Understanding How Light Affects the Colour of a Rendered Wall

Rendering is a construction process that involves applying a mixture of sand, cement and water onto the exterior of walls or other surfaces. It can be used to provide a protective layer, insulate internal temperatures and create a smoother finish, as well as improve aesthetic value by providing decoration through colouring.

This article will focus on how lighting affects the colour of rendered walls by exploring two key ways light influences render: direct sunlight exposure and artificial lighting in interior spaces.

lighting on a rendered wall

Direct Sunlight Exposure

When rendering with pigment-based products like paint or render tint, the amount of pigmentation determines how much light is absorbed or reflected off the surface. Therefore, when exposed to direct sunlight over time, the colour of these rendered walls may change due to fading.

A number of factors can affect how quickly this happens, including the type of pigment used (eg. organic or inorganic), the saturation level, and even local weather conditions like humidity and temperature.

The best way to avoid colour fade from direct sunlight is to opt for a high-quality render tint with good UV protection, which will block out more light than standard options and minimise any colour changes over time. Additionally, rendering an area that receives less direct sunlight exposure throughout day can also help reduce the chances of fading.


Artificial Lighting in Interiors

In addition to direct sunlight exposure, artificial lighting can also have an impact on rendered walls in interior spaces. This is because the colour of a rendered wall can look different depending on the type and intensity of light used, as well as the environment in which it is placed.

For example, fluorescent lighting can give off a cooler tone that appears slightly bluish or purplish in hue, whereas incandescent lights produce warmer tones that appear more yellow. Therefore, if you are looking for consistent colouring in an interior space with artificial lighting, it’s important to consider both the tone and intensity of light being used.

Additionally, walls close to windows may be affected by sunlight coming through the glass at different times during the day or night – this too should be taken into account when selecting paint or render tint colours.



Light plays a big role in determining how the colour of a rendered wall looks, from direct exposure to sunlight to the type and intensity of artificial lighting used in an interior space. To avoid colour fading from direct sunlight, opt for a high-quality render tint with good UV protection.

When working with artificial lighting, consider both the tone and intensity of light as well as any potential sunlight coming through windows that may affect colouring at different times during the day or night. With this knowledge, you can create stunning interiors with consistent colours that last over time!


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