One, Reasons for empty bubbles in interior wall tiles
1、Inadequate workmanship
① Insufficient tile adhesion
When installing interior wall tiles, it is essential to properly prepare the substrate. The substrate should be free of sand, debris, and other contaminants. The presence of such materials can negatively impact the tile adhesion, leading to air pockets and detachment.
②The gaps between tiles are too large.
When laying interior wall tiles, it is crucial to leave sufficient gaps between the tiles to prevent them from being squeezed together due to thermal expansion and contraction, which could cause them to buckle.
2、The quality or mix ratio of the cement mortar is not suitable.
① The quality of the cement is problematic.
Poor-quality cement mortar can affect the adhesion of ceramic tiles. Additionally, when purchasing cement, it is essential to avoid using expired cement.
② Incorrect cement mortar mix ratio
The ratio of cement and sand mortar must be strictly followed according to the specifications. A common ratio is 1:3 (the ratio can be adjusted based on the specific requirements of the project). If the ratio is incorrect, it can lead to insufficient bonding between the wall and tiles, which can cause empty cavities in the interior wall tiles.
Two. How to check if the interior wall bricks are hollow.
Use a hammer and striker to tap on the inner wall surface, selecting four corners and five points in the middle. If the sound is clear and resonant, it indicates the presence of voids. If the sound is dull, it indicates the absence of voids.
- The void rate is standardized, and the void rate of brick walls should be controlled at 5% or less.
III. How to handle hollow spots in interior wall bricks
1、Large-scale bubbling of interior wall tiles.
If there are many hollow bricks on the inner wall, it is recommended to remove and replace the entire wall section, as dealing with individual bricks would be very complicated.
2、Repairing small areas of arched tiles
First, use a cutting machine to separate the joints between the raised and unraised tiles, then carefully lift the tiles, as excessive force can cause them to crack. Thoroughly remove all cement mortar adhered to the tiles, then remove 1-2 centimeters of the cement layer beneath the bricks, ensuring a clean surface. Apply a uniform layer of mixed cement mortar onto the new interior wall tiles and then install them on the wall. After the cement has dried, use joint sealant to reinforce the tiles, which can prevent the tiles from lifting.