If you have ceramic or stone tile installed directly to your concrete floor, you may have noticed cracked tile. There can be a number of reasons for this, including inadequate bonding, lack of expansion joints, use of an inferior grade of thinset, and cracking of the substrate. For the purposes of this article, I’ll address only the last factor: cracking of the substrate.
Many concrete finishers will tell you that it’s not a matter of whether or not the concrete will crack, but when it will crack. While there are a number of reasons for the concrete to crack, it’s almost impossible to determine when and where it will crack. Cracking sometimes occurs at the weakest point of the slab. For instance, if there is an inset porch in a floor plan, there may be one or two weak points (more…)