Open Cell Spray Foam Insulation

Open-cell spray foam is perfect for insulating all those hard to reach places of the home, as well as soundproofing, too.

What is Open-Cell Foam Insulation?

Open-cell foam insulation is one of two types of foam insulation, the other being closed cell foam insulation. Open-cell spray foam is the go-to form of insulation for many homeowners.

Largely because it perfectly insulates residential homes, with its expansive capabilities, expanding up to 100x in size, it can cover large areas with ease.

Open-cell spray foam is often cheaper than its counterpart due to its expansive capabilities. It is very effective when used for; soundproofing, the prevention of mould, and thermal efficiency.

Open-cell vs. closed-cell spray foam insulation

Open cell Foam

Benefits of Open-Cell Spray Foam Insulation

Open-cell insulation is a great thermal insulator, but did you know it can also offer other benefits to your property? Check out some of the benefits of this unique foam insulation below.



Expands up to 100x from its sprayed application, easily insulating all areas of your property and ensuring a full fill of the air with no gaps for hot-to-cold air transfer.



Cheaper form of foam insulation compared to closed-cell, and it's highly effective. The comparative saving compared to traditional forms of insulation means that spray foam insulation is a more viable option for cost-effective home insulation.



Open-cell foam has superior soundproofing properties to reduce noise pollution. If you live near an airport, next to a noisy pub or club, or are conscious of the noise you’re making indoors - open-cell insulation can absorb up to 40% of the sound as it travels through the air.


Energy Efficient

Has great thermal properties, keeping in heat throughout winter and cooling in summer. The temperature of your property can be properly regulated all year round as sufficient insulation will save you money on your energy bills.


Prevent Mould

Open-cell composition allows for breathable insulation, preventing mould growth. With the addition of a membrane applied between your roof tiles and insulation - you can allow moisture to travel through, rather than being trapped and causing condensation and mould.


Air Impermeable

Reinforces soundproofing ability by being air impermeable, very effective for homes. Not only this, but the fact that the open-cell insulation expands up to 100x its original size means that a full fill can be more easily achieved.



Contains no harmful gases, an odourless spray foam application for great results. Our water-blown open-cell spray foam has a low potential to harm the environment (known as a GWP) and can be left exposed in an uninhabited loft area. .



Reduce your carbon footprint with this 100% water-blown spray foam open-cell insulation. As mentioned, the low GWP of water-blown spray foam makes it an eco-friendly alternative to traditional insulation - that would also have a lot more waste material than open-cell insulation.

Open cell Foam

Open-Cell Foam Areas of Application

Open-cell insulation is a specific form of insulating foam that can be applied under a variety of circumstances. Our industry experts recommend using an array of insulating materials on your property for optimum effect.

Areas of a property that will benefit the most from open-cell spray foam insulation include:

• Above Grade Exterior Walls

• Roof Lines

• Attic Floors

As well as any areas of the property that would benefit from soundproofing, such as an attic bedroom.

Open-Cell vs Closed-Cell Foam

It is important to understand the different types of spray foam insulation in order to know where they should be applied. The two variations of spray foam; open-cell and closed-cell, differ on a myriad of levels, such as: structure, application, density, composition and their R-Value.

Both open-cell spray foam and closed-cell can be used for commercial and residential properties, as they both offer high performance insulation, and offer strong energy efficiency values. However, it’s important to note the application differences and why each variation of foam insulation is better suited for particular areas or outcomes. For example, if you want to provide soundproofing benefits for a room, you would choose open-cell spray foam.

Open-cell vs. closed-cell spray foam insulation

  • Highly expansive form of foam insulation.
  • Open cell composition for acoustic insulation.
  • Prevents the growth of mould.
  • Air impermeable properties, ideal for soundproofing.
  • Lower R-Value than its counterpart, closed cell foam.
  • More cost effective and easier application.
  • Sustainable insulation, highly energy efficient.
where to get closed cell insulation supplier

Let Us Take Care of Your Open-Cell Insulation Needs!

Investing in open-cell spray insulation for your home or commercial property is a wise and important move. At Eco Spray-Foam Systems, we empower people to make the right decisions by providing expert advice. Having been in the industry for over two decades, we’ve accumulated an abundance of insulation knowledge, experience and expertise.

If you want to enquire about open-cell spray foam insulation, home insulation ,or commercial insulation, then we will be more than happy to provide you with the information you need.

We are an Icynene-accredited insulation provider, trusted by many companies and certified by many insulation boards, such as the NIA (National Insulation Association) and CIGA (Cavity Insulation Guarantee Agency).

We’ve successfully completed insulation projects across the whole of the UK, including London and Manchester, and have helped people achieve their property goals through open-cell foam insulation. You can see what our wonderful clients had to say about us on Checkatrade, where we have an impressive score of 9.5/10.

So what are you waiting for? Start your open-cell insulation journey today. Simply fill out our contact form, and one of our helpful experts will be in touch with you soon.


  • Does Open-Cell Foam Form an Air Barrier?

  • Yes - as opposed to more traditional forms of insulation, spray foam insulation forms an airtight barrier for your insulation needs. Insulation that doesn’t feature an air barrier such as fibreglass and insulation board can allow for a cold-to-warm air exchange if even as little as a millimetre is left between your insulation and the rafters. Due to its expansive nature, spray foam insulation ensures a full fill of the application area.

  • Can Mould Grow on Open-Cell Foam?

  • Although open-cell foam can absorb water, more so than its closed-cell counterpart, its material composition makes it ideal as it does not and will not act as a food source for mould. Therefore, if the insulant gets wet there will be no mould growth. Additionally, upon drying, the open-cell product can return to its original state without distortion, completely reviving its full effectiveness.

  • Is Open-Cell Foam Toxic? Is It Safe For the Environment?

  • Our open-cell spray foam is water-blown, meaning it is much safer for the environment than those blown with dangerous chemicals known as HFCs. Therefore, our open-cell foam has a global warming potential (GWP) of 1, meaning it is as safe for the environment as carbon dioxide. Spray foam with a HFC blowing agent can be up to 1500 times more harmful to the environment.

  • Is Open-Cell Spray Foam a Good Sound Barrier?

  • Due to its light composition, especially in comparison to closed-cell foam, open-cell spray foam insulation is structured and composed for benefits in soundproofing properties. Because of the expansive nature of the foam, expanding up to 100x its size from liquid state, the insulation can cover all nooks and crannies of the desired insulation area. The open-cell foam properties provide an effective air barrier, which is able to block sound and reduce noise pollution. Therefore, foam insulation can cover the entire insulation area, has light open-cell properties and its air impermeable features can block and reduce sound.

  • When Is Open-Cell Insulation Used?

  • Open-cell spray foam is most commonly used in residential properties but can always be used in a variety of different projects. Due to the products light and airy composition, it can be easily removed - unlike closed-cell spray foam which sets more rigid. We highly recommend open-cell spray foam for your home, as the alternative can lead to problems with your roof due to the way it sets.

  • Can I Get a Mortgage With Spray Foam Insulation?

  • Gone are the days when mortgages were affected by the presence of spray foam insulation. A wide range of mortgage lenders will now offer mortgages on properties with open-cell spray foam present - this was not the case around 10 years ago. At Eco Spray-Foam Systems, we offer you the best impartial mortgage advice surrounding spray foam insulation.

Advantages Of Spray Foam Insulation

First and foremost, using spray foam insulation, whether that may be open cell or closed cell foam, has many advantages over traditional forms of insulation. This insulation type is one of the most innovative available on the market today, it can quickly and effectively insulate homes and it is one of the most eco-friendly and environmentally sustainable insulations available. The foam itself will also provide highly effective insulation results on your home or commercial property. Its simple application and ability to meet project outcomes makes spray foam a strong candidate and a go-to when choosing what insulation to use.

Advantages of Spray Foam
Why do you need open cell insulation

The Essentials Of Spray Foam Insulation

Some essentials to bear in mind with open cell spray foam insulation are: it is a light and more expansive form of foam insulation, it is easily applied to the area of insulation, covering all nooks and crannies. The open cell composition makes it effective at creating an air barrier, providing sound proofing properties.

Additionally, the nature of spray foam insulation is eco-friendly, sustainable and the material is even composed of recycled materials. As a leading in UK insulation, it is our responsibility to provide greener alternatives to traditional and damaging means of insulation that are currently and commonly used. You can see more about our corporate responsibility here.

Spray Foam: Closed Cell Foam Or Open Cell Foam?

When deciding whether to use open cell foam insulation or closed cell foam insulation, there are a few factors that can help you make this decision.

It is important to decide on your overall goal of this insulation, do you want better thermal resistance properties or are you looking for acoustic insulation? Are you looking for a quicker and cheaper method of insulation installation or are you happy to invest more into your project? Do you need your insulation to be air impermeable or vapour impermeable?

The above are just a few questions to ask yourself that can help you decide on the best course of insulation for your property. You can contact us today for your free consultation and expert advice in helping you make the right insulation decision.

Accredited Icynene Spray Foam Installers

Icynene spray foam insulation is one of the latest and most technologically advanced products available today. We were one of the earliest adopters of this insulating technology and have been officially accredited as Icynene installers since adopting the product in 2012. We want to make sure that our customers are satisfied with each project carried out, which is why we want to be able to offer the highest quality products. Eco Spray-Foam Systems is able to insulate residential properties of all sizes, with the flexibility of our products and the wide array of services we have, we are able to provide a bespoke insulation service.

Open Cell

Open Cell Vs Closed Cell Foam Insulation

Before we dive into the pros and cons of open cell vs closed cell insulation, it is important to note that they are both superior..