Plastering is a process that requires precision and attention to detail. However, even experienced plasterers can encounter challenges during the process. Here are some common plastering problems and practical solutions to help you achieve flawless results:
- Grinning:
Problem: Where the cement and joint positions are clearly visible through the plaster.
Solution: Apply a plaster undercoat before plastering to create a smooth and uniform base.
- Crazing:
Problem: Where you find a network of closely spaced fine cracks.
Solution: Use better quality plaster sand or reduce the amount of cement in the mix. Avoid over-trowelling, which can contribute to crazing.
- Cracking:
Problem: Having larger randomly spaced cracks.
Solution: Adjust your mix to be less cement-rich and use high-quality sand. Limit plaster thickness to 15mm per coat to minimise cracking.
- Lack of Hardness:
Problem: The plaster easily chips or scrapes off after hardening.
Solution: Prevent this issue by addressing the causes listed above, such as using the correct mix ratio and avoiding over-trowelling.
- Debonding:
Problem: The plaster doesn't adhere to the wall after hardening.
Solution: Properly prepare surfaces before plastering by ensuring they are clean and free of debris. Limit plaster thickness to less than 15mm and avoid overly cement-rich mixes.
Additional Tips:
Avoid plastering in direct sunlight or during drying winds, as this can lead to rapid drying and potential cracking or debonding issues.
Maintain a consistent thickness and application technique throughout the plastering process to minimise the risk of problems.
By understanding these common plastering issues and implementing the recommended solutions, you can overcome challenges and achieve professional-quality results. Remember to pay attention to your mix ratios, application techniques, and environmental factors to ensure a successful plastering project every time!