Exploring Rough-Cast Render: Origins, Durability & Maintenance

Rough-cast is a type of cement render that can be applied to external walls of properties. In its heyday, it was a popular choice in the UK but now, there are modern alternatives that can provide better protection, functionality and aesthetics. Here, learn all about rough-cast and if you already have it on your property, find out how to maintain it.

Why Has Rough-Cast Experienced So Much Popularity?

Rough-cast has long been a popular option in places such as Scotland where weather can be harsh and properties need additional protection. It uses jagged-edged stones to create its distinctive appearance, which has both functional and aesthetic benefits. Functionally, it provides an extra layer of protection to brickwork. Aesthetically, the outer layer effectively shields the brickwork and can create a finish that is more aesthetically pleasing. However, this has also allowed builders to use lower-cost bricks, benefiting them but not necessarily benefiting the property. Rough-cast might be disguising some issues that are only discovered upon further investigation.

Rough-Cast Durability

While rough-cast can be a durable option, it presents problems over time. After years of exposure, rough-cast render might develop cracks, bossing and moisture stains from rainwater exposure. It can also become stained by carbon deposits from the air. At this stage, rough-cast will need to be maintained or replaced in order to protect the property.

Maintenance Options for Rough-Cast

1. Spot repairs. An exterior plasterer will be able to inspect the render and complete spot repairs on any areas that are showing signs of wear and tear. Remember though, this method of rough-cast maintenance can work out more expensive in the long run. It can also affect the appearance of the property and make it look patchy.
2. Rough-cast renewal. This involves the application of a new layer of rough-cast render, refreshing the external appearance. However, this can compromise the property over time as it adds significant weight – an entire gable end might require up to two tons of wet render! It is also difficult to create a consistent appearance when applying new rough-cast, and factors like the weather and humidity levels can affect the quality.
3. Wall refurbishment. If it’s time to move away from rough-cast and its pitfalls, the wall refurbishment process is one that will work very well. Repairs are carried out first, then a lightweight, breathable coating is applied in the colour of your choice. This will be guaranteed for 15 years when you choose us to apply it.