Instead fill it with an elastic material capable of sustaining the movement of the floor and the movement of the wall.
Caulk between floor tile and wall.
Never fill this gap with grout because tile grout is not flexible.
This may be due to a sagging subfloor which is.
A carefully run line of caulk known as.
When you install ceramic tile on the floor you must take care to create an expansion joint between the walls and the tiled floor.
When making a home airtight you may find air seepage in the spaces between the subfloor and framed walls.
The tile council of north america recommends at least a quarter inch gap between the tile floor and the walls.
Caulk provides a waterproof seal where tile abuts other materials such as bathtubs sinks or walls.
Otherwise if for example someone showers and gets water on the floor it will get into this.
Caulk seals seams between tile and fixtures or walls.