Tiling over hot mop tar?

Discussion in 'General Plumbing Help' started by lamothe1, May 14, 2018.

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  1. May 14, 2018 #1

    lamothe1

    lamothe1

    lamothe1

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    I just had my shower stall “hot moped”. Just wondering how well thinset sticks to the vertical tarred areas. I have a built in seat in the shower that has been also hot moped and wondering if I need to attach hardiboard to it or can I thinset over the tar and attach my tile. I’ve hardiboarded everything except the vertical portion of the seat.
     
  2. May 14, 2018 #2

    havasu

    havasu

    havasu

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    How did you secure the hardiboard?
     
  3. May 14, 2018 #3

    lamothe1

    lamothe1

    lamothe1

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    with screws
     
  4. May 15, 2018 #4

    tanksnotanks

    tanksnotanks

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    Float it or you'll have problems
     
  5. May 15, 2018 #5

    havasu

    havasu

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    I would be concerned with throwing screws into a hot tar job.
     
  6. May 15, 2018 #6

    lamothe1

    lamothe1

    lamothe1

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    a friend of my son says i should use that expanded metal and form it exactly to the shape of the bench then embed it in mortar that i run up the vertical and across the seat, so it's almost like having a concrete seat
     
  7. May 15, 2018 #7

    tanksnotanks

    tanksnotanks

    tanksnotanks

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    Correct
     
  8. May 15, 2018 #8

    Tuffy

    Tuffy

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    If not screws then what should he have used? I'm asking because I don't know and would like to learn the proper way of doing things!!!!
     
  9. May 15, 2018 #9

    havasu

    havasu

    havasu

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    The tar is your water barrier. Throwing in screws defeats its purpose. As mentioned before, floating thinset over the mud makes it tile ready with no screw penetration. It is also your job to taper the floor towards the drain.
     
  10. May 15, 2018 #10

    lamothe1

    lamothe1

    lamothe1

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    the screws i referred to are in the hardiboard which is on the wall above the hot moped area
     
  11. May 15, 2018 #11

    havasu

    havasu

    havasu

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    So your pan is hot mopped but you are referring to the walls above the tar? Yes, way different... and proper.
     
  12. May 15, 2018 #12

    lamothe1

    lamothe1

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    here's the bench and the wall
    [​IMG]
     
  13. May 16, 2018 #13

    havasu

    havasu

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    Unfortunately, your images are not coming through. How are you posting them?
     
  14. May 16, 2018 #14

    lamothe1

    lamothe1

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    i don't have all the screws installed yet. I'm trying to decide weather to remove the hardiboard and install felt paper then reinstall the hardiboard - i was going to put felt up but i forgot till now. Or maybe just keep going. looking on u-tube some say to put up a moisture barrier and some say not to regardless. I'm going to seal it with Redguard and don't i see how the moisture will get into the hardiboard
     

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