Why does render crack?

render plaster repair perth.png
render plaster repair perth (2).png

There are many reasons that your render can crack or lines can appear, and that is why it is very important to diagnose exactly why the render is cracking, before attempting any repairs.

Here are a few:

  • Some types of renders are more prone to crack than others, so it may depend on what type of render was used in the first instance. There are many types of render. Some older products, like sand cement render are very prone to cracking. Sand cement does not have the ability to cope with shrinkage, erosion or movement of the property over time. When the lime and cement are mixed, the cement is much harder than the original lime based render, which is more flexible.
  • It can also be due to the movement of your house. 
  • It could also be variance in the actual mix proportions of the original render. 
  • The original mix may have dried too fast in hot conditions.
  • Too much water in the mix.

The good news is that more recent products on the market have much more flexibility to offer, so that cracks will not develop, unless there is extensive moment in the building.

We can recommend a local Perth product, trademarked and patented here in Perth Western Australia, designed for our warm and dry conditions. The repair caulking guns are available at local Bunnings store. We use the refined version the product to coat walls and fill minor cracks. We use it on many projects because it has the advantage of durability, and handling expansion and contraction which prevents minor cracks from reappearing. It creates a quality surface, full cover, with colour options. This makes it a highly efficient process to repair and recover the area. 

Contact Us to find out more about how we can help you!