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Old 12-02-2007, 11:21 PM   #1
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modified/unmodified mortar


What exactly is the difference and when should you use one over the other? Thanks for clearing this up.

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Old 12-03-2007, 12:06 AM   #2
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modified/unmodified mortar


Modified thinset has latex or other additives which allow a better/stronger bond. If you are putting down a backerboard for flooring, use an unmodified thinset between the backerboard and floor. You can use modified thinset everywhere else.

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Old 12-03-2007, 06:23 AM   #3
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modified/unmodified mortar


From the TV show Holmes on Homes.
If your bonding:
porous surfaces, use modified
non-porous, use non-modifed
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Old 12-03-2007, 07:32 AM   #4
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modified/unmodified mortar


Quote:
Originally Posted by Rehabber View Post
...If you are putting down a backerboard for flooring, use an unmodified thinset between the backerboard and floor. You can use modified thinset everywhere else.
With one exception...when installing tile on Kerdi...only use un-modified high-grade thinset.
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Old 07-11-2009, 11:02 AM   #5
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modified/unmodified mortar


What about laying tile on a shower floor? Modified or unmodified?
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Old 07-11-2009, 06:24 PM   #6
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modified/unmodified mortar


Ruth, you would probably be better off starting a new thread for your question. I've never done a shower floor but I know there is alot more to it than just modified or unmodified mortar. What kind of pre slope or pan do you have? Liner? Drain? Lots of things that you need to share to get an answer

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