After an on-site assessment, we recommended a two-step approach: external wall insulation using EPS boards and a final finish using spray cork render.

Why EPS?

EPS, or Expanded Polystyrene, is one of the most effective and widely used materials for external wall insulation, and of course, for good reason. When it comes to improving a property's thermal envelope, EPS offers an excellent balance between performance, affordability, and ease of installation.

This lightweight insulation board is composed of tiny beads of polystyrene that are fused together, creating a closed-cell structure that traps air and significantly reduces heat transfer. It offers a highly efficient thermal barrier that keeps warmth inside during the winter and helps maintain a cooler indoor environment in the summer.

For this Bournemouth property, EPS was the ideal solution. It allowed us to create a seamless layer of insulation across the external walls without adding excessive weight or thickness to the structure. The boards can be easily cut and shaped on-site, which made it possible to accommodate the home’s bay windows and curved sections with precision.

Another key advantage of EPS is its longevity. Once installed and protected by a robust render system (such as our spray cork finish), it can last for decades without losing its insulating properties. It’s also moisture-resistant, which means it won't degrade due to damp or water ingress, a common concern in older or poorly rendered homes.

In terms of environmental impact, EPS insulation helps reduce overall energy consumption in the home, contributing to lower carbon emissions over time. While it’s a synthetic material, it’s also fully recyclable and widely reused in the construction and packaging industries.

Why Spray Cork?

Spray cork render is becoming more popular among homeowners looking for an alternative to traditional cement-based wall rendering solutions, and it’s easy to see why. This innovative material offers a unique combination of thermal insulation, weather resistance, aesthetic appeal, and, most importantly, flexibility and breathability.

One of the key advantages of spray cork is its natural elasticity. Unlike rigid render systems that can crack over time due to structural movement or changes in temperature, cork has an inherent ability to expand and contract in response to the building's movements. This flexibility makes it ideal for the UK’s coastal variable climate, where fluctuations in temperature and humidity can put pressure on exterior surfaces.

Whether it’s a hot summer day or a damp and wet autumn morning, spray cork adapts to the environment, minimising the risk of cracks and reducing the need for costly repairs down the line. Equally important is the spray cork’s breathability. A breathable render allows moisture vapour from inside the property to escape through the walls without letting water in from the outside.

This "moisture balancing" ability is crucial in preventing condensation build-up and maintaining a healthy living environment, especially in older homes where solid walls can trap humidity. By allowing walls to "breathe", spray cork helps protect against dampness and mould, contributing to better indoor air quality and long-term structural integrity.