External Wall Insulation (EWI)

Research has shown that 35% of a building’s energy can be lost through external walls, even more if the wall is weathered or cracked – a fact that most people never consider.

An External Wall Insulation (EWI) render system will cover your building with a waterproof barrier, one that will give you all-year-round protection, helping to keep your precious energy inside. Due to it being a through colour product, it also requires no maintenance.

A typical insulated render system includes the attachment of insulation boards to the existing substrate using mechanical fixings, sometimes accompanied by adhesive. This is followed by a flexible and fully breathable basecoat which has reinforcing mesh trowelled throughout the entire surface, to prevent cracking and the fitting of rust-free plastic beading. To finish, we apply a final coat which is maintenance-free, and both the colour and decorative finish can be chosen.

The design and installation of an insulated render system is a specialist job. The construction techniques remain the same, but the systems differ through their use of components such as the thickness and type of insulation, and the render finishes available.

Quality has and always will be a major factor in who we decide to partner with.

We are proud to be working with the five leading suppliers of insulated render systems, therefore, we can offer greater flexibility on the right system for your project and budget. We will, of course, talk through all of your requirements in-depth during the quotation stage.

With a massive range of colours and textures available, we will ensure that your property has a zero-maintenance treatment that not only looks great but actively reduces your carbon footprint.

External Wall Insulation

Our Process 

EWI Before


EWI During


EWI After


The Benefits 


Drastically reduces environmental impact


Eradicates damp and condensation


Give your building an attractive look that will never need painting


Increases the value of your property


Lowers utility bills


Reduces external noise


Up to 12 years warranty


Warms the building rapidly and keeps the warmth from escaping

Related Services

Monocouche Render Systems

Silicone Render Systems

Maintenance & Repairs

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