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One of the most significant impacts on external rendering is the weather. Like any other outdoor construction project, rain, heat, or cold can wreak havoc on your rendering project. Climate change is currently causing more extreme weather conditions, which all need to be considered before beginning to render your home.

Continue reading to find out how the weather affects the render and what the best conditions are for your rendering project.

Cold Weather/Winter Months

Applying render during the winter months means it runs the risk of being unable to dry fast enough. The render may retain moisture, which can cause damage over time. The render can also be at higher risk of developing lime bloom, which is a thin white film on the surface that looks unsightly. The process of cooling and thawing can result in small cracks forming in the render’s surface.

Occasionally, rendering during the colder temperatures can be beneficial as it results in a slower setting time, which can strengthen the render. However, this result isn’t always guaranteed.

Hot Weather/Summer Months

Although not as damaging to the render as the colder months, the heat and UV rays can impact the brightness of the render and weaken the pigments. In some cases, the paint can start to flake off.

The heat can also cause the render to dry too quickly, resulting in cracking and a patchy finish.

Rainy Weather

Rendering in rainy weather can affect the colour and texture consistency of the finish. Heavy rain can also cause issues with the bonding process between layers.

Wind

Wind can cause the render to dry extra quickly, resulting in a cracked or damaged render or a patchy finish.

Humidity and Moisture

Moisture and humidity are other weather factors that can be harmful to render. It can cause algae, mould and mildew on the render surface.

Best Weather Conditions

The best weather conditions to apply render include:

  • Not too hot: Make sure the temperature is below 30 degrees Celsius.
  • Not too cold: Make sure it’s warmer than 5 degrees Celsius.
  • Not too windy: Make sure it’s not too windy. A slight breeze is okay.

Factors to Consider

  • Sun exposure: Sun exposure over time can lead to the render fading.
  • Sealant: Applying a sealant containing acyclic or silicone protects the render from the UV rays.
  • Light-coloured renders: Light-coloured renders are more resistant to sun exposure and damage.
  • Mould, algae, and mildew: If algae, mould, or mildew form on the render surface, clean it with a mould remover or bleach and water.
  • Wet render: If the render gets wet, dry it as soon as possible to avoid moisture getting trapped.

If you need more advice about applying render during different weather conditions, please feel free to reach out to us.

We take pride in being Sydney’s trusted rendering experts and providing our customers with the highest quality rendering services. Contact us at 0402 704 984 or visit our website: https://sydneycementrendering.com/ to find out more about what we offer!