Tile Shower Floor Grout Or Caulk

Since you are joining two different materials together you should use caulk in the space where the floor tile and tub meet.

Tile shower floor grout or caulk.

A properly installed tile shower should always have a 6 inch lip liner going up around base of the shower walls. My tile installer recently told me that he wanted to use caulk in the corners of a tiled shower instead of grout is that necessary. On one hand there is little chance for movement around the base of a properly installed tile shower floor. Though grout is more porous than caulk it s best for tiled shower walls and floors.

Or where the edge of a tile meets the wall. Caulk is impermeable meaning it won t let in water. If mold gets into that space it can cause damage to your subfloor. An area of controversy has always been whether to caulk or grout around the base of a tile shower floor.

In addition to caulking shower fixtures experienced tile setters caulk in all changes in planes in showers including corners surface edges and wall to floor intersections. The vast majority of showers that i ve tiled have had no problems when i use grout in the corners. Grout is not flexible so it s not the best material for the job while caulk allows for movement and also provides a better sealant. Tom meehan a second generation tile installer and co author of working with tile who lives and works in harwich mass responds.

This is largely because of the way grout binds with backer board the concrete material placed behind tiles.