What happens if you apply too many coats of render?
Rendering the external walls of your property has many benefits, including providing your home with better curb appeal and possibly even increasing its value. 

From a practical level, rendering the external walls has the sole purpose of protecting the bricks or blocks used to construct the building from the elements. 

Render is a combination of sand and cement, a lime-based mixture or a resin-based coloured render, which is generally applied by a plasterer to the external surface of the wall. 

When dry, an additional layer of weatherproof wall coating or paint can then be applied which, in turn, will protect the render from cracking. 

It may cross your mind that, in order to have extra protection and a more long-lasting finish, therefore protecting your brickwork for longer, you should add another layer of render. 

Don’t fall into this trap.

Adding too many layers of render to the external walls of your home can have completely the opposite effect. 

Although each individual layer of render does not carry much weight, once three or four coats are applied it is unable to support its own weight on a vertical wall. 

This will lead to render cracking, which will enable water to get in. In the winter this will freeze, subsequently making the cracks bigger.

Eventually, the render will start falling off the wall in great chunks. 

There is no way to repair this other than removing the render and re-doing the wall. That one extra layer of render can be a very costly mistake to make. 

Here at Amaroc we have a wide range of rendering materials and tools to help you protect your home effectively, as well as an experienced and helpful team who are always happy to offer advice. 
September 24, 2019 by Amaroc Collaborator