There are several common reasons why floor tiles can arch or lift. Understanding these causes can help prevent future issues and guide the right repair methods.
First, the expansion and contraction gaps between the tiles and between the tiles and the walls are often too narrow. When temperature changes occur, especially in colder regions, the tiles, cement layer, and subfloor may expand or contract. If the gaps are too small, there's not enough space for this movement, leading to tile arching. This issue is more common in northern areas with large temperature fluctuations. In contrast, southern regions tend to have less arching due to higher humidity and smaller temperature differences.
Second, improper mixing of cement and sand during installation can also cause problems. If the cement grade is too low or too much sand is used, the bond between the cement layer and the tiles may weaken over time. This weak adhesion can result in tiles lifting or becoming loose, especially in high-traffic areas.
A less common but still possible cause is an overly smooth original floor surface. If the tiles are laid without properly roughening the surface, the adhesion between the tile and the cement layer may be insufficient, leading to tile arching over time.
To fix arched tiles, start by checking whether the issue is isolated or widespread. Tap the tiles lightly—if they sound hollow, it means they're not properly bonded to the cement layer. These tiles should be removed and re-laid. If many tiles are affected, a full resurfacing might be necessary.
When re-laying tiles, follow these steps carefully:
- Use a cutting machine to carefully cut the joint between the arched tile and adjacent tiles. Be sure to add water to the blade to reduce dust. Handle the tile gently to avoid breaking it.
- Remove all remaining cement mortar from the edges of the tile. Scrape away the old cement layer underneath, and trim 1-2 cm if needed. Clean the area thoroughly before proceeding.
- Apply a fresh layer of cement mortar. For wall tiles, use a 1:3 ratio (cement to sand), and for floor tiles, use 1:2–1:3. Use 32.5-grade cement. If using white cement, mix it with 108 glue to ensure strong adhesion to the tile surface.
- Re-lay the cleaned tiles, press them down evenly, and use a trowel to compact the cement before it dries. This helps prevent future lifting or cracking.
By following these steps, you can effectively address tile arching and extend the life of your flooring. Whether you're dealing with a few loose tiles or a larger problem, proper preparation and technique are key. We hope this guide has been helpful—let us know if you have any other questions or need further assistance!
Linyi Hmbyan International Trading Co.,Ltd , https://www.hmbyandecor.com