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External Wall Insulation

Reduce Your Heating Bills by Up to 50% with External Wall Insulation

As energy prices have recently skyrocketed, people have been looking for ways to reduce their energy bills and discovered that with external wall insulation (EWI), they're saving up to 50% on their monthly bills. But not only does it help you save money, it also adds value to your property and improves the overall look of your home too.

How it Works

External wall insulation involves fixing a layer of insulation material to the exterior wall of your home, then covering it with a special type of render (plasterwork) or cladding. It is particular useful in old properties, with narrow or absent wall cavities. The finished result not only sigfnificantly reduces heat loss but also renews the appearance of your home.

Take Advantage of the Reduced 0% VAT Deal

Furthermore, in light of the increased energy prices, the government has dropped VAT to 0% on EWI installation until further notice so this is the best time to do it.

Benefits of External Wall Insulation

  • Reduces heat loss and energy bills
  • Improves the overall look of the home after rendering
  • Increases the energy rating of the property
  • Reduces carbon footprint
  • Future proofs the U rating for your home
  • Increases the resale value
  • Reduces draughts and adds a sense of comfort
  • Improves sound resistance and weatherproofing
  • Can help reduce condensation on internal walls
  • No disruption inside home during installation
  • Does not reduce internal floor area like interior wall insulation does

What is a U Value and Why is it so Important?

The thermal performance of a building is measured in terms of heat loss and is commonly referred to as a U-value (thermal transmittance), or an R-value. U-values (measured in units of W/m²K) determine how effective a material is as an insulator. The lower the U-value, the better it is at preventing heat loss. High U-value materials such as stone, brick, concrete and metal are cold to the touch because they remove the heat from your hand more effectively, so you experience ‘heat loss’. Conversely, low U-value materials such as foam, polystyrene and wool are warmer to the touch because they prevent the heat from your hand, which makes them great insulators.

How Much Does it Cost?

An average three-bedroom semi is likely to cost anything between £5,000-9,000, with a larger detached home in the region of £8,000-15,000.

How Much Can I Save On My Heating Bills?

Installing EWI can reduce your energy bills quite considerably. For instance, if you install insulation with a U-value of 0.31W/m², it can typically reduce your heating energy bills by as much as 50%. As energy prices continue to rise, year on year savings will continue to get bigger too.

Reduce Your Carbon Footprint

The government's plans to reduce the carbon footprint of every UK home means that homeowners will eventually have to make changes to their properties very soon, so it makes sense to do it now whilst there's no VAT to pay and the material prices are still relatively low. As time goes by and the demand grows, you can imagine the prices may increase also.


How long does it take to fit exterior wall insulation?

Anything from 4-7 days depending on the size of the property and as long as there are no problems or bad weather conditions.

How thick is it?

Thicknesses vary from 30mm to 125mm. The thicker it is, the better the insulation.

Is there a guarantee with it?

Yes, we offer a 10 year guarantee on all work done.

Do I need planning permission?

In most cases planning permission is not required but if you want to be certain, do check with your local authority to make sure. For listed buildings and homes in Conservation Areas it is doubtful that consent may be given.

What type of material is used for External Wall Insulation?

The material we use is EPS (Expanded Polystyrene) which offers the best price/performance ratio compared to any other insulation material and is quick and easy to install and offers a great finish.

*Savings may vary depending on the type and thickness of insulation used, as well as the current energy efficiency of your home. Contact us for a personalized quote.


We're proud to share what our clients have to say about us..

A resurfacing of a house extension.

The team was professional, efficient and always on time. The insulation and rendering was done to a very high standard and has made a significant difference to the energy efficiency of my home.

Nikita Copley

An upstairs resurfacing & insulation

Its the best thing we've done as the upstairs now is nice and warm and we don't have to turn the heating on or keep it on for long.

Gary & Sue

A partial exterior rendering on a home extension.

Kept in regular contact with regards to dates and turned up as promised, doing a great job. We are now saving to do the rest of the house and I would definately recommend Matt.

Lee Griffith


For any enquiries or to request a quotation for your next project, feel free to get in touch with the form below. Or give us a call on 01133 224 223.