Render and EWI solutions offer a quick, cost effective and safe method to protect external facades, improve thermal performance and visually improve the appearance of buildings.
external wall insulation render

External Wall Insulation with render finish is a great way to improve and update the appearance of the existing building. Not only beneficial for aesthetic purposes, but Render will also protect the substrate and provide water resistance, reducing any water ingress and generally acting like a protective layer against the elements.


Technologically advanced silicone and acrylic-based External Wall Insulation systems with impressive performance levels are now readily available. These products allow for flexibility to meet the most demanding designs, façade curvatures, or colour options while at the same time improving and optimising façade performance and durability.


External Wall Insulation Systems predominantly have a Render finish which is suitable for application on a wide variety of buildings. BTS work with many suppliers who have an extensive range of systems to accommodate the requirements of a particular project, from directly fixed systems to systems incorporating a cavity.


The use of insulation within the render system allows high levels of thermal performance to be achieved, with the thickness being calculated based upon the specific wall build-up and the u-value required for the project, improving the overall energy efficiency of the property and reducing carbon outputs.

Our PAS 2030 accredited teams ensure External Wall Insulation systems are designed and installed to the highest standards and provide assurance with the completed project meets compliance with Building and Fire Regulations.
Our External Wall Insulation installations are also backed by The Solid Wall Insulation Guarantee Agency (SWIGA) providing assurance of safe, compliant, quality installations of commercial rendering systems. The SWIGA guarantee offers cover for; external wall, internal wall and hybrid systems for traditional solid wall properties, non-traditional properties such as no-fines concrete and frame buildings. As well as providing cover for low- and high-rise apartments.

Benefits of using Render

Whether to an existing building or a new development, Build-Therm Services has the experience, wealth of knowledge and dedicated in-house and supply chain labour to ensure the right render/finish will be selected to create inspiring, functional and durable façades. Whether it is external wall insulation benefits are:
Provides protection against cracking surfaces

Suitable for application onto many surfaces incl. masonry and SFS

Enhanced algae and fungus resistance

Polymeric for enhanced water repellent and weather protection

Available in a wide range of colours

Vapour permeable for façade breathability

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