Replies

1. 
   EricPaulson | Aug 25, 2008 03:12am | #1

   At $150.00 a roll, I can't understand why you would not abide by the instructions.

   I'd go back to that "rep. at the local tile shop" and call his boss out onto the carpet.

    

   I'd put a call into a real rep at Schluter at this point in time.

   Eric

   [email protected]

    

    

    

    

2. 
   Dinosaur | Aug 25, 2008 04:34am | #2

   Tile mastic and modified thinset both dry by evaporation; they do not set. Kerdi (and other tile membranes such as Ditra) are waterproof...so they prevent any evaporation from happening. That is why Schlüter instructs you to use unmodified thinset between their membranes and any impervious substrate or tile. Unmodified thinset sets by chemical reaction; once it is hydrated it will harden even inside a plastic bag or sealed bucket.

   At the very least, you are going to need to start over again with new Ditra. Throw out the mastic-contaminated stuff. And unless you can get every bit of that dried mastic off that shower pan, you'll have to tear that out, too.

   Finally, as Eric mentioned, if your local tile-store guy really did tell you it was okay to use mastic on Kerdi (and if you can prove he said it) you have a pretty good claim against him to replace the materials you ruined following his incorrect instructions.

   Dinosaur

   How now, Mighty Sauron, that thou art not brought
   low by this? For thine evil pales before that which
   foolish men call Justice....
   

   

1. 
   HalifaxReno | Aug 25, 2008 04:34pm | #3

   I'd like to save what is there, if I peel back the Schluter membrane and let the mastic dry, do you think I would have any problems reapplying with an unmodified? Will they adhere to each other?
   Thank you for your input!

1. 
   Piffin | Aug 25, 2008 04:44pm | #4

   "if I peel back the Schluter membrane and let the mastic dry,"That is a mighty big IF there! I have seen twenty year old mastic that was not fully "set up", and this is a floor of a shower where it will see a lot of water.You already have something screwed up by ignoring the manufacturers specific instructions.Learn from that mistake instead of compounding it.Believe me, this is right up there with using diesel in a gas tank or mixing oil and latex paint in the same can.get that mastic off the pan if you can do it without poking holes in it, give it a few days to dry the residue, and then do it right. If it won't come up, you need the pan renewed.
    

    

   Welcome to the Taunton University of Knowledge FHB Campus at Breaktime. where ... Excellence is its own reward!

1. 
   HalifaxReno | Aug 25, 2008 06:00pm | #6

   Thank you for the advice. I definitely will lean from the mistake!
   Experience is the best teacher especially when you bugger something up!

1. 
   seeyou | Aug 25, 2008 06:32pm | #7

   I definitely will lean from the mistake!

   Don't lean to far. If I leaned from all the mistakes I've made, I'd be horizontal by now.View Image

2. 
   HalifaxReno | Aug 25, 2008 06:59pm | #8

   :)

3. 
   Dinosaur | Aug 25, 2008 09:39pm | #9

   Nah. You'd just fall off the roof.

   Dinosaur

   How now, Mighty Sauron, that thou art not broughtlow by this? For thine evil pales before that whichfoolish men call Justice....

2. 
   stevent1 | Aug 25, 2008 04:46pm | #5

   Welcome to BT,You will have to somehow remove all of the mastic.Post this at John Bridge Tile Forums.http://johnbridge.com/vbulletin/forumdisplay.php?f=1 Chuck Slive, work, build, ...better with wood