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Spray Foam Insulation Costs and Savings

Author: Jack Lloyd
Updated: Dec 19, 2023
5 minutes read
  • Average spray foam insulation cost per metre squared
  • Top benefits of spray foam
  • Payback periods by property type

If you’re ready to find out more about spray foam insulation costs and the savings that you could make, this article is for you. Spray foam insulation has become much more popular over recent years, with more and more people now adding it to their homes and business premises. Although many people presume that spray foam insulation is a new solution, it has actually been available for more than thirty years.

One of the reasons why spray foam insulation has become more popular recently is because it has become more affordable and therefore more accessible. In this article, we’ll talk about spray foam insulation costs, whether it can add value to your home and how long you can expect to wait before you see a full return on investment.

Wall in new home under construction with spray foam insulation

How Much Does Spray Foam Insulation Cost?

It's difficult to give an accurate spray foam insulation cost. There are many factors that might determine how much you'd pay. These include how much insulation you need, which parts of your building need to be sprayed, how big your property is, how long the job will take, and so on.

Spray foam insulation cost is also dependent on the thickness you need, as is the type of spray foam you opt for. The two main kinds of spray insulation available are open cell and closed cell. Open cell is the cheaper option, whilst closed cell can be up to £47.50 per metre squared.

To learn more about how much loft insulation is, see our guide for more in depth costs.

Can Spray Foam Insulation Add Value to Your Home?

There’s a big chance spray foam insulation could increase the value of your home. This is because homes with good insulation tend to be more in-demand. Over half of all property purchasers now consider energy efficiency important when they’re looking for a new home. Despite what spray foam insulation can cost, there are obvious benefits to receive.

How expensive are uninsulated or badly insulated homes to run?

If you don’t have any insulation, or if your home is poorly-insulated, you could be paying much more for your fuel bills than you need to. It’s said that uninsulated homes lose around 40% of heat during the winter months. This causes your HVAC systems to work harder, which in turn leads to a rise in energy bills. You can keep these savings in your account by paying spray foam insulation costs.

How Much Can Spray Foam Insulation Reduce My Energy Bills?

It’s said that spray foam insulation could help you to cut your energy bills by approximately £45 each month, a figure that equates to over £500 each year. Although the initial spray foam insulation cost may seem high, you stand to get your money back over time thanks to the way the insulation can help you cut your energy bills. Spray foam can last for more than 20 years, so you can expect to see a good return on investment.

According to Paragon Protection, older properties could see as much as a 20% reduction in heating and cooling costs after installing spray foam.

What Are the Key Benefits of Spray Foam Insulation?

There are many benefits attached to adding spray foam insulation to your home. One of the biggest advantages of paying spray foam insulation costs is that it can make your home more thermally efficient. Spray foam is designed to create an airtight seal so holes, cavities and cracks are filled. This means you can expect to see no heat loss during the winter or heat gain in the summer months.

Another advantage to paying the spray foam insulation cost is that it offers a strong sound barrier, helping to keep external noise outside. Spray foam insulation can also help you gain more control over moisture inside your home.

Why Are People Being Encouraged to Invest in Insulation?

The UK has a big problem with insulation, and around two-thirds of homes are rated at D or below in their Energy Performance Certificates. Two of the biggest issues bad insulation is causing are high energy bills and carbon emissions. This is why people are being encouraged to purchase efficient insulation, including what spray foam insulation can cost. This kind of insulation is widely regarded as one of the best and most effective options around. One of the reasons that spray foam is more expensive than many other types of insulation is that it locks in heat so well.

What Might Make Spray Foam Insulation Costs Rise Further?

Tradespeople tend to charge around £150 to £200 a day when installing insulation. However, other jobs may need to be carried out, such as loft boarding or relocating the electrical wires in your home. This means that spray foam insulation can cost more than expected. Some studies found that spray foam insulation can reduce your bills by as much as 50%, which is one reason why so many people are paying for it despite the relatively high price tag. The average R-value of spray foam insulation is somewhere between 5.6 and 8 per inch. This is a much higher R-value than you’ll get from other widely available forms of insulation.

How Much Can I Expect To Pay per m²?

Spray foam insulation can cost up to £90 per m², though can start at around £40 m². The price that you pay per square meter will depend on factors like how thick the insulation is and which option you go for. Though the costs can be high, spray foam can prevent the growth of mould.

When Am I Likely To Get My Money Back After Investing in Spray Foam Insulation?

It can take a while to see a full return on investment after you have installed spray foam insulation. It can take somewhere between three and nine years for you to break even. Factors that determine the length of time that it takes to see a return include the type and size of your property. You can see how this is affected below:

  • Typical house: 9 years
  • Bungalows: 7 years
  • Flat: 4 years
  • Maisonette: 7 years

Even though spray foam insulation can cost much more than other types, the benefits in savings provide a relatively small window for you to recoup those losses.

What are some cheaper alternatives to spray foam insulation?

If you are interested in purchasing spray foam insulation but your budget cannot stretch to it, there are alternatives available to you. Fibreglass is an affordable option that’s rather effective, if not as efficient as spray foam. One of the biggest advantages of fibreglass is that it tends to be simple to install in many properties. You are more likely to experience problems with installation if you’re trying to fit it in smaller spaces or obstacles, which is why the spray foam insulation cost is a bit higher as it doesn't have this problem.


Overall, there are many big advantages to installing spray foam insulation in your home. Although spray foam insulation costs can be off-putting to some, most people get their money back within a decade. It could take a considerably shorter period of time to see a full return on investment if you live in a smaller property. More and more home and business owners are now opting for spray foam insulation when they are looking for highly effective ways of trapping heat inside their homes. The popularity of spray foam insulation only looks set to grow over the coming years. Just remember to make yourself aware of the drawbacks of spray foam insulation as well as the advantages before you go ahead and have it installed.

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