What is External Wall Insulation

What is External Wall Insulation (EWI)?


If your house was built prior to the 1930s, the chances are that it will have solid walls. Insulating your solid walls  is a great way to make your home more energy efficient. The insulation will minimise heat loss in the winter, saving you money on your heating bills. It will also stop your home getting too warm in the summer, helping to keep your home at a more comfortable temperature.

According to research, twice as much heat could be lost through an un-insulated solid wall as through an un-insulated cavity wall. However, the great news is that solid walls can be insulated, both internally and externally.

How is EWI applied

For external wall insulation, you need to employ a professional.  The home can be insulated using an adhesive material which is fixed to the wall, then plastered over.  The finish applied to the external wall can be any combination of texturing, painting, tiling, brick slips, masonry work and/or cladding. A survey of your property will be carried out by RamEco prior to installation to ensure the product will work to its full potential and comply with all regulations.

Planning permission and Building Control

As fully accredited professional installers of EWI, RamEco can self certify the insulation works which is required by law. Building regulations must be adhered to and in some instances Planning Permission. This is because this process involves covering the original brickwork and could significantly alter the current appearance of the property, impacting the character of the local area. Once any planning permission has been granted, the home can be insulated. RamEco will carry out all the checks for you so you can have peace of mind that your product not only complies with Building Regulations but also has full permission.

Advantages of External Wall Insulation


  • Save up to £460 per year on your energy bills.
  • Increase the market value of your property.
  • Less disruption to the household than the alternative of Internal Wall Insulation, as the work is carried out outside
  • Renews your home’s external appearance and increases the lifetime of the brickwork.
  • Reduces penetrating damp and condensation issues such as black mould.
  • Complements other refurbishment work and aesthetically improves your homes appearance.
  • Reduces noise from outdoors with its soundproofing qualities.
  • An opportunity to fill cracks and holes in the brickwork, which will help reduce draughts

Guaranteed for 25 years

As Green Deal Approved installers, we can offer a 25 year Insurance Backed Warranty for your External Wall Insulation for your peace of mind.

ECO Funding Grants

ECO Grants are currently available for all properties with Solid walls - no Cavity.

RamEco are able to claim the funding on your behalf if your home qualifies. Call us to find out if your property qualifies for ECO funding and let us calculate your entitlement. You might be pleasantly surprised how much you could save.