External Wall Insulation

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Adding external wall insulation to your house is an effective way to reduce the amount of energy needed to heat your home saving you money on energy bills

External Wall Insulation Cambridge, Cambridgeshire

What is external wall insulation?

Similarly to how we use internal wall insulation, you can utilise external wall insulation to help protect your home and help retain heat. This will prevent heat from escaping through the walls and the cold entering your Cambridge-based property.

Although this will be more expensive than insulating a cavity wall, the money you save on your monthly heating expenses will also be greater. Now technology has developed, so the external appearance of your home does not need to be affected by having insulation material installed on external walls, meaning your Cambridgeshire home will still look perfect!

Our team can provide you with the highest quality of work and various other services across Cambridge and Cambridgeshire to help you save money on your energy bills. To learn more about how you can keep your home warm using the external face of your property, speak to our team today!


How Does External Wall Insulation Work?

In most contexts, "external wall insulation" refers to a covering of insulation fastened to an already-existing wall. To finish this layer, a coat of render or another type of cladding will be applied to safeguard it from the outside environment.

This is a different type of insulation than internal insulation or filling cavity walls; this insulation is added to your external solid walls.

When looking for insulation for the exterior walls of a building, it is strongly recommended that you work with a group of trained professionals, such as our team here at Save Energy World in Cambridge. Not only will our work be of exceptionally high quality, but it will also reduce the likelihood of any damage occurring.

Save Money In Cambridge, Cambridgeshire

Do you need insulation for the cavity, the attic, or the outside of your home? If that's the case, you've come to the correct location; the crew here at Save Energy World can assist you in cutting down on your carbon emissions by installing wall insulation in your house.

We will never turn down a task because it is too much trouble for us, and we will always do an excellent job at an affordable price. Whether it is cavity wall insulation you need or external wall insulation, we have your needs covered in Cambridge.

Increasing the amount of insulation on the exterior walls of your home is an efficient way to cut down on the amount of energy required to heat your home, which in turn will save you money on your monthly energy costs.

Since we are experienced in working with industrial and residential properties, you should always make us your first point of contact. When we implement external wall insulation for customers in Cambridge and Cambridgeshire, you can count on our crew to do an outstanding job every time.


What are the Advantages of External Wall Insulation?

Because of the consistent increase in the cost of energy expenses, increasing the effectiveness of the insulation in your home will allow you to reduce the amount of fossil fuel you use and the money you spend on heating your home.

Therefore, installing insulation on the exterior walls of your house can help improve its green credentials. You will reap the benefits of installing external wall insulation in your home in Cambridge, Cambridgeshire. The advantages are extensive.

You will enjoy the benefits of an even more environmentally friendly home if you use renewable technology to operate your central heating system. What else could you possibly ask for?

We are always searching for new opportunities, so if you get in touch with us, we will install the wall insulation on the exterior of your building as quickly as we can!

External Wall Insulation Diagram
  • It reduces heat loss and energy bills

  • Fewer draughts and increased the sense of comfort

  • It does not disrupt the house while being installed

  • This type of insulation does not reduce internal floor area

  • It allows walls to contribute to thermal mass (the 'tea cosy' effect)

  • It improves not only weatherproofing but sound resistance too

  • It reduces condensation on internal walls

  • It increases the life of the wall

Frequently Asked Questions


Many factors apply to each house: the basic building's age, style and size. Also, when fitting EWI onto a property, consideration is given to the type of insulation board material, the insulation thickness, the render and many different texture finishes.

It can cost from £8,000 upwards depending upon these factors. However, the cost of the work needs to be considered in context of the savings from the reduced fuel use.

Under most circumstances, the answer is no. Dealing with Planning Permission issues is not difficult, and we can assist. Planning Permission is required if your home is Listed in an Area of Outstanding Beauty or a Conservation Area.

It should be obtained before work is started. You may also need planning permission if you live in a terrace house and your external wall runs directly onto a public pavement, as the extra depth to your wall may be viewed as an encroachment into public space.

For most circumstances, EWI is not classed as an extension to the walls. However, under L1B of the Building Regulations, the alteration to exterior fittings and fixtures requires a Building Notice to be sent to the council.

A Building Control Inspector will pop along on the first day to meet the installer and again at the end of the job to sign it off and give you an Approval Certificate.

An EWI-compliant system will save costs by cutting heat losses by around 35-45%. The Energy Saving Trust, an independent organisation, calculates that a typical three-bed semi-detached house will use around £400 less in heating costs if a solid wall home has EWI insulation fitted to the correct standards.

Of course, heating costs depend upon fuel prices at the time, and these are set to continue to rise in the years ahead. Heat loss will take the path of least resistance, so it is important to ensure good loft and roof insulation and that doors and windows are draught proofed.

Otherwise, the gain from the EWI will be significantly reduced.

External Wall Insulation (EWI) is the most thermally effective way of insulating solid wall houses. We install using the most affordable and accredited materials and systems.

Solid walls are described as "Hard to heat and hard to treat", and if you live in one of the 7 million homes in the UK with solid outside walls, you will appreciate the costs involved in trying to keep them warm in winter.

EWI has made it "Easy to treat, cheaper to heat".

A layer of insulation material in the form of insulation boards is fixed to the walls. Three different insulation boards are used: expanded polystyrene, mineral wool and phenolic. The layer of insulation is then covered with a particular type of render.

The finish can be smooth or textured and be the colour of your choice. This will cover the entire external wall of your property.

This depends on the size of your property and the weather. It can be completed in a week on a small property like a terraced house in the summer. However, a large property in late autumn could take up to 3 weeks.

There are several advantages. The main advantage is that you do not lose any internal space as all the insulation is on the outside walls.

There is no need to vacate the house or rooms whilst the work takes place, no need to move furniture and internal fittings and no internal redecoration is required.

It allows thicker, higher-performing insulation to be used, resulting in warmer walls. A final advantage is eliminating any risk of condensation and cold - bridging as the whole building is wrapped in insulating skin.

Insulation boards are attached to the wall using a unique adhesive applied to the rear of each insulation board before being laid onto the wall in a staggered pattern. The boards are then further secured by being mechanically drilled and pinned to the wall.

At the base of the wall, the boards sit in a base rail at the height of the damp-proof course. Once the insulation boards are in place, they are covered with an initial base layer of a specialist polymer bonding render. A nylon mesh is embedded in the render to prevent thermal expansion and contraction cracking.

The render is primed, and a decorative, weatherproof final coat is applied. This process forms an incredibly strong bond with the external wall insulation board. However, it can flex and breathe so that moisture is not trapped in the walls or the insulation layer.

Why Is Solid Wall Insulation A Good Idea?

A cold wall will take heat away from anything around it. Solid wall insulation adds a thermally protective layer to the outside or inside of your home. Here are some more reasons for insulation:

Save up to £650 on energy bills

Save up to £650 on energy bills

Less heat escaping means less energy used to heat your home, saving you up to £650 per year on bills.

Transform your home

Transform your home

You can choose how your home will look on the outside to make it as good as the inside.

Reduce your carbon footprint

Reduce your carbon footprint

Wasting less energy to heat your home means your carbon emissions will drop too.

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          MAKE YOUR HOME ENERGY EFFICIENT

          Choose Save Energy World For External Wall Insulation Cambridge and Cambridgeshire!

          Are you looking for ways to make your home more efficient and cost-effective? External wall insulation Cambridge could be the answer you are looking for. With external wall insulation, your home can benefit from decreased emissions, improved energy efficiency performance, and a year-round reduction in heating costs!

          Not only will it save you money on bills, but external wall insulation also adds protection against draughts and potential damage caused by adverse weather conditions.

          Whether you're insulating an entire house or just a single room, our team of experts has the perfect solution for your needs. To find out more, speak to our team. We can work with pre-fabricated concrete or brickwork buildings to provide your external walls with further insulation! Get in touch to reduce your heating bills in Cambridge today!