Since it was first used thousands of years ago, plaster has remained a popular choice in construction thanks to its ease of use and durability.
Plaster is a great choice for your exterior walls, but there are times when it will begin to show wear and tear.
By learning more about the common problems with exterior plaster, you’ll be able to resolve them before they cause bigger issues.
Here are some of the most common problems with exterior plaster, and how to easily fix them.
Plaster cracks commonly occur in older buildings and are caused by a number of factors including changes in humidity and temperature or from not being installed correctly.
Thin, smaller cracks are known as hairline cracks. While these can damage the cosmetics of your house, they don’t usually pose a structural threat and can be left alone.
Deeper cracks can indicate structural damage and should be evaluated and repaired by a professional.
Discolouration is a common problem that affects exterior plaster, caused by exposure to light, moisture, mould and chemicals in the air.
Discoloured plaster can be replaced or removed, however, in some cases, it may require specialised cleaning or repair.
Exterior plaster will peel and flake for a number of reasons.
Moisture, structural issues, and mistakes during the initial application are some of the most common causes.
For moisture issues, repairing the plaster at its source and re-painting it with stain-blocking paint will likely be enough to solve the problem.
Peeling or flaking plaster caused by structural issues will need to be addressed by a professional before it can be repaired.
Water damage can cause plaster to bubble and bulge, and if left can lead to mould.
If you notice bubbling or bulging plaster, find and stop the source of the leak before removing and reattaching that portion.
Shrinkage occurs when the plaster dries too quickly during the application. Which can lead to cracks and uneven surfaces.
When applying plaster, make sure that it is mixed correctly, using the correct ratio of plaster to water. Plaster applied with even thickness and given adequate time to dry will prevent shrinkage.
Quality Plasterers are the go-to option for exterior plaster in Auckland. To find out more about the services we offer, visit our website today and you can contact our team for a free quote today.
Repair exterior plaster by first identifying the problem, then fixing the cause before you patch the surface.
What causes cracks in exterior plaster walls?
Exterior plaster cracks often occur in older buildings due to changes in humidity and temperature, or because the plaster was not installed correctly. Some cracks are only cosmetic, but deeper cracks can signal a bigger issue.
3. How do I fix cracks in exterior plaster walls?
Hairline cracks usually do not pose a structural threat, so you can often leave them as they are.
If the crack is deeper, a professional should assess and repair it.
4. What is exterior plaster crack repair?
Exterior plaster crack repair means dealing with cracks based on their depth and risk, not just their appearance. It separates cosmetic hairline cracks from deeper cracks that should be evaluated and repaired by a professional.
5. Do exterior plaster cracks need professional repair?
Not always, because hairline cracks usually do not pose a structural threat.
Yes, if the crack is deeper, because deeper cracks can indicate structural damage and should be assessed and repaired by a professional.
Prevent cracking by addressing issues early and making sure plaster gets applied and dried correctly.
Also, Shrinkage can cause cracks when plaster dries too quickly, so use the correct plaster-to-water ratio, apply it evenly, and allow enough drying time.
