Bond Loss
In loss of bond field testing, tiles are often loose and may be removed with little or no effort. The tile when examined may reveal either a substrate bonding or tile bonding problem. If the tile was installed at high temperatures outside of the manufacturer's recommendations, bond loss could result
Grout Discoloration
Inconsistent grout color appears as dark or light areas of grout, mottled, spots, streaks, or yellowing of white grout. Notwithstanding and installer’s best efforts to follow guidelines, discolored and/or inconsistent grout colors will often occur due to the inconsistent nature of Portland cement.