External Wall Insulation in Liverpool (EWI)

What is External Wall Insulation?

Are you looking for External Wall installers near you? We can help.
External Wall Insulation (EWI) refers to the process of fitting insulation to the outside walls of a building. This method is particularly useful for homes that lose a lot of heat through their walls, which is common in older buildings that might not have been built with insulation in mind. We are expert installers of External Wall Insulation, and can offer you a bespoke quote today.

Why Consider External Wall Insulation?

Energy Efficiency: By insulating the external walls, you reduce the amount of heat escaping from your home. This means your heating system doesn’t have to work as hard, leading to reduced energy bills.

Improved Comfort: Homes with EWI maintain a more consistent temperature, as the insulation keeps the heat in during winter and out during the summer.

Enhanced Appearance: EWI can be finished with a range of materials and colours, giving your home a facelift and potentially increasing its market value.

Reduced Condensation: Insulation on the outside walls can help manage condensation and damp issues within the home by keeping the wall temperature above dew point.

How is External Wall Insulation Installed?

The installation process involves affixing a layer of insulation material to the exterior walls of your home, which is then covered by a protective layer of render or cladding. 
Our process typically includes:

  • Attaching insulation boards directly to the walls or using mechanical fixings.
  • Applying a basecoat render that acts as an adhesive and reinforcement with embedded mesh for extra strength.
  • Finishing with a top coat of render, which can be textured and coloured to suit your taste.

Types of Materials Used for External Wall Insulation

Insulation Materials: Common materials include expanded polystyrene (EPS), rock wool, and phenolic foam, each offering different levels of insulation and price.

Render Types: You can choose from various renders such as acrylic, silicone, or mineral renders. Silicone render is popular due to its water-resistant and breathable properties.  You can see all our render types here.

Planning Permission and Regulations

In the UK, external wall insulation is generally considered to be permitted development (not requiring planning permission) unless your property is listed or in a conservation area. However, it’s always advisable to check with your local planning authority before proceeding. We can help you with this.

Costs and Savings of Rendering your house

The cost of external wall insulation varies depending on the size of your home and the type of materials used, but generally ranges from £5,000 to £15,000. While the upfront cost is significant, the energy savings over time can be substantial, typically reducing heating bills by approximately 25%.

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