Don't Put BackerBoard Inside Shower Pan

Please don't do this, you're asking for problems. If you see your contractor do this STOP HIM !
Here is how I do the wallboard...
https://youtu.be/cNLaNE2h9H8

FOR THE ALUMINUM EDGING CLICK BELOW
https://www.amazon.com/gp/product/B006GDPGWC/ref=as_li_tl?ie=UTF8&tag=starrtile-20&camp=1789&creative=9325&linkCode=as2&creativeASIN=B006GDPGWC&linkId=40ce79612cc084fa2c09d10cffcf4d65

FOR THE DRAIN YOU SEE CLICK BELOW
https://www.amazon.com/gp/product/B07PN88DK1/ref=as_li_tl?ie=UTF8&tag=starrtile-20&camp=1789&creative=9325&linkCode=as2&creativeASIN=B07PN88DK1&linkId=edd3b93a9f9750a10934af67693a1e3d

Видео Don't Put BackerBoard Inside Shower Pan канала StarrTile