Painting an exterior wall is an important factor for any house because not only it gives a curb appeal, but it also gives a good protection to the house. But, whenever the problem occurs, it can be a nightmare, but don’t worry, I’m going to give you the best available solution for the 4 most common problems.
Always Remember: Preparation is The Key!
When you’re decorating exterior walls it is of utmost importance that you plan and thoroughly prepare your project. This will make sure that you get the best results. However, always make sure that you’re using the right products and tools for the job as it will make your job easier and will result in better finish results. Remember that primary goal of painting your exterior walls is for protection and decoration. And, to accomplish the best results, consider exterior wall coatings by wallandroofcoating.co.uk that provides protection by creating a barrier against moisture and UV rays that can damage the wall surfaces and the structure itself.
However, if the problem still occurs, then take a look at the following most common problems and how to fix them.
Problem: 1 – Mouldy Brickwork
Cause: Mould on walls is usually caused by penetrating damp that is getting into exterior walls. And, if it’s not treated or removed, then its growth can reoccur regardless of good quality decoration.
Solution: If your exterior walls have problems with mould, then treat them with fungicidal wash. I also recommend applying Valtti mould removal solution. Once it passes the sufficient drying time, apply masonry paint.
Problem: 2 – Efflorescence
Cause: Fresh stonework or brickwork must be left three months before applying any treatments. And, during these three months, a white powdery substance may seep out from bricks or cement. This is due to water dissolving the salts which is found within all these materials.
So, if efflorescence is found on old brick works, then it’s the sign of excessive moisture and the source of damp must be found to get treated.
Solution: Clean the efflorescence with a bristle brush and coat the area with weatherproof exterior masonry paint so that it prevents water getting into the masonry. And, make sure that you’re using breathable masonry paint so that inside masonry doesn’t get trapped!
Problem: 3 – Cracked and Pealing Walls
Cause: Paints can crack and flake sometimes which exposes the exterior walls. And, if the dry paint splits even through one coat, then it can lead to a complete paint failure. This commonly occurs due to low-quality paint on the wall surface or the paint spread too thin upon the surface and also painting in cold conditions.
Solution: If the cracking doesn’t go down, then you can correct it by removing the flaking paint with the help of a scraper or a bristle brush. However, if the issue exposes to the substrate, then it’s time to thoroughly re-prime and re-paint with good quality exterior masonry paint.
Problem: 4 – Render Failure
Cause: Excessive levels of damps are the main source for causing render failure. Frost and moisture can be trapped between the render and the wall that first cause hairline fractures and these hairline fractures usually lead to render failures, if left untreated. This failure of render can cause damp and decay the interior of your house or building.
Solution: In render failure cases, mostly only localized repairs will be needed. The first task is to gentally remove any hallow and loose cracked render. By doing this you’ll discover bare patches of cracked render. However, make sure that your new render is weatherproofed and carefully protected with an appropriate coat or paint. But, if the render failure is too extensive, then the best option is to remove complete render and start again with a new and more durable coating.
Conclusion: As always, when you’re considering buying a new product, take note of specific data sheets of product before applying on a surface. Or, if you’re still unsure, then seek guidance of any professional.