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  • JM & MJ Solid Plastering

The Dreaded Render Repairs...

Often we receive calls about render repair work, this leads to us often having to break the bad news that the repairs are significantly more than anticipated. This is then followed by the questions, what caused the damage, what needs to be done, and how can we prevent this? So let’s address them.

What causes render damage?

There are a number of factors that cause damage to a rendered surface, these include:

- Movement, sometimes in the walls other times in the foundations.

- Incorrect curing times. All products have curing times meaning they must be left to ensure they dry correctly before applying another coat. There are unfortunately some trades who approach jobs with a quantity over quality vision and therefore do coat after coat without allowing the products to cure in order to get the work done quicker.

- Incorrect products used. Again, unfortunately some trades don’t follow the systems guide provided by their suppliers. They may skip a coat, or use the wrong products which then causes issues at a later date. This is why Jordan has taken such a vested interest to learn about the products available and consistently uses the same supplier.

- Weather. This is a big one that people don’t always consider. The weather on the days the work is undertaken impacts the process required and curing times.

- Moisture in the walls. This could be due to water leaks in plumbing; incorrect product sealing which then allows water to soak into the substrates; or weep holes being covered over.

What is the process of fixing the work?

Upon these phone calls or emails we will organise a site visit.


At the site visit Jordan will undertake an assessment of the damage which includes a moisture check and a check for loose and crummy render. From this he is able to establish the cause of the render damage in your situation. Once this is done, we work closely with our suppliers to establish the best way moving forward with regards to what products and processes we use.


Some repairs are simple patch works, other repairs unfortunately require the render to be taken off the walls and then reapplied with any substrate damage being fixed in the process.


What can I do to prevent the damage?

The biggest recommendation we can offer is use qualified trades with relevant licensing. Don’t be afraid to ask to view QBCC licenses, or certifications. Ask what products are used and if a systems guide from suppliers is adhered to. Also check what warranties both the company and suppliers offer on their work and products.