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Solid Wall (External and Internal Wall) Insulation


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!.




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.


External Wall Insulation


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 on 0330 223 0333 or enter your details in the call back box below.





Figure 1: Photo taken using a thermal-imaging camera, showing heat loss through loft and walls of house (yellow and red indicate greatest areas of heat loss)




Figure 2: Photo taken after external wall insulation and loft insulation had
been installed in property – proving just how effective insulation is at retaining heat and therefore helping to reduce your energy bills!



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.


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.


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.


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, maximising the ‘curb appeal’ of your property.


Grant funding


We are able to obtain funding to help towards the cost of Solid Wall Insulation. This funding is allocated on a first-come, first-served basis.


Please contact us on 0330 223 0333 to arrange a survey of your property.

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