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Walk in shower installation, shower pan liner and hardibacker

Walk in shower installation, shower pan liner and hardibacker

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Old 11-29-15, 09:24 PM
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Walk in shower installation, shower pan liner and hardibacker

I am remodeling my bathroom, I have demo'ed and framed a niche for the shower. I have also installed the hardibacker to the walls and prepared the plumbing. I was about to construct a pre-slope for the pan liner, however I am seeing conflicting information that the pan liner should go behind the backer board. Is this the only way? I plan on using liquid waterproofing on all of the walls and niche. If I have to tear out the backer board for the liner; could I cut 13-16" from the floor, install the pan liner, screw the top part of the backer board into the studs, then put floor mud for the pre slope and to hold the bottom of the backer board to the wall? If not what would the best way to go about this be?
Thanks in advance everyone
 
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Old 11-30-15, 04:06 AM
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Yes liner goes behind the backer board. Preslope and liner are done before the walls and the final slope is done after the backer is up. Cutting a strip out will leave the lower portion of the wall weak. You would need to install blocking to support the areas between the studs. Hardibacker on the walls should be the 1/2" kind and not the 1/4" kind. 1/4" is for floor/countertop applications only.

For the pre-slope, you need to put down 15# felt paper and wire lath then bedmud. Drain body should sit up off the floor so that the preslope is thick enough at the drain and has a 1/4" per foot pitch out to the walls.
 
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Old 11-30-15, 07:26 AM
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Thank you for the info. It is 1/2". So my only option is to take it out, pre slope, and instal liner?
 
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Old 11-30-15, 02:46 PM
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So my only option is to take it out, pre slope, and instal liner?
Only if you want to do it correctly. I assume you are doing a traditional liner with preslope mudbed and not another type of system such as kerdi or other drain system.

Our favorite link has gone black, but here is a close one to follow. Add 2x10 blocking between the studs to support the liner, buy inside corner pieces to protect the liner cut over the curb. Look into preformed curbs that slip over the wood and liner and are installed before your final mud bed. No nails anywhere except above 9" on the inside of the shower or the outside of the curb only. Inside of curb is held in place with deck mud.

It is a 5 part series, here is part one - How to Create a Shower Floor – Part 1
 
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