Tile grout is often used in hard tile installations where the natural expansion and contraction of the materials due to environmental factors could cause them to crack against one another. It is used to fill, seal and buffer the area in between individual tiles in a floor.
Available in different colors and weights
Clay based materials such as ceramics and porcelains require the use of grout to prevent cracking
Grout is an accessory that must be budgeted for when planning for tiling