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How to Protect Render From Harsh Weather Conditions

One of the biggest challenges for renderers is the UK weather, which is widely acknowledged. It can affect your home’s render in many ways. This article will explore how to protect the render from weather conditions and what you need to be aware of.

Cement reacts with water, activating a chemical setting process. This process can change in different temperatures, so it’s important to understand what can be done to prevent problems with your render.

Most render products must be applied between temperatures of 5°C and 30°C – applying under or over these temperatures risks unintentional damage as the render sets, such as cracking.

As a natural and porous material, render is susceptible to damage from moisture, temperature extremes, UV exposure, and other environmental factors.

However, there are steps you can take to protect your render and keep it looking its best, even in harsh or changing weather conditions.

protect render from weather conditions

How can the weather affect your render?

Moisture And Humidity

Excessive moisture poses a significant threat to render. Damp or humid conditions can foster the growth of mould, mildew, and algae on the render surface, particularly in warm or tropical climates.

To prevent the growth of moisture-related issues, it’s crucial to promptly dry any water-damaged areas of the render. Trapped moisture greatly increases the risk of such growth.

If mould, mildew, or algae do develop on the render due to moisture, clean the affected area using a mixture of bleach and water or a commercial mould/mildew remover. Thoroughly rinse the area when finished and allow it to dry completely.

For ongoing protection, apply a fungicidal render sealant, which helps prevent the growth of fungi, mould, and mildew. Re-application of the sealant is recommended periodically, especially after cleaning mould or mildew from the render.

Cold And Freezing Temperatures

During colder climates, the repeated freezing and thawing of render can cause it to crack or crumble. To protect from this damage, you can install insulation, such as house wrap, behind the render or apply a weather-resistant render sealant. This sealant helps to stabilize the render’s temperature and reduces the contraction and expansion that can lead to cracks.

If cracks do appear due to freezing, it is essential to repair them promptly using a render patching compound. Apply the patch when temperatures are above freezing and the render is dry to prevent the material from re-cracking.

Continuous exposure to heat and sun

Extended exposure to the sun can lead to the fading, chalking, and quicker deterioration of render. To shield render from sun damage, it is advisable to apply a UV-blocking render sealant. Look for a sealant containing silicone or acrylic, specially formulated for exterior render or masonry surfaces. Re-application of the sealant every few years will help maintain its UV protection.

Additionally, consider limiting direct sunlight exposure by installing roof overhangs, trellises, or other shading structures over the render.

Lighter-coloured renders containing titanium dioxide or other UV-resistant materials are generally more resistant to sun damage. Renders with smoother, more solid surfaces are also less prone to UV deterioration compared to highly porous renders.

For render already affected by sun damage, cleaning and re-sealing can help restore its appearance and safeguard it from further harm.

Seek help from professionals to protect render from harsh weather

By understanding how various weather conditions affect render and taking appropriate protective measures, you can preserve your home’s render for a longer period, maintaining its new-like appearance.

Regular maintenance, including cleaning, sealing, and adjusting moisture and ventilation, can help render withstand environmental conditions and retain its attractiveness for many years.

With proper care and protection, render can serve as a durable and appealing siding material, even in challenging or changing weather conditions.

Get in touch with our team to help protect your render from harsh weather conditions or if you need a complete overhaul of your existing render. Our team at Ralph Plastering can provide you with a free quotation.

Looking For Plasterers In South London or Surrey?

Ralph Plastering is a highly recommended plastering company in South London and Surrey providing all aspects of plastering, dry lining, rendering and external wall insulation services.

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