Just tile over RedGard on the sill however you like. Any water that gets behind and under the tile (and it will) with harmlessly drain down the wall. If the tiles are too big, cut them. Or use dedicated bullnose tiles, which may be the right size and are likely to have a nice lip to them.

How do you tile a window sill in a shower?


Quote from Youtube video: You want to make sure you take all the necessary steps required to waterproof this inside enclosure. First before installing your tile.

How do you tile a bathroom window ledge?





How to Tile a Window Sill

  1. Remove Paint and Primer. Prepare the surface of the sill using an 80-grit sanding block. …
  2. Determine Tile Spacing. Start at the center of the sill from side to side. …
  3. Cut the Filler Tiles. …
  4. Mark the Face of Each Tile. …
  5. Sand the Tile Edges. …
  6. Mix Your Thin-Set Mortar. …
  7. Install the Tiles.


How do you tile a shower ledge?

Quote from the video:
Quote from Youtube video: So one of the most critical steps of this whole shower curb tile installation is to make sure that the tiles on the top are sloped in towards the shower.

How do you cut a window sill with tile?

Quote from the video:
Quote from Youtube video: And leave a little overhanging. So you can continue on as far as the depth goes you bring it up you bring the face it up the face of it up to where you want it you're going to make a pencil line.