How to do empty drum inspection?

When paving the big size tile, be sure to use a toothed scraper to evenly apply the adhesive on the back of the big size tile, the wall or the ground. Pay attention to scraping the teeth along the short side of the big size tile, also the wall and the big size tile need to be scratched in the same direction to facilitate the air discharge and avoid the problem of falling off caused by the hollowing of the tile glue. One hour after paving, check for empty drums. Knock on the surface of the big size tile. If you hear the "empty" floor tiles, you must try to re-lay them. The caulking construction can be carried out 24 hours after the tiles are laid.