External Wall Insulation EWI

Uninsulated solid walls lose heat at a rate of around 45%, meaning that for every £100 spent on heating an uninsulated solid wall property, around £45 is being wasted and escaping into the outside environment.

The good news is solid walls can be insulated and it is one of the most effective home improvements that can be made, with typical savings on gas heating bills of £445 – £475 per year *. If you use oil, electricity or LPG as your heating source then these savings can be considerably higher.

damp genius ewi devon, somerset, plymouth, exeter, newton abbot

Most properties built before 1920 were constructed with solid walls – this accounts for around a third of homes in the UK. There are two ways of insulating a Solid Wall – either externally or internally.

This involves fixing an insulating layer to the outside of the house, and rendering or cladding over the top. Render is generally the cheaper and most popular option. Cladding comes in a variety of forms including brick, tiles, timber or pebbledash. External Insulation is the preferred method of insulating a solid wall for most people and the good news is that there is funding available for External Wall Insulation. To speak to one of our team regarding grants for External Wall Insulation, please contact us.

There are two basic kinds of solid wall: brick, which is typically 225mm thick, and stone which tends to be a lot thicker, and works in a different way.

External Insulation For Stone Walls

A typical stone wall will be constructed of two skins of stone with the gap between filled with rubble. Render or cladding on the exterior of a stone wall can act as a waterproofer and will reduce the amount of moisture penetrating the wall.

External Insulation For Brick Walls

Rainwater will penetrate less far into brick than stone. The critical issue is the dew-point. When warm air meets cold air it condenses and moisture is released. In an uninsulated brick wall that point will be towards the outer surface of the wall. Insulating internally tends to draw the dew-point into the wall. What needs to be avoided is drawing it in to the inner surface of the wall – the best method of preventing this from occurring is to fit External wall insulation.

external wall insulation brick wall devon exeter plymouth torquay taunton

What Is External Wall Insulation (EWI)?

External wall insulation is a highly advanced insulation treatment which is applied to a properties’ external walls. The system comprises of a layer of insulation, a layer of insulating render implanted with reinforcing mesh, followed by a final coat of attractive decorative render finished to your desired effect, maximizing the ‘curb appeal’ of your property.

Features And Benefits Of External Wall Installation

  • External Wall Insulation can save you approximately £490* per year on your bills
  • Enhance the appearance of your home
  • Can reduce condensation and penetrating damp problems in your home
  • Will increase your property’s value by significantly improving its ‘kerb appeal’ and energy efficiency (EPC) rating
  • Provides a high level of thermal efficiency, making your home warm and cosy
  • A variety of finishes available, including hundreds of different coloured renders, brick effect and even pebbledash

* Estimated figures based on insulating a gas-heated, semi-detached home with 3 bedrooms.

Grant Funding

We are occasionally able to obtain partial funding to help towards the cost of Solid Wall Insulation. This funding is allocated on a first-come, first-served basis and is dependent on you and your home meeting specific criteria.

Table of Contents

Contact Us

You can contact us using the form below or any of the contacts at the top of this page. We will be pleased to discuss your damp issue and then, if needed, we will arrange a suitable time to visit to prepare a quote or carry out a survey. 

download how to diagnose your damp free guide

Click the button below

for instant download of your free guide