The grout is coming out due to movement in the substrate. Over a garage door the floor is going to “vibrate” quite a bit. If the tile installation did not compensate for that movement the vibrations will slowly abrade the grout out of the grout lines.
Why is my grout between tiles breaking up?
Here are 4 causes for why the grout between tiles may be breaking up: Improperly mixed: Powdery cement is mixed with water to create the pasty substance that is packed in between tiles. When the ratio between the two is off, it can lead to instability in the binding agents.
This begs the query “How long does Grout last on floor tile?”
Grout, the mortar that fills in the gaps between tiles, can last for decades when mixed and applied properly. However, it’s possible for it to crack, crumble or otherwise break up after being installed. For those that are noticing the grout in their floor tile is breaking up, it can be very frustrating, especially if the tiling was done recently.
Why does my grout keep coming out?
Too much water or polymer additive in the grout mix is a common problem. Cracked grout is frequently the result of weak grout structure.
We there are two main reasons why grout may begin to suddenly fall out in some spots. The first possibility is that there was an improper amount of water mixed with the grout when it was mixed. When too much water is added, it begins to create an issue with the bonding of the substance.
Why does my Grout pop?
The most common reason for popped grout is inadequate thinset coverage holding the tile to the floor. First the tile begins to see-saw a little, then the grout bond cracks and starts to come loose.
Grout Cure Times Most cement-based grouts require a cure time of 48 to 72 hours before applying a penetrating sealer. After sealing, wait a minimum of 24 hours before using the shower; some products may recommend three days instead .
What causes grout to go bad on wood floors?
Or the culprit may have been seasonal movement of a wood-floor system. The installer might have mixed too much water in with the grout or used too much water at that spot in the floor when dressing the joint. Or the grout itself could have been bad.