I imagine a flexible grout was not used .........are the tiles loose.?
I would say the tiles are loss, causing excessive movement and ultimately the grout is failing.
Try 'chapping' the tile with your knuckles or a rubber hammer. If the tiles move or make a ping noise they haven't been fitted right. A few things can cause this- tiles not installed properly, plywood not fixed to the floor properly or wrong adhesive used.
Grout cracking like that after two days is bad news. Sorry
yes they do move slightly. He told me a flexible adhesive was used on the tilesI would say the tiles are loss, causing excessive movement and ultimately the grout is failing.
Try 'chapping' the tile with your knuckles or a rubber hammer. If the tiles move or make a ping noise they haven't been fitted right. A few things can cause this- tiles not installed properly, plywood not fixed to the floor properly or wrong adhesive used.
Grout cracking like that after two days is bad news. Sorry
Your wish is my command. Here are some photos of under the tile. The water is because I wet the floor to clean it.Pull a loose tile up and let's see a photo of the back of the tile and the floor where it was lifted from? Pretty sure I can guess what you'll find. If you simply let him regroup it tomorrow, then it'll be a total waste of time.