Rendering is a job similar to plastering. It is a job that requires plenty of practice, and a high degree of skill. As with many similar jobs, it is not advisable to do it on your own. People often ask how to render a wall, thinking they will do it themselves.
The process is very similar to plastering for internal walls. Rendering is pretty much the same job, just done on the external walls.
The role of rendering is to protect the covering structures of the building against impacts of the external environment. But if you want to know how to render a wall, you must educate yourself.
There are many other alternatives that are much better than rendering. Now, while you can try and save some money by doing the rendering yourself, we always recommend hiring a professional. But before we get there, let’s talk about the disadvantages of render…
Disadvantages of Render
There are two main types of rendering materials: sand and cement. Both come with their own set of problems, but generally speaking, sand and cement rendering both possess a number of flaws.
The first problem is structural. Sand, and cement in particular, is inflexible as a material, which means it is prone to cracking. When sand and cement are put under the pressure of performing under extreme types of weather, they crack.
The render cannot handle extremes of cold and heat The temperature changes will cause the render to expand and contract. The result of this phenomenon is the appearance of cracks on your walls.
These cracks will allow for water to get into the walls and your internal walls will suffer. The older your render is, the higher the chances of cracking. The end result is that due to cracks and moisture in the inside, you’ll notice big patches of moisture forming on your internal walls.
The second disadvantage is closely related to the first one. Because render cannot handle extreme temperatures, you will notice fallen parts of render. And they do not look good.
The problem is, you cannot just fill those cracks and holes with render. You have to re-render the entire house. That means that maintenance of render is expensive.
Render reduces the ability of the building to get rid of an excess build up of moisture. Note: this applies only for buildings without a cavity wall. If you have a cavity wall, the problem can be solved easily.
However, if you do not have a cavity wall, the render will vastly reduce the ability of your building to circulate the moisture effectively.
Last, but not least, let’s talk about the decorative aspect. Because of all the problems stated above, yellow water stains will appear on the render. These water stains across the façade look unattractive, decreasing the overall appeal of your property’s exterior.