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Choosing the Right External Render: What Installers Need to Consider

Updated: Feb 14

As professionals in the rendering field, installers understand that selecting an external render is far more than a surface-level decision. The choice of render significantly impacts a building's aesthetics, structural durability and overall performance. In this guide, we go into the considerations that renderers must keep in mind when making this crucial choice.

Types of External Render

Silicone Renders

Silicone renders stand at the forefront of modern rendering solutions, offering unmatched advantages that set them apart from traditional options. Renowned for their exceptional water-repellent properties, silicone renders provide an impervious shield against rain and moisture, ensuring the long-term protection of the underlying structure. Moreover, they exhibit excellent resistance to the growth of algae and fungi, ensuring that the rendered surface stays pristine and aesthetically pleasing for extended periods. Installers seeking the pinnacle of weather resistance and low maintenance consistently turn to silicone renders. The Facade Hub proudly offers a comprehensive range of high-quality silicone renders in a variety of textures and colours.

Acrylic Renders

Acrylic renders represent another popular choice. Similar to silicone renders, they come in diverse textures and colours, offering installers ample creative freedom to achieve the desired aesthetic. These renders strike a good balance between affordability and durability, making them well-suited for various projects. The main difference between acrylic and silicone renders is within the price bracket and the performance. Acrylic renders wouldn’t be the ideal option for houses or buildings in urban or coastal areas since they can pick up atmospheric loads more easily than silicone renders.

Lime and Cement-Based Renders

Lime and cement-based renders, while respected for their historical significance, present limitations that make them less appealing for modern construction and renovation projects. These renders, while robust, may lack the flexibility needed to withstand structural movements, potentially leading to cracks and blemishes. Their moisture management capabilities are also comparatively modest, which may not align with the demands of contemporary building standards. While lime and cement-based renders remain viable choices for certain applications, their limitations make them less favoured among renderers seeking superior, all-around performance.

Monocouche Renders

Monocouche renders offer a single-layer application, which makes them quicker to apply compared to other renders. They adhere to most surfaces and can achieve a variety of finishes. Although monocouche renders are weather-resistant, they have less water-resistant properties than silicone-based products. Monocouche also absorbs dirt and grime more easily so requires more maintenance.

Specialised Renders

In the world of external rendering, innovation is constant. Specialised renders have emerged offering unique benefits that cater to specific project requirements.

  • Nanotech Renders: Nanotechnology has made its way into the construction industry, leading to the development of nanotech renders. These renders leverage nanomaterials to create an ultra-smooth and highly durable finish. Their microscopic particles fill imperfections in the substrate, resulting in an impeccably even surface. Nanotech renders also exhibit excellent resistance to moisture, fungi and pollutants, making them an excellent choice for urban environments.

  • Heat-Reflective Renders: These renders offer more than just thermal benefits. By incorporating advanced additives that reflect a substantial portion of the solar heat away from buildings, they allow for the application of deep intense exterior colours that remain vibrant for years, thanks to their heat-reflective technology.

  • Winter Formula Renders: In the winter months when temperatures drop significantly, the choice of render can significantly impact a building's performance. Winter formula renders are engineered to withstand temperatures between + 1°C to +15°C. They remain pliable in cold conditions, ensuring a secure bond and crack resistance.

Black modern building JUB Trend external render

Performance and Durability

One of the primary considerations when selecting an external render is its performance and durability. The chosen render should withstand the elements, resist cracking and maintain its appearance over time. The environment and location of your project can significantly affect the choice of external render. For instance, if you're working in a coastal area where buildings are exposed to salty sea air, a highly durable and water-resistant render is essential. The Facade Hub offers specialised renders designed to withstand such harsh environments, ensuring your project remains structurally sound and visually appealing.

Texture and Aesthetics Matter

In addition to their functional attributes, external renders significantly impact a building's visual appeal. The texture and aesthetics of the render should align with the project's design objectives. Our portfolio of external renders offers a wide spectrum of textures and finishes, enabling you to achieve your desired look.

For instance, you can choose a smooth, contemporary finish or opt for a more textured, traditional appearance. Examples include fine scraped finishes for a modern aesthetic or roughcast finishes for a more traditional appeal.

Modern house with external render

Compatibility and Mixing

Ensure that the selected render is compatible with the substrate you're working on. Different renders are formulated for various surfaces, such as brick, concrete or insulation boards. Our team is here to offer professional advice on compatibility and the correct mixing procedures to guarantee optimal results.

Longevity and Maintenance

Consider the longevity and maintenance requirements of the chosen render. Silicone and acrylic renders are renowned for their durability and resistance to cracking, fading and biological growth. This means fewer maintenance demands over time, translating to cost savings and less disruption for building occupants.

Local Building Regulations

Always adhere to local building regulations and standards when selecting an external render. The Facade Hub's team is well-versed in these regulations and can provide guidance on choosing a render that complies with local requirements, ensuring a hassle-free project from start to finish.

Selecting the ideal external render for your projects involves a multifaceted evaluation that goes beyond aesthetics. Factors such as durability, texture, maintenance and compliance with regulations must all be considered. The Facade Hub is your trusted partner in navigating these decisions, offering a wide range of premium external renders designed to meet the diverse needs of renderers.


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