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Old 03-07-2009, 12:24 PM   #1
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tiled shower floor


I have just removed the floor tiles from a new shower install in our basement as the water was not draining - no slope ! I am now left with the liner exposed but it was installed flat on the sub-floor (no sloped cement underneath). It rises in the centre at the drain by about 1/2".

I am pretty sure the way to proceed is to remove the bottom wall tiles,
remove the liner, cement with slope, re-install the liner and then cement
with tiles. However, I am wondering if I create the slope over the liner, how
long would it be before I see any water damage. Wouldn't the water run off
anyhow from the sloped tiles ? Is there much water penetrating the grout ?
I may be trying to cut corners but if this would work, I may decide to go that route. This was built in the basement over cement floor and sub-floor.
Any advice ?

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Old 03-07-2009, 01:20 PM   #2
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cutting all these corners will only let the system fail again in short time. you will find mold for sure. The sub-floor below the mud job must be sloped. Then a waterproofing membrane which is carefully folded and sealed at corners, tied to the drain (with a drain weep system) and the membrane needs to run up 12" or more on the walls and over the curb. the mud alone or tile alone sloped will do nothing. Water moves through grout and mud.

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Old 03-07-2009, 04:06 PM   #3
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If you're not going to do it correctly, why bother at all? Cutting corners in this job is just stupid.
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Old 03-07-2009, 04:43 PM   #4
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Quote:
Originally Posted by Ron6519 View Post
If you're not going to do it correctly, why bother at all? Cutting corners in this job is just stupid.
Ron


Don't you love this part?
Quote:
how long would it be before I see any water damage.
They already know it will not work, just want an estimate of how fast it will fail.
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Old 03-07-2009, 04:55 PM   #5
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I kind of knew this is the answers I would get. Actually found on
www.ontariotile.com "how to build a shower pan".
Lots of pictures and advice.

Sure glad we held $2K from the original contractor.

Don't worry, we won't take a shortcut. Bottom rows of wall tiles
coming off including waterproof drywall in order to remove liner,
install sloped cement on mesh, re-install the liner , cement and tiles.

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Old 03-07-2009, 05:23 PM   #6
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No short cuts? slope is first down with plywood base. Then wire mesh and mud. Then NEW membrane attached to the drain and up the walls 12" (not one row of tile) then mud base then thinset and tile then grout (after tile shrinks and leaves little gaps to fill) then sealer this is not a DIY project. But a Kerdi shower pan and you will be able to do it right.

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