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Protective Coatings

5 Main Types Of Rendering Defects To Consider

types of rendering defects

Render is used across the UK to protect the brickwork on the exterior of a property. As the first line of defence for many homes agaisnt damage, seeing defects in your render can be a worrying sight.

Not all render defects spell diaster, but some can be a sign that there is something seriously wrong with the exterior of your home.

Spotting signs early is the key to putting in place a solution before the structure of your home is put at risk.

Five Main Types Of rendering Defects To Consider:

Rendering Defect No.1: Erosion Is Compromising the Render

The UK is in constant battle with the effect of erosion; particularly coastal erosion, with almost 7,000 buildings in the UK pegged to be sacrificed to the sea in the coming years.

Render erosion is on a much smaller scale, but it’s still a concern for some homeowners. Erosion of rendering means that that render is literally being washed away, leaving the external walls to fight the elements without protection.

Rendering Defect No.2: Cracks Have Appeared in the Render

Cracks are perhaps the most common rendering defect to affect homes in the UK. Cracks can range from cosmetic hairline cracks to much more severe cracks that can mean the external walls are in danger.

Even the smallest of cracks leaves room for water to start seeping into the brickwork, and possibly causing more damage to the render in cold weather when the water freezes.

types of rendering defects

Changing old render to new render can cause issues with render incompatibility. This is not as common as a problem as render cracks but can cause issues like water penetration and poor wall breathability.​​​​​​

Rendering Defect No.3: The Render Has Started to De-Bond

Render that hasn’t bonded with the surface or that has started to de-bond can cause big problems. In these cases, you may lose a large part of the render on your building, and the remaining render will likely be unstable.

Commonly, de-bonded render can be knocked away from exterior walls with relative ease. This leaves whole areas of the wall exposed to weather damage.

Rendering Defect No.4: The Material is Incompatible

Older properties were constructed very differently to modern properties. The differences range from the construction of solid walls instead of cavity walls to the type of render that was originally used.

Changing old render to new render can cause issues with render incompatibility. This is not as common as a problem as render cracks but can cause issues like water penetration and poor wall breathability.

types of rendering defects

Render defects don’t just appear overnight. If your render is looking worse for wear, then there are multiple, possible causes.

Rendering Defect No.5: Water Has Entered the Render

Whether through cracks or due to a poor quality of render, serious defects can arise if water is allowed to seep into the render of a property.

You may start to see visible damp patches on the exterior, your home may stop being as energy efficient, and existing cracks may start to get worse.

5 Common Causes of Render Defects

Render defects don’t just appear overnight. If your render is looking worse for wear, then there are multiple possible causes.

Here are a number of the common causes of render defects…

• An incorrect mixture ratio was used when the render was applied

• No movement allowance was given during install

• Water has been allowed behind the render and has frozen

• The material was incompatible or too weak

• An incorrect thickness was achieved during install

types of rendering defects

With a high-quality ProPERLA wall coating, water absorption will be reduced by almost 100%, without sacrificing the ever-important breathability of the masonry

Protect Your Walls For The Long-Term With The Help Of Home Logic

No matter what’s going on with your render, if there are defects, then they need to be fixed. This means that the render should be professionally inspected, and all areas of damaged render repaired.

Then, it’s crucial that you put measures in place to keep your render protected in the future. One of the best ways to do this is with a Home Logic wall coating – a product designed to protect render and brickwork from serious issues like water absorption.

During the application of a professional wall coating, your walls will be fully inspected, and any repairs will be completed. This includes the filling in of cracks, treatments for issues like algae, and bagging to help stabilise the walls.

With a high-quality ProPERLA wall coating, water absorption will be reduced by almost 100%, without sacrificing the ever-important breathability of the masonry.

There’s also the added benefit of a wall coating being self-cleaning, lowering your exterior wall maintenance even more.

A wall coating provides an extra layer of defence, keeping your walls and render protected for years to come. If you would like to enquire about wall coatings for your home, then please call our team on 0800 1700 636! Alternatively, simply click the button below to get the ball rolling today!