At EWI Pro, we specify many projects throughout the UK. They vary in size, scope, and system application. From large-scale commercial projects to small-scale residential, we cover every type of project. As we’ve discussed recently, we provide a comprehensive range of testing processes. These include wind-load tests, moisture testing, and pull-out tests. Our Technical Team also provides expert U-value calculations to ensure the system is suitable. In our new series of blogs, we will shine a light on specific projects and the build-ups they utilise.

Our newest case study displays the triumph of a commercial retrofit. EWI Pro’s products are not just designed for residential improvements. The pub in question, Oddfellows in Bradford, had been in a state of disrepair with peeling and cracked render. As such, our BDM Tyler visited the owners and recommended our most popular solution, EWI-075 Silicone Render. The project had a timeframe of just over a month, and being an external retrofit, it did not impact any of the business which is a huge bonus for the owners. The team from Rendacoat dedicated 6 installers to the project due to the size of the property to install a render-only system.

Project details

– Substrate: Existing Render
– U-Value change: N/A
– Basecoat: EWI-269 Lightweight Basecoat
– Finish: EWI-075 Silicone Render
– Colour: White
– Location: Bradford
– Installer: Rendacoat

The build-up

It begins with a thorough inspection of the existing render. Any damaged or loosely adhering areas must be removed, and the entire surface should be cleaned to eliminate dirt, grease, and biological growth, possibly involving power washing or using specific cleaning agents. This step is critical for ensuring the new materials adhere properly.

Following the cleaning, any surface defects in the existing render should be repaired using suitable fillers or repair mortars. Once the repairs are dry, a primer is applied to enhance the adhesion of the new basecoat to the old render, ensuring a stable foundation for the subsequent layers.

The next phase involves the careful mixing and application of the EWI-269 Lightweight Basecoat. This needs to be spread evenly, typically to a thickness of around 6-8 mm, following the manufacturer’s guidelines. After application, sufficient curing time, often a few days, must be allowed as per the product’s specifications.

The EWI Pro Fibreglass Mesh is then measured, cut, and embedded into the still-wet basecoat. This step requires meticulous attention to ensure the mesh lays flat and overlaps correctly, providing strength and preventing future cracking in the render system.

The EWI-075 Silicone Render is then prepared and applied over the basecoat. This layer, usually 1-3 mm thick, can be applied using a trowel or spray machine. While the render is still wet, the desired texture is created with appropriate tools, like a float, sponge, or trowel. The curing of this layer should be closely monitored, avoiding direct sunlight or very humid conditions that can affect the outcome. After the render has fully cured, a final inspection is conducted to identify any imperfections. Any necessary touch-ups are made to achieve a consistent and smooth finish.

Render for commercial properties