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Old 04-04-2006, 02:26 PM   #1
NorthernConfederate
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Question Question about no curb walk in shower

We have an older house that we are remodeling and want to put a shower in the bathroom that won't have a curb (a flat floor that slopes to the drain). The floor previously had small tiles on it that were laid in a mortar bed. After taking up the old floor and getting down to the floor joists, we have a little more than 1 1/2 inches from the top of the floor joists to the top of the finished floor in the hall way. The bathroom is 11 feet wide and 7 feet long. The shower area will be 4 feet wide and 7 feet long. The floor joists are 2" x 10" joists on 12" centers. Since the shower area needs to end up at the same elevation as the rest of the bathroom floor, do we need to cut the floor joists in the shower area enough to make the shower bed? What is the best way to make certain that the bathroom floor and the shower bed will then be waterproof? Finally, since we only have 1 1/2" from the top of the joists to the top of the finished floor, can we use one sheet of 3/4" drywall with concrete backerboard as the sub-floor to get to the finished floor height or do we need to use two 3/4" sheets of plywood and deal with a much higher bathroom floor than we have in the rest of the house. Thanks for you assistance!
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Old 04-04-2006, 08:32 PM   #2
muskymike
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Hi there, welcome! Gotta first name we can use? Check this out a curbless shower I did with Ditra and Kerdi. You should be able to mud the floor sloping it to the drain and keeping it flat everywhere else. You can use Kerdi on the whole floor doing that way. Can you post some pics?
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Old 04-05-2006, 08:46 AM   #3
NorthernConfederate
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Thanks Mike!

Mike:

Hi! My first name is Don. Thanks for the reply and the information that you attached on your project. The pictures were great and they will really help our project! The one thing that you didn't mention in the thread about your project is how you dealt with the subfloor and joists. As I mentioned in my post, we have 1 1/2" from the top of the joists to the finished floor in the hall. The joists are 12" on center. Do I cut the joists down in the shower area so that I can install a mortar bed? I don't mind cutting them some, but I would like to minimize the amount that I cut off. Also, what would be the best subfloor system to use so that the rest of the bathroom comes out even with the hardwood floor in the hall? Thanks for your help! I really like this forum!
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Old 04-05-2006, 09:37 AM   #4
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Hi you guys... mike, that shower you did is really cool.
What's the very limit of slope you need to keep water going to a drain? Would an 1/2" be enough over 5 feet?
So, is the kerdi on the floor doing the same job as a mud pan? does the kerdi lead water into the weep holes of a Kerdi drain?

_______pete

hope the questions are ok for the thread...
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Old 04-05-2006, 10:50 AM   #5
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Pete, the slope should be 1/4" per foot. 1/2" in 5 feet is too level.

Kerdi replaces the liner. The Kerdi mat bonds to a special Kerdi drain, so there are no weepholes. Water never goes farther than the backs of the tiles, so it drains really well.

Start your own thread so you get consistant answers about your specific project. It helps us help you better. However, feel free to ask general questions where ever you want.
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