Recent content by mikechris

Thanks for your comments JohnD. However, the concrete floor looks good and dry. The bulging effect seems to be within the tile/grout as they have lifted off the floor. Could it be that something has caused the grout to expand?

I had a ceramic tile floor fitted onto concrete in my kitchen about 12 years ago. They have just started bulge - as though they are under some sort of pressure. Around 12 are no longer attached to the floor and bulging upwards. The grout is starting to crack. I've removed a small tile and the...