Render can create a beautiful Finnish for your home if done in the right conditions, but what if it isn’t, and what are those tiny holes ruining your texture?

We have a lot of people coming to us with complaints regarding how their render has dried. The complaints commonly include things like pin holes and the product drying too quickly. This is mostly caused by applying the render in the wrong weather conditions or in direct sunlight, as the product has specific temperature margins where the product will work at its best. The temperature margins tend to be around 5˚C – 25˚C but each render may vary so you should always check your product packaging to determine its specific temperature requirements.

This shows that it is not a problem with the quality of the product but through applying the product in inadequate conditions. Pin holes can happen from time to time but there is normally a reason for this, so it is important to follow the correct application techniques to reduce the chances as much as possible.

One contributor to pin holes in hot weather conditions may be not applying a render primerBase-coat is very dry and porous so will suck the moisture from the render very quickly which will massively increase the risk of getting pin holes. The render primer will help prevent this by creating a barrier between the render and base-coat preventing this from occurring.

One of the main causes of pin holes in hot weather conditions is due to the product drying too quickly, so by not applying a primer you are exacerbating this problem. A way to reduce this problem further is by applying two coats of primer instead of just one, because this will create a stronger barrier between the render and the base-coat, further preventing the base-coat from sucking the moisture from the render.

Pin holes are unsightly but are not the only aesthetic problems that may occur as a result of applying the render in poor weather conditions. The render will naturally dry much quicker in hotter temperatures and in direct sunlight, which may reduce the amount of time you have to correctly apply the product, which may lead to an unfinished or uneven texture.

It takes 4 men around 3 hours to render 200 square meters. By not having enough time to apply the render you may not be able to apply it using the correct technique so may result in a render with lines, and although there won’t be any real discolouration these lines and uneven textured finish can create the appearance of discolouration. The correct way to apply the render is in circular motions rather than in strips, because this will help create that uniform and smooth texture you are aiming to achieve.

The best way to reduce the chances, is of course, to apply the render in the correct temperatures. But, what do you do if you are in the middle of summer? The solution is to get up early and get going! We have many installers who will start the process at 5 in the morning, so they can get started before the sun is at its hottest! you should avoid applying the render in the middle of the day because this is when the sun is harshest.

Another technique, which may seem a little bizarre at first, is to work by avoiding the sun. What I mean by this is to follow the shadows and apply render on these sections, and 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 in the shadows and staying away from the glaring sun.

Do these problems affect different render types?

Yes, pin holes are a problem that can affect most types of render, this is a problem in silicone render, thin coat renders and acrylic render of all grain sizes. This means switching to a different product may not be an ideal solution, as not only will you still have the chance of getting pin holes, but you may not get the aesthetic look you were going for, because some renders look very different from each other. Another reason this is not an ideal solution is because you will not gain all the amazing other benefits that for example, a silicone render would provide you with. This means the only real solution to this problem is to be conscious of weather during application and using the above techniques to help minimise the chances of pin holes occurring.

If you are interested in Learning the correct process for applying render then consider attending one of our courses or watching 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 pin holes, the problems are purely visual and there are so many advantages to rendering your property. Please check out our blog on ‘The Benefits of Using Silicone Render’.