External Wall Insulation

External Wall Insulation (EWI) is a thermal efficient way to make your home warm and more comfortable, help save money on energy bills, and reduce the use of fossil fuels to boost the sustainability credentials of your property. It can also revamp the external appearance of your home.

EWI forms a layered shield to protect your home by stopping the heat escaping, regulating the temperature indoors, and helping to tackle condensation, damp and mould.

Simply put, this is done by adding Expanded Polystyrene Insulation (EPS) boards to the external walls of the property before coating with an adhesive basecoat, fibreglass mesh, a special type of silicone topcoat render, and completed with a decorative finish.

EWI is achieved by firstly making sure the surface of your outer walls are free from dust and mould.

An adhesive basecoat is applied, before EPS boards are attached and reinforced with insulation fixings. Any existing facias, soffits, gutters and gullies can be replaced or amended to suit the property. Get in touch with us to see how these can be substituted or adjusted. Where possible, we always use 100mm EPS to give the best U-value to your building. But where 100mm isn’t achievable in some properties, we recommend using 50mm EPS, as a minimum, to boost the U-value of your home.

On top of the insulation fixings, another adhesive basecoat is applied, and fibreglass mesh is added to make it hardwearing and avoid future cracks. A substrate primer is then applied and finished off with a silicone topcoat render, which is highly breathable, has high water resistance and premium durability.