how to treat area just outside of tub or shower

[roundrightfarm]

I'm getting ready to tile two bathrooms, one with a tub and one with a shower. I'm wondering what the best way to treat the area just outside the shower door and along the base of the tub. The tub area in particular could be subject to lots of continuous wetting, especially when kids have a little too much fun.

I'm using 8mm cement backer board. Should I Silicon the gap between it and the tub base, then tile for a consistent grout line next to the tub, and then grout the gap over the Silicon? Is there a better way?

 

[Time's Ran Out]

Are you tiling the floor?

 

[roundrightfarm]

yes, tiling the floor. It is actually a 6mm tile backer. not 8mm

 

[Time's Ran Out]

Tile the floor first . Sit the tub on it and seal the gap.

 

[Tile Fix Direct]

Which backer board are you using. A full cement backer board or a sandwich style board such as Orbry (Polystyrene with cement scrim top and bottom) are unaffected by water, but not at the board joints. Tape all floor joints and perimeter skirting between floor and wall.
Orbry Waterproofing Tape Roll - https://www.tilefixdirect.com/product/Orbry-Waterproofing-Tape
Orbry Tape Sealing Compound - https://www.tilefixdirect.com/product/Orbry-Waterproof-Tape-Sealing-Compound
Orbry Waterproofing Corners - https://www.tilefixdirect.com/product/Orbry-Waterproofing-Corner