With the development of technology, ceramic tiles are made of various materials, such as clay, all-ceramic, vitrified, etc. Ceramic tiles also vary widely in their water absorption rates. The traditional cement mortar paving method can no longer meet the paving requirements of low water absorption ceramic tiles. This way the tile adhesive appears.
It is different from traditional cement which relies on hydration reaction to stick. Tile adhesive relies on adhesive action to stick to tiles and walls. Therefore, the level of water absorption will not affect the sticking effect.
Why does the tile adhesive still cause hollowing and falling off of tiles after using it?

1. The cement mortar leveling layer on the wall is hollow and cracked.

When using adhesive to lay wall tiles, the wall must be leveled in advance. Because the thickness of the adhesive is only about 5mm. The flatness of the wall must be adjusted in place during base layer treatment. This leveling layer sometimes occurs due to reasons such as incomplete waterproofing of the original wall, unreasonable cement mortar ratio, and insufficient maintenance after plastering. Hollow cracking occurs. Check carefully before laying tiles. If there are any problems, rectify them first and then lay tiles to avoid greater losses later.

2. Add other materials to the adhesive

Due to the characteristics of the adhesive, it will be thicker than traditional cement mortar. During construction, some workers may feel that adding some cement can improve scraping. In fact, this approach destroys the raw material ratio of the adhesive. Greatly reduces adhesion and service life. Maybe there was no problem at the time. But after a long time, hollowing and falling off will occur.

3. No thin-sticking method is used for construction

New materials need to be matched with new techniques, and the thin paste method has completely subverted the traditional method of pasting ceramic tiles with cement mortar. At the beginning of the conversion, workers would find the process cumbersome and difficult to operate, so they mixed the adhesive and followed the traditional “thick paste” method of paving and pasting materials on the back of bricks. The adhesive is very sticky and has strong shrinkage. In this way, the thickness of the adhesive is very large, the air in the bonding surface cannot be completely eliminated, and the contact surface does not meet the requirements. The consequences range from hollowing of the tiles to cracking of the brick surface and falling off of the brick body.

4. Materials deteriorate due to moisture

Adhesives are generally powders packaged in breathable paper bags or nylon bags. The decoration site is affected by other construction water, rain, moisture and other reasons. It is easy to cause the tile adhesive to get wet and exposed to water.
Once an adhesive that is exposed to moisture and water is used, you may not see any difference during construction. However, the active ingredients in the material have already combined with moisture and matured. The bonding ability is greatly reduced. Over time, the tiles may become hollow and fall off.

5. Use beyond the scope

General household tile adhesive is for interior decoration only. Some customers require workers to use adhesive to paste ceramic tiles on outdoor terraces, exterior walls, or outdoor pools. These locations are easily affected by natural weather and high temperature exposure. Low-temperature freezing and other effects can cause the brick surface to crack, hollow, and fall off.