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Old 10-15-2010, 10:36 PM   #1
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No membrane for Shower...?


I've recently hired a "handy-man" to help construct/tile my bathroom. After installing PEX, he has insisted that since my bathroom is on the lower level of my house and on a concrete base, we do not need to install a membrane. I'm thinking this isn't so smart because even though the water goes straight into the concrete if there happen to be any leaks, we have no idea where that water goes after the concrete base or if it will affect any other areas of the house. He's also never heard of the Kerdi product that seems to be very popular on the contractors site. Additionally, we're tiling using marble and he wants to use 1/4 inch grout lines, but reading up on marble, it looks as if 1/8 or smaller is better. Any thoughts? Thanks so much for any inputs.

Jaguar

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Old 10-15-2010, 11:27 PM   #2
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No membrane for Shower...?


hire someone that knows what their doing. Not a handy man

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Old 10-15-2010, 11:38 PM   #3
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No membrane for Shower...?


He showed me his PA license info, so unfortunately I feel a bit misled. I'm guessing this means you think no membrane = problems as well?
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Old 10-15-2010, 11:44 PM   #4
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No membrane for Shower...?


I don't know what a PA license means. In my location, you have to be a state certified plumber. Not to do the tile work, but to install /construct a bath, run water lines, connect drain, etc,
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Old 10-16-2010, 07:17 AM   #5
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No membrane for Shower...?


That shower base need water proofing----There are three common methods---

Membrane under the base

Paint on waterproofing on top with the proper drain--Hydroban by latacrete is one

Surface membrane on top --Schluters Ditra is one--

You do not want this guy building the base for you----Do a 'flood test ' before tiling---Shower Construction Info (a collection of posts) - Ceramic Tile Advice Forums - John Bridge Ceramic Tile

Plug the drain and fill with water for 24 hours----I don't think his pan would pass that test.---Mike---
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Old 10-16-2010, 02:29 PM   #6
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No membrane for Shower...?


If you ever try to floor the basement with any sort of moisture absorbent material (for example carpet or engineered wood flooring) there is a very good chance it will absorb moisture from the slab, often out to a considerable distance from the shower.
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Old 10-16-2010, 02:58 PM   #7
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No membrane for Shower...?


I'll second one of the previous posts - do yourself a favor and head over to the John Bridge Tile Forum. Some of the nicest and smartest guys in the business contribute to that site. Warning - you may get more info there than you can handle =)

good luck!

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