Do you need to scrape putty for the old wall tiles in the kitchen and toilet

1. There is no need to scrape putty, and the tiles are directly pasted with cement sand;

2. The tile should be stuck on the cement to be the firmest, the cement surface area (microscopic) is large, clean and oil-free, and the binding force of the tile and the cement is large, so it is firm. The situation is completely different when the primer is applied to the primer, which is smoother than cement, the surface area is smaller, and the primer is oily, and its adhesion to the tile is low. In addition, there is also a problem of the adhesion between the primer and the lower layer, once the primer has a problem with the lower layer, it is equivalent to a problem with the tile.

Therefore, applying primer before pasting tiles is both laborious and costly, and thankless.

Sticking bricks is pasted with cement sand, you can paste the original old wall tiles directly, but if you are putty on the wall, you need to shovel off those putty before you can paste it, because putty is waterproof, and it is relatively slippery, if it is a brick on the wall with putty, the tiles will fall off in a few days. Therefore, the wall surface required for tiling is a cement wall.

You don't need to use it, and you don't dare to use it, otherwise the bricks will fall.

If you don't use it, after you turn it, you will only get putty after the carpentry is finished.