External Wall Insulation ~EWI~


About 35% of all heat loss from UK homes takes place through external walls so insulation can be a great way to improve the thermal efficiency of your home as well as reducing your energy bills.


Most properties built prior to the 1930s were constructed with solid walls, so don’t have cavities that can be injected with cavity wall insulation. For those looking to improve insulation on these solid wall properties, external wall insulation can be a great option.


Because the insulating process involves covering the original brickwork with a series of layers, the process can significantly alter the appearance of the property (in most cases for the better!). Since the outside walls are highly visible, it is advisable to get someone who knows what they are doing to install it. We are experts in providing advice on external wall insulation as well as fitting it.

How is External Wall Insulation applied?

External Wall Insulation systems involve fixing panels of insulation to external walls, which are then reinforced with mesh and silicone or acrylic render finishes applied on top.

There are three types of insulation that can be attached to the outside of the home: expanded polystyrene, mineral wool and phenolic resin.The most popular is expanded polystyrene but we can advise you on which would best suit your property.

Benefits of External Wall Insulation

  • Can save you money every year on energy bills
  • Application causes minimal disruption to the household and its occupants
  • No internal access is needed.
  • Does not reduce the internal floor area of the property where as insulating internally does.
  • Improves the appearance of the property – potentially increasing the property’s value
  • Improves weather proofing and sound resistance.
  • Fills gaps and cracks in brickwork, reducing drafts and heat loss
  • Increases the life of the existing property by protecting the existing wall material from the weather.
  • Reduces condensation on internal walls and can help prevent damp (but will not solve rising or penetration damp)

Please note: external wall insulation is different from external cladding, which has received much attention following the Grenfell Tower tragedy. If you are interested in external wall insulation but are concerned about any safety aspects, please contact us and we’d be happy to talk things through with you,