Feature your business on Spotdif
Learn more
Spotdif Logo

Save Hundreds Per Year With Spray Foam

Compare and save by finding the perfect spray foam supplier with SpotDif.

100% Free
and no obligations
Match with
local accredited installers
your monthly energy bills
What's In This Guide

Compare spray foam insulation cost & providers near you

Find the best deals on spray foam insulation with SpotDif. We make finding trusted local suppliers quick and easy.

Effective loft and wall insulation are key to keeping your property comfortable and energy-efficient. Although there are many types of home insulation available, spray foam is becoming a popular method for properties across the UK.

As well as keeping you warm in the winter months, this insulation method offers a plethora of benefits that contribute to a more sustainable, comfortable, and cost-effective living environment. By creating a seamless barrier, spray foam insulation significantly reduces heat loss, ultimately resulting in substantial energy savings and lower utility bills over time. 

Plus, it's a great way to reduce your environmental footprint and contribute to a more sustainable lifestyle. It also works to eliminate drafts, cold spots, and condensation issues, creating a more pleasant living environment. 

But installing new insulation is a significant investment, and you want to make sure you’re getting the highest quality service at an affordable price. 

At SpotDif, we understand the importance of finding the best spray foam insulation cost and the best deals. However, we also know that affordability shouldn’t come at the cost of quality. That's why we offer a comprehensive database of reputable insulation companies across the UK. Using our state-of-the-art platform, we’ll compare different spray foam insulation suppliers to find you your top provider. All you have to do is take your pick and make the most of the savings. 

Start your search today for a cheaper spray foam insulation cost. Want to learn more about spray foam insulation and decide whether it’s a good option for your home? Read on to discover the benefits of spray foam and how to choose the best supplier.


Where did spray foam come from?

Spray foam insulation (sometimes called expanding insulation foam) has been around in some capacity since the 1930s and 40s. However, the insulation material as we know it really came to the home improvement market in the 1980s. Since then, it has become a popular insulation choice for homeowners up and down the country. 

But what exactly is it and how does it work? Spray foam insulation utilises a unique combination of chemicals to create a foam-like substance that seals and insulates your home. It starts as a liquid mixture which, when sprayed onto surfaces, expands and hardens into a solid, durable, and energy-efficient insulation layer.

The science behind spray foam insulation

The magic of spray foam insulation lies in its chemistry. It consists of two main components: polyol resin and isocyanate. When these two ingredients combine, a chemical reaction occurs, resulting in the expansion and formation of the foam. This expanding foam quickly fills gaps, cracks, and crevices, creating an airtight seal that effectively blocks the passage of air and provides superior thermal insulation.


What are the different grades of spray foam?

You may have heard that there are different grades of spray foam insulation — and that’s true. Each variety has its own unique characteristics and applications, so it’s handy to have some background knowledge of these different grades. However, you can also speak to an insulation supplier to determine which grade is best for your property. 

So, what are the two primary grades of spray foam insulation? 

  • Open-cell foam: This insulation is a type of low-density foam. The cells don’t completely close,  allowing air to fill the open spaces within the material. Open-cell spray foam tends to be softer and more flexible than its closed-cell counterpart. Because of its flexibility and excellent sound absorption properties, it makes a good insulation choice for interior applications such as walls, ceilings, and soundproofing projects.

  • Closed-cell foam: In contrast, closed-cell spray foam insulation is a high-density foam. It consists of cells that are completely closed, resulting in a rigid and dense structure. Closed-cell foam offers excellent thermal insulation properties and acts as a superior moisture barrier. As such, it’s ideal for applications such as exterior insulation and areas that require enhanced structural support.

For the most part, UK homeowners are likely to need open-cell foam, rather than closed-cell.


What are the benefits of spray foam insulation?

So, why should you consider insulating your home with expanding foam?

Thermal insulation

Firstly, it offers exceptional thermal performance by minimising heat transfer, keeping your home warm in winter and cool in summer. Its airtight seal also reduces energy waste, leading to significant energy savings and lower utility bills. Additionally, expanding insulation foam acts as a sound barrier, reducing noise transmission and creating a quieter and more peaceful indoor environment.

Energy efficiency and cost savings

By creating that airtight seal, spray foam insulation reduces energy waste, ultimately reducing financial waste, too. It minimises air leakage, which can account for a significant portion of energy loss in homes. With reduced energy consumption, you can enjoy substantial savings on your utility bills over time.

What’s more, when you use the SpotDif comparison platform to find a better spray foam insulation cost and a great spray foam supplier, you know you’ll be getting the best deal possible. So while this insulation method can save you money in the long run, we’ll help you find those upfront savings, too.

Enhanced comfort

Say goodbye to chilly drafts and cold spots! Spray foam insulation eliminates air infiltration, creating a more comfortable living environment. It provides consistent temperatures throughout the home, ensuring even warmth during winter and improved cooling efficiency during summer. No more struggling to find the right balance with your thermostat.


Expanding insulation foam can be applied to many surfaces, including walls, ceilings, roofs, and even hard-to-reach areas. It conforms to the shape of the space, ensuring complete coverage and eliminating potential air leakage points.

Moisture control and improved air quality

Did you know that spray foam insulation can even improve indoor air quality? It seals out allergens, pollutants, and moisture, preventing their entry into your living space. It can keep mould and mildew at bay, as well as other allergens — which can be especially beneficial if you have any respiratory conditions or allergies.

Noise reduction

In addition to its thermal insulation properties, spray foam insulation also acts as an effective sound barrier. It reduces the transmission of airborne noises, such as traffic sounds or loud neighbours, providing a quieter and more peaceful indoor environment. This is particularly beneficial for homeowners living in busy urban areas or near noisy roads.

Longevity and durability

Once applied, spray foam insulation hardens into a solid and durable material that can last for many years. It does not sag or settle over time, maintaining its insulation properties and effectiveness.

Environmental Benefits

By reducing energy consumption and increasing energy efficiency, spray foam insulation contributes to a greener and more sustainable future. It helps lower greenhouse gas emissions and minimises your carbon footprint, making a positive impact on the environment.

Are there any downsides?

As with any form of insulation, spray foam is not always suitable for every property. There are some disadvantages to consider before investing in spray foam insulation.

Higher upfront costs: It’s worth noting that spray foam insulation is generally more expensive compared to other insulation types such as fiberglass or cellulose. The upfront cost may be higher, but the long-term energy savings can help offset this initial investment.

Plus, with the SpotDif comparison tool, you can make sure you’re getting the best price possible in the first place.

It requires professional installation: DIY devotees may be slightly put off that spray foam insulation requires professional installation. This is due to its specialized application process. However, hiring a professional rather than attempting any type of insulation installation can lead to peace of mind and better results.

Unsuitable for listed buildings or thatched roofs: Spray foam may be unsuitable for certain structures — so if you live in a listed property or a cottage with a thatched roof, another form of insulation may be best. There may be regulations or restrictions that prohibit you from adding spray foam. However, every period property is different, so if you are keen to use spray foam, speak to a professional to see what your home’s suitability is.

Difficult to remove: While expanding spray foam’s durability and longevity is a positive, it can also bring a downside. Once installed, spray foam can be challenging to remove or modify. Although this is great if you know you want to retain it for a long time, the lack of flexibility may become an issue if you plan any changes or renovations in the future. 

As a result, spray foam could impact your property resale value — some potential buyers or appraisers may have concerns. Before going ahead with your spray foam installation, it's advisable to research the market and consult with real estate professionals to understand any potential impact on property value.

Spray foam comparison: is it better than other types of insulation?

We’ve looked at the pros and cons of spray foam, but how does it measure up against other types of insulation? 

Firstly, spray foam insulation excels in terms of efficiency and energy savings. It provides higher thermal performance and better energy efficiency than fibreglass, foam board, wool, and glass wool insulation. Because it’s so flexible, it can conform to irregular shapes and fill in cracks and voids that other insulation methods can’t. This ability to seal gaps makes it far more insulative and energy efficient.

It’s also more resistant to moisture than traditional insulation types. Spray foam serves as a barrier against water vapour, which reduces the risk of condensation, mould, and rot. However, it’s important to remember that spray foam will need professional installation; it's not suitable for a DIY project.

How much does spray foam insulation cost?

As with any home improvement project, there are several factors that impact how much you’re likely to spend on spray foam insulation. Here are the key areas to think about before comparing spray foam suppliers.

  • Project size: How much expanding foam insulation do you need? The size of your project will influence the overall cost. Logically, larger projects with more square footage to be insulated will generally incur higher costs compared to smaller projects.

  • Accessibility: It’s also important to look at the complexity of the project. 

Expanding foam insulation is ideal for filling nooks and crannies but if the installer needs to access hard-to-reach areas or navigate intricate architectural features, you’ll likely need to pay more. 

  • Insulation grade: The insulation grade is another factor that affects the price. Higher-grade foam, which typically has better insulating properties and durability, may come at a higher cost than lower-grade options.

  • Location: Where you live also plays a role in determining the cost of your insulation. Factors such as local labour rates, supply and demand in the area, and transportation costs can influence the overall price of spray foam insulation.  

How much does spray foam insulation cost per square metre?

 On average, homeowners can expect to pay between £20 and £50 per square metre of expanding foam insulation, including both materials and installation costs. However, it is important to note that this range is an estimate, and actual prices may vary based on the specific project requirements and regional factors.

To put this into context, you can expect to pay around £4,500 to fully insulate an average three-bed house in the UK.

To get the most out of your investment, try SpotDif. We compare spray foam insulation suppliers so you don’t have to — save time and find the right provider in a few easy clicks. 

Frequently Asked Questions

Compare spray foam insulation cost and suppliers with SpotDif

SpotDif is your go-to platform for finding the best deals on spray foam insulation, making the process of securing high-quality insulation services more accessible and cost-effective for homeowners across the UK.

With SpotDif, you gain access to a comprehensive database of reputable insulation companies specialising in expanding spray foam. Our comparison tool simplifies the search process by bringing together multiple suppliers and their offerings in one place. This saves you the time and effort of individually researching and contacting different companies, allowing you to compare options conveniently.

Start your search today on SpotDif and join countless homeowners who have successfully found the best deals on spray foam insulation, making their properties more energy-efficient, comfortable, and sustainable.

Anna Dearden
Home sector specialist
I'm driven by curiosity, and constantly seeking to unravel and explore the ever-evolving trends in the realms of lifestyle, finance, and well-being.
Get Free Comparison
No Obligation
It's Free
Results Local To You

Don't Just Take Our Word For It

I saved hundreds of pounds!
By using SpotDif, I saved hundreds of pounds on my new doors.
Jennifer Dunk
257 days ago