If you have tile on the wall adjoining the tub select a caulk that matches the color of the grout.
Large gap between tile and wall.
This small gap is created by the compressed thickness of the organic mastic or the cement thinset used to attach the tile to the backer board.
Get photos of great finish details include photos with bid and contract.
This can be found at well stocked hardware stores but not always at large home improvement centers.
Fill gaps larger than 1 8 inch.
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Push the appropriate size backer rod into the gap below flush with the surface.
A pencil tile trim would cover the gap.
Darciegage2 has the best solution.
Fill larger gaps with foam backer rod sometimes called spline.
Big box stores have them.
The gap is easily filled with the tile wall grout.
Large gap between tub and tile 1 2 how to caulk.
Backer rod and caulking masking tape off the wall and tub to pull a straight line.
Also check concrete supply centers as backer rod is used to fill gaps in poured concrete walls.
The tile council of north america recommends at least a quarter inch gap between the tile floor and the walls.
Grout is no used between countertop and wall tile.
Any gap should never be greater than 1 8 inch.
Instead fill it with an elastic material capable of sustaining the movement of the floor and the movement of the wall.
Caulking is the best choice for this application.
Ceramic tile wall gap back of tile should rest on finished wall.