Often when called in for chipped or cracked tile restoration we are asked by the homeowner about hollow-sounding tiles. Generally, a tile that produces a hollow type of sound when tapped on may indicate that the tile is not fully bonded to the substrate. Pretty much if the sound generated is a high-pitched tone, chances are the tile is fine. A low-pitched tone often points to installation problems. Though many factors come into play here and may be no cause for panic or concern; for example, if a substrate is less dense it can often produce the same low-pitched tone.
So how does one know for sure that there is a tile bonding issue? Generally speaking, if the entire flooring or countertop installation sounds hollow you can expect that it is probably just the type of substrate used with no debonding issues. However, if there is a marked difference in sound levels within the same tile job, this difference may be indicative that the tile is not bonded to the substrate. It can also indicate spot bonding issues. Spot bonding is an installation method using tile adhesive in spots, usually on the corners of the tile and one in the center, that leaves voids under the tile. Spot bonding does not meet industry standards as it reduces the bond strength between the tile and the substrate leading to possible moisture problems.
If you are concerned about whether your tile installation may have problems with hollow tiles, No More Dirt specializes in this type of tile restoration in Boca Raton and its surrounding areas. Call us for a free consultation and quote at 561-271-4000.