As we approach the summer months, you might be wondering whether the hotter weather may impede your plans to apply render to your property – and rightly so. If applied in the right conditions, render can drastically improve the aesthetics of your home but, if applied in the wrong conditions, the aesthetic may not appear as you’d hoped. Read on to learn when and how you should apply render to your home.

In the past, we’ve received several complaints from homeowners regarding how their render has dried; the most common including the appearance of pinholes and drying faster than expected. Issues like these can be the result of the render being applied in too hot weather conditions or direct sunlight as the product has specific temperature margins within which the product will work at its best. The temperature margins tend to be around 5˚C – 25˚C, but each render’s margins may vary, so you should always check your product packaging to determine its specific temperature requirements.

These issues, then, do not reflect the quality of the products but the fact that they were applied in inadequate conditions. Although pinholes may occur over time, there is normally a reason for their occurrence. For instance, if a render primer has not been applied, especially in warmer weather, the likelihood of pinholes increases. As the basecoat is very dry and porous, it will absorb the moisture from the render very quickly, thereby massively increasing the risk of pinholes. Render primer, however, prevents this from happening by creating a barrier between the render and basecoat.

Another reason why pinholes might occur is due to the product drying too quickly. And, again, if a render primer has not been applied, this only exacerbates the problem. To avoid this, apply two coats of the render primer; this creates a stronger barrier between the basecoat and the render, further preventing the basecoat from absorbing the moisture.

Pinholes can affect most types of render – including silicone render, acrylic render and other thin-coat renders – however, switching to a different product based on this risk alone is not the ideal solution. Not only are pinholes a risk in any type of render, but you may not achieve the aesthetic look you were going for because some renders look very different from each other. What’s more, you will be deprived of all the amazing benefits renders have to offer; for example, a silicone render is extremely flexible, breathable and hydrophobic, unlike many other renders.

Although pinholes are unsightly, they are not the only aesthetic problems that may occur as a result of applying render in poor weather conditions. As the render, naturally, would dry much faster in hotter temperatures and direct sunlight than it would in normal temperatures, this would reduce the amount of time to correctly apply the product; this may lead to an unfinished or uneven texture.

It takes four men around three hours to apply 200 square meters of render. By not having enough time to apply the render, you may not be able to use the correct technique; this may result in an uneven textured finish which, in turn, can create the appearance of discolouration. The correct way to apply the render is in circular motions rather than in strips; this will help create that smooth, uniform texture that you envisioned your render to appear like.

The best way to reduce any of the issues mentioned is, of course, to apply the render in the correct temperatures and use the above techniques to help minimise the chances of pinholes occurring.

If you plan to complete your project in the middle of summer, the key is to get up early and get going! We have many installers who will start the process as bright and early as 5 am – it might not sound ideal, but it will be worth it in the long run. If possible, avoid applying render in the middle of the day as this is when the sun is at its hottest. Another technique – which may seem a little bizarre at first – is to work by avoiding the sun. What we mean by this is to follow the shadows and apply the render on the shadowed areas; as the angle of the sun changes, these shadows will move and so should you! This means you can keep applying your render while staying away from the glaring sun.

If you are interested in learning the correct process for applying render, you can enquire about attending one of our market-leading training courses or watch our YouTube video ‘Applying Silicone Render In Hot Weather’.

Don’t let these small risks put you off. There are no long-term side effects or damage to your property that can occur with pinholes; the problem is purely visual. If you can avoid pinholes by following the advice of this blog, you will notice all the wonderful advantages to rendering your property. Check out our blog The Benefits of Using Silicone Render to learn more.

If you have any questions, our Sales Team will be happy to help! You can find our contact details here.