from the home.

What is the fastest way to get rid of radon? ›

Common techniques include: Sub-slab depressurization, where suction pipes are inserted through the floor or concrete slab into the concrete slab below the home. A radon vent fan then draws out the radon gas and releases it into the air outside. This is the most common type of system.


1. Spray Polyurethane Foam Installation - Setup to Completion (Parma, OH)
(West Roofing Systems, Inc.)
2. Spray Foam Insulation — The Ugly Truth?
(Skill Builder)
(SPEC Technologies)
4. (Think before foam)Spray foam and Asphalt shingles don’t mix, Spray foam Asphalt shingle killer!
(Aurum Roofing)
5. Spray Foam Roofing for Existing Roofs - A Beginner’s Guide
(West Roofing Systems, Inc.)
6. The Pros and Cons of Spray Foam Roofing
(West Roofing Systems, Inc.)
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