Signs That Your Render Needs Replacing

No matter how good your render looks when it is first applied, or how well you take care of it, there will come a time when you can’t just clean it and hope it returns to looking brand new.

Outdoor render is constantly exposed to the elements and pollution, and it is inevitable that, over time, you will notice signs that it is looking the worse for wear and will probably need to be fully replaced.

If you notice surface damage or wear and tear and decide to ignore it, the higher the chance of structural damage occurring.

Continue reading to learn about the key signs to look out for to show that your render needs replacing and whether your render needs a simple repair job or a full replacement.

Key Signs That Your Render Needs Replacing

Large Cracks​

It is normal for small hairline cracks to appear on rendered walls as the render moves with a shifting building. However, if a crack is big or spreading along your wall, it is definitely a cause for concern. Another warning sign is the sudden appearance of cracks after a period of rain.

What does this indicate? Structural damage, moisture ingress or the render mixture falling apart. Cracks in the render increase the likelihood of water entering the structure, accelerating the rate of damage.

Loose Or Hollow Sections of Render​

To find out whether your render is hollow, walk along the perimeter of your home and tap along the wall with your fist or a solid object. Solid render that is still bonded to the substrate will produce a sharp sound, whereas loose or hollow sections of render will make a dull sound.​

What does this indicate? The render is no longer securely bonded to the substrate, putting it at risk of falling away from the structure completely. Moisture can enter the substrate behind the loose render, causing ongoing damage to the structure.​

Peeling Or Bubbling Render

Peeling or bubbling render can’t be repaired or re-rendered and is a sign of moisture entering the render, breaking down the bond between the substrate and the render.

What does this indicate? It indicates that moisture has been trapped in your structure for a long time, leading to damage to the render.​

Damp or Moisture Patches​

If you notice dark water or moisture patches on your render that won’t go away even on sunny, hot days, or wet patches on your internal walls, it means the render has lost its water-resistance. Additional signs include a musty smell that is always present in the home.​

What does this indicate? Water is seeping through your render and entering the structure beneath, posing a high risk of structural damage and mould growth.​

Efflorescence (Salt Damage)​

Efflorescence presents itself as a chalky white residue that appears on brick or rendered surfaces. It occurs after moisture enters the structure, picking up salts from the render mix and the substrate.

It’s important to note that not all cases of efflorescence are a sign of serious damage. In some cases, it appears lightly and disappears again when the rain stops.​

What does it indicate? It indicates that water is moving through the render, and if the efflorescence is persistent, it is a sign of moisture build-up that won’t dissipate on its own.​

Render That is 20+ Years Old​

If you have a render that is over a certain age, it has likely seen better days, even if it has been well-maintained over the years. To avoid structural damage and give your home a makeover, it may be time to say goodbye to your old render and hello to a fresh coat. If you’re not sure about the lifespan of your render, it’s time to call the professionals! Sydney Cement Rendering can determine the age of your render and let you know when it should be replaced.

What does it indicate? An old render will not hold up as well to the elements and may become an eyesore. To save money on costly structural repairs, it might be time to think about a new render.​

Discolouration and Staining​

It is normal for your render to become stained over the years due to exposure to the elements. In many cases, those stains and discolouration can be repaired, removed or painted over. However, when you notice more of these stains spreading across the render and recurring quickly, even after you clean them, it’s a sign of something more serious.​

What does it indicate? Different-coloured stains indicate the type of stain and whether it can be cleaned. Green or black stains are usually an indication of fungal growth and exposure to pollution, while reddish and orange stains are caused by rust.​

Recurring, widespread stains can indicate that the render is no longer protecting the structure from the elements and may need to be replaced.​

Repairs That Keep Failing

If you have repaired the render before, particularly with patches, but those patches keep popping off or coming undone, it’s likely a sign that more serious problems need to be addressed.​

What does it indicate? That spot-fixing is no longer an effective approach, and you will save money and time by replacing the whole thing.​

Should You Repair Or Replace the Render?​

Should you repair or replace your render? Please note that before making a final decision, we recommend that you call a professional renderer who can help you make an informed decision about the right steps to take. You can be assured that they will always give you honest advice.​

Tips for Inspecting Your Render​

Here are some ways you can inspect your render:​

• Check the entire structure: Walk around the perimeter of your home and inspect the walls. Do you notice any cracks, wet patches or stains?
• Tap test: Tap on the surface with a fist or a hard object to find any hollow or loose areas of render. Mark any hollow areas you find with some chalk.
• Check the base of your walls: The lower part of your walls is exposed to splashback from rain and muddy grounds, and is often where the first signs of render damage begin.
• Check your internal walls: Sometimes the render damage shows up in your home. Can you see any damp patches or peeling paint?

Mistakes to Avoid

Ignoring the Damage​

Have you noticed your damaged render, but keep putting off the repairs or calling the professionals for a second opinion? This can result in more extensive damage and much more of your money being spent on replacing the render.​

Painting Over Holes and Cracks​

Do you paint over the holes and cracks you notice without fixing them? This is like applying a Band-Aid to a gaping wound. Soon enough, the patch job will not be able to contain the structural damage that has been done.​

Ignoring Damp Patches On Internal Walls​

Wet patches on your internal walls are often an indicator that your render is failing to protect your home from the elements.

Choosing a Cheap Re-Render Job​

Do you choose the cheapest quote and renderer without doing the proper research? We understand that re-rendering your home may not have been something you planned for or necessarily want, but it is best to do your research and hire a reputable company, so your new render can last for years to come.

At Sydney Cement Rendering, we take pride in being Sydney’s trusted rendering experts. From residential jobs to large-scale commercial projects, we provide our customers with the highest-quality rendering services and adapt to every situation and rendering style. To learn more about re-rendering your property and to get an accurate quote, give us a call at 0402 704 984 or visit our website  https://sydneycementrendering.com/ to find out more about the services we offer!​

FAQs​

How Do I Know if My Render Needs Replacing Or Just Repairing?

If the damage is small and isolated, like one or two hairline cracks with no sign of moisture damage, a patch repair may be all you need. But widespread cracking, hollow sections across large areas, or persistent damp patches usually mean the render is damaged on a deeper level, and full re-rendering will save you money and time in the long run.

How Long Does Render Last Before it Needs Replacing?

It depends on various factors, including the type of render you use, the area you live in, how well you maintain it, the quality of the render application and the preparation of the wall.

Can You Render Over Old Render?

It depends on the condition of the existing render, but we don’t recommend it, as the render is more likely to fail and not bond well with the substrate.

Is it worth re-rendering an older Sydney home?

Almost always, yes. Re-rendering restores your home’s weather protection, prevents water damage to the structure, and significantly improves the property’s look and street appeal.

Does Render Damage Get Worse Over Time?

Definitely! Cracks allow water in, which makes the render more hollow and can damage the building’s structure. Trapped moisture also encourages mould growth and can cause long-term structural issues. Acting early is always more cost-effective than waiting.