Frequently Asked Questions

What is rendering?

Rendering is the process of coating exterior or interior surfaces with a layer of cement-based, acrylic-modified mixture. Rendering is essential for all construction jobs, as it straightens the wall and gives a flat finish, ready for a texture or paint.

Rendering work shields construction materials from detrimental exposure and erosion, reducing the likelihood of costly maintenance and repairs in the long term.
To become a renderer requires a four year apprenticeship, so to pick up a hawk and trowel and attempt it yourself may be a challenge. However, there are products on the market, such as Concote (an acrylic bagging system), which make it easier for home renovators to do it themselves.

Does rendering improve insulation?

Yes. Rendering prevents moisture from seeping into the wall, creating an extra layer of insulation. This helps your building’s interior to remain comfortable and dry, no matter the weather.

How do I make render waterproof?

You can prevent moisture damage by applying a waterproof coating before you render.

For instance, Drizoro MAXSEAL® is a waterproof coating suitable for application on a range of mortar substrates. Creating a seal to positive and negative water pressure, it protects against the elements and cycles of freezing and thawing.

Can I render over wood?

We do not recommend rendering directly over wood, weatherboard, plywood or similar materials.

If you decide to render over wood, it’s important to ensure this surface has been prepared correctly. You will need to add a breather membrane for ventilation atop the wood, followed by a render substrate. These layers will prevent moisture from warping the wood after your rendering work has been completed.

Can I render concrete sleepers?

Yes, it is possible to render concrete sleepers. Many rendering products are suitable for cement surfaces, often working best if applied as a thin layer.

How do I fix cracks in rendered walls?

There are several ways to fix cracks in rendered walls, including filling in damaged areas only, applying a fresh coat of render to the entire wall or completely removing and reapplying the render.

The right solution depends on the degree of cracking in your rendered wall. If you only have a few cracks, spot repairing may be the most efficient option. Note that this can require corner bead replacement and mesh installation. On the other hand, re-rendering your wall may be a more suitable route if your existing render has various cracks throughout.

For tailored advice on repairing your rendered wall, contact the Render Texture Panel team today on 02 9896 8111.

Can I sand a rendered wall?

Yes, you can sand a rendered wall. We recommend using sandpaper with 120 grit or above. The higher this value, the finer the sandpaper, allowing it to gently even out your rendered surface.

Can I paint over acrylic render?

Yes, you can paint over acrylic render. What’s more, you may not even need to apply a second coat because we can tint your render to match your paint colour if requested.

Paint will add an extra layer of style and protection to your rendered wall. However, you’ll need to follow the correct steps and use the right paint to ensure a quality result.

What is the best paint for rendered walls?

The best paint for rendered walls depends on several factors, from the specific rendering materials used and how they were applied to where your wall is located. You must make sure that whichever paint you choose to use is suitable for rendered walls, as many will peel and flake off if not compatible.

ROCKCOTE Armour paint is a popular paint choice for rendered walls. This highly flexible, water-resistant acrylic membrane paint is suitable for application using a spray gun, roller or brush. As well as leaving no paint fumes, it provides high-performance protection against the Australian climate. Before you paint exterior site-mix cement rendered walls, make sure to apply ROCKCOTE AE Primer first to prevent efflorescence.

For more information, contact our team today or explore our full range of paint products.

How long do I have to wait before painting new render walls?

Curing time for traditional sand and cement renders is 28 days, whereas acrylic renders have a curing time of just 48 hours. This can be a huge cost saver, particularly if scaffolding is involved. If you do not wait for the render to cure before getting started, the paint can trap moisture within the render, in turn leading to cracks in your new wall and bubbles in your paint.

How do I paint a rendered wall?

Whether you’re painting an interior or exterior rendered wall, preparation is paramount. For a successful paint job, we recommend following the below steps:

  • Make sure the render is cured before beginning your painting project.
  • Apply a sealant to any cracks in your render or gaps surrounding fixtures, doors or windows.
  • Once all of the render has fully dried, assess whether your wall is even. Sand down the render if required to create a smooth surface.
  • Clean the wall with a brush and damp cloth to remove any excess render, dust and dirt. Leave the wall to dry.
  • Apply primer, also referred to as stabilising solution, to the surface of your wall before you paint it. This will help your paint to adhere to the rendered surface. Give this primer time to set.
  • Start painting. Stir inside the paint can after opening it for as long as you can so that the paint doesn’t become thick. Then, start applying the paint slowly on the render.
  • Once you’ve completed your first layer of paint, allow it to set on the render for a minimum of two hours before adding a second coat.

How often should I paint a rendered house?

In general, a rendered house will need to be painted every five to ten years. This duration varies according to factors like your location, climate and previous paint work.

As there is no one-size-fits-all timeline, please feel free to get in touch with our expert team today for a tailored estimate of when you will need to repaint your home.

How do I clean a textured wall?

To clean a textured wall, use a vacuum brush to remove any dust or dirt from its surface. Afterwards, wipe the wall lightly with a cloth doused in warm soapy water to lift any remaining dirt. Then simply leave it to dry.

Note that as a textured wall has a rough surface, it may cause a sponge to rip and tear, leaving its remnants in the wall’s indents.

How can I colour match paint?

There are multiple ways to colour match paint. Whether you use a swatch of fabric, spool of thread or photo of your desired colour (taken in natural light), this sample will help you to source the most similar shade of paint.

If you are trying to find a paint colour to match your rendered wall, you can even use a utility blade to chip off a small piece of drummy render. From there, simply take your colour reference to our Tempe, Prestons or Northmead showroom.

Our experienced colour specialists are able to match almost any hue, offering tinting services with state-of-the-art equipment. All you have to do is supply us with a sample of your desired shade or the brand and colour name.