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Cavity Wall Insulation

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We are specialist cavity wall insulation installers who have installed cavity wall insulation for thousands throughout the UK.

With installers based throughout the UK we can offer competitive prices and in July 2024 are able to get costs to you very quickly.

One of the most important factors to consider with any property is insulation. If you’re building or buying a home or commercial centre, you need to focus on how well the property is insulated.

Poor insulation will end up costing you a lot of money since you’ll have to do repairs to improve the insulation or you’ll be consuming a lot of energy that will be costly.

Cavity Wall Insulation can help you avoid such situations. We can help improve your insulation if you have an existing cavity wall or if you’re thinking about adding one.

We offer a number of great Cavity Wall Insulation services and are more than happy in assisting you on anything from price, to dimensions, to specification.

Who are Cavity Wall Insulation?

We are Cavity Wall Insulation, a UK-based business dedicated to providing high-quality cavity wall insulation services.

With years of experience in the industry, we have established ourselves as a trusted name in the field of energy-efficient solutions.

Our mission is to help homeowners reduce energy consumption, lower utility bills, and create comfortable living spaces.

At Cavity Wall Insulation, we understand the importance of insulation in enhancing energy efficiency and reducing carbon emissions.

Our team of skilled professionals is committed to delivering exceptional service, utilising the latest techniques and cavity wall insulation materials to ensure optimum insulation performance.

Why Use Us?

At Cavity Wall Insulation, we pride ourselves on delivering top-quality service and exceptional results.

When you choose us for your insulation needs, you can trust that you’re in capable hands.

Our team of experienced professionals is dedicated to providing efficient and effective cavity wall insulation solutions, from installation to removing cavity wall insulation, all tailored to your specific requirements.

Over 10 Years Experience

With over 10 years of experience in the field, Cavity Wall Insulation has established itself as a trusted and reliable provider of cavity wall insulation solutions.

Our extensive knowledge and expertise in the industry allow us to deliver exceptional results that exceed our clients’ expectations.

Throughout the years, we have successfully completed numerous projects, catering to both residential and commercial properties.

Our team of skilled professionals is well-versed in the latest techniques and industry best cavity wall insulation, ensuring that every installation is carried out to the highest standards.

What Is a Cavity Wall?

Some walls are made with two layers and a space between them. Space is what is known as a cavity, and even though it is small, it can cause damage is not insulated.

Its main function is usually to prevent rainwater or excess moisture from getting into the interior sections of the walls.

However, it can also absorb heat from the inside, thereby leading to consumption of more energy for heating.

We always recommend that the insulation be done during installation of the wall, but we can still insulate an existing wall for you.

The insulation process involves an injection of insulation material into space. If you already have the cavity wall, we will create small holes on the walls then seal them up when were done.

Insulation materials also differ, which means that you can find something you like more easily. We can use wool, polystyrene foam, or polystyrene beads.

You can choose whatever fits you by considering the functionality of the material as well as cost.

You don’t have to worry about the wall being damaged by the holes we create as they are usually very small.

We also have the right equipment for the effective injection of the insulation material to guarantee effectiveness.

We will then use techniques that ensure the walls don’t show any indication that they have been drilled.

Cavity wall insulation is a job that should be handled by professionals, and we have the experience of carrying out full cavity wall insulation installations, cavity wall insulation removals and cavity wall insulation replacement.

We have registered installers who can complete the job within hours depending on the size of the wall. You can count on us to deliver beyond your expectations.

Cavity Wall Insulation Materials

Mineral wool (Rockwool)

An effective and environmentally-friendly option, mineral wool provides excellent thermal insulation by trapping air within its fibrous structure. It offers acoustic insulation and is non-combustible.


  • Excellent thermal insulation properties
  • Provides acoustic insulation
  • Non-combustible, enhancing fire safety
  • Environmentally friendly and recyclable


  • Requires professional installation due to its fibrous nature

Cavity Foam Insulation

This method involves injecting foam into the cavity, creating a seamless layer of insulation. It provides thermal performance, minimizes air leakage, and prevents moisture issues.


  • Seamless insulation layer with minimal air leakage
  • Provides effective thermal performance
  • Reduces the risk of moisture issues


  • Requires professional installation for proper foam injection

Polystyrene beads

Lightweight and easy to install, polystyrene beads fill irregular cavities, offering thermal insulation and moisture resistance.


  • Lightweight and easy to install
  • Fills irregular cavities effectively
  • Provides thermal insulation and moisture resistance


  • May settle over time, reducing insulation effectiveness

Cavity Batts

Rigid insulation boards made from materials like glass or mineral wool, cavity batts provide thermal and sound insulation while being durable and moisture-resistant.


  • Durable and moisture-resistant
  • Provides thermal and sound insulation
  • Can be easily cut and installed


  • May require additional measures to prevent moisture penetration

When choosing the right material for cavity wall insulation, consider factors such as thermal performance, moisture resistance, and compatibility with the structure. Consulting with professionals will help you make an informed decision for optimal energy efficiency and comfort.

Cavity Wall Insulation Cost

The cost of cavity wall insulation can vary depending on several factors, including the size of the property, the type of insulation material used, and the complexity of the installation process.

It is recommended to request a personalised quote from a reputable insulation provider to get an accurate estimate tailored to your specific needs, giving you a clear understanding of your exact cavity wall insulation price.

While cavity wall insulation is an investment, it is important to consider the long-term benefits it offers. By reducing heat loss and improving energy efficiency, cavity wall insulation can help lower heating bills and create a more comfortable living environment.

Additionally, many homeowners may qualify for government grants or funding schemes that can offset some of the costs associated with cavity wall insulation, making it a cost-effective solution in the long run.

Knowing If Cavity Wall Insulation Is Good for You

Most of the old walls were made with cavity walls, and they are already insulated.

If you have a property that dates to the last 20 years, then you probably have insulation already. The first step in determining whether you need to add insulation is finding out whether you don’t have one.

We can help you with this by inspecting to check whether the cavity is filled or hollow. We can also help by getting confirmation from your building control department.

Our reliable team will ensure that you don’t go through the process of preparing for new insulation when you already have one.

We also check additional factors as the width and clarity of the wall insulation. The ideal cavity insulation should have a width of at least 50 mm and should not have any debris or rubble.

Another important factor we check is the condition of the wall. If the bricks are still strong and functional, then they will support the insulation. Since the insulation cannot work if there is excess moisture, we check the probability of flooding around the home.

If the property is in an area that is susceptible to flooding, then we will choose the most resilient insulation material to use.

Our team does a thorough job when conducting such inspections. We will not miss any dampness, debris, or any other item that could interfere with the insulation.

If you would like to receive even more information on Cavity Wall Insulation services, make sure you get in touch with us today!

Benefits of Improving Insulation on a Cavity Wall

The main reason why you should consider cavity insulation is that you will be in a position to save more energy. The cost of installing such insulation is less compared to eh cost of the energy you’ll be using without installing one.

You can contact us for a quote so that you know exactly what you’ll be spending on the installation process and the materials you’ll need.

When we are done, you’ll have less energy bills to deal with, and you’ll even recover the amount you spent on an installer within a short time.

Having wall insulation also ensures that you remain warm even during the coldest weather.

The insulation will prevent loss of heat through the walls, which means that you will retain the temperature you set in the premises.

As a result, you will be more comfortable, and you won’t have to adjust the heating regularly.

Cavity insulation also helps protect the environment by reducing the carbon footprint.

Spending less energy, whether you’re using electricity or gas, mean that you’re not using a lot of fossil fuel.

As such, you’re doing your part in reducing the damage that burning such fuel does to the environment.

Cavity wall insulation is one of the easiest insulations to install. You don’t have to worry about dealing with a big mess created because of the construction.

The entire procedure is less messy, but that doesn’t mean that you won’t get good insulation. You will get a less messy energy-saving option in a faster way.

Our professionals will ensure that the installation process doesn’t experience any issue and runs smoothly.

Choosing the Right Insulation Company

A good cavity insulation company will always prioritize the needs of the client instead of profitability.

At Cavity Wall Insulation, we put our customers above everything else. We will help you choose the best insulation materials for the job and follow quality procedures that guarantee the effectiveness of the insulation.

We also value professionalism and only hire people with the best skills for the job.

Our company is also registered with the relevant insulation bodies. We promote good work ethics together with great qualities that help us to deliver exceptional services.

You need a reliable company with the above additional qualities to serve you. Our customer service team can help you with any questions you may have, and can even undergo a full cavity wall inspection prior to carrying out the works.

Our code of professional practice cannot allow us to fail you, and we guarantee that you won’t need repairs soon after we install the cavity wall insulation. Please contact us today for all your insulation needs.

At Cavity Wall Insulation, we can assist you on the best specifications, costs and prices. Make sure you contact us today for a completely free, no obligation cavity wall insulation quote.

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Make sure you contact us today for a number of great Cavity Wall Insulation services.

Greater London


We absolutely love the service provided. Their approach is really friendly but professional. We went out to five different companies and found Cavity Wall Insulation to be value for money and their service was by far the best. Thank you for your really awesome work, we will definitely be returning!

Joe Dolan

Greater London


We have used Cavity Wall Insulation for many years as they are certainly the best in the UK. The attention to detail and professional setup is what makes this company our go-to company for all our work. I highly recommend the team for the immense work – we highly recommend them!

Will Carter

Greater London

About Cavity Wall Insulation

At Cavity Wall Insulation, are dedicated to providing high-quality insulation solutions that improve energy efficiency and enhance the comfort of your home or building.