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Discussion Forum

Creating a solid base for tile

jab | Posted in Construction Techniques on April 17, 2002 07:25am

I have a tile floor project in a typical 1950’s California ranch home with a perimeter foundation and piers/posts.  The floor support system is made up of a 2 x 6 T&G subfloor attached to 4 x 6 girders on 4′ centers.  The girders rest on 4 x 6 pier posts spaced approximately 5′ on center and as typical the the posts sit on blocks attached to a concrete pier set into concrete (probably around 3′ x 3′ x 1′ – 1.5′ deep).  The tile area is approxamately 16′ x 20′. 

Has anyone tiled over this configuration with 1/2″ concrete board and found cracking of the tile or grout?  I’ve been told that the existing floor needs to have an additional girder placed between each existing girder and then new piers to create enough support to prevent cracking (ie virtually no deflection).  I have successfuly tiled over several bathrooms without any failures, but never an area so large as is planned.  Thanks for your comments.        

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Replies

  1. rez | Dec 20, 2008 04:56am | #1

    bump

     

     

     

     

     

    94969.19  In the beginning there was Breaktime...

  2. andybuildz | Dec 20, 2008 05:08am | #2

    Go to John Bridges forum and use the free deflection calculator.

    http://www.johnbridge.com/vbulletin/deflecto.pl

     

     

     

    http://www.cliffordrenovations.com

    http://www.ramdass.org

     

    1. User avater
      JeffBuck | Dec 20, 2008 07:15am | #3

      wonder if that type of construction is available on the deflectOmeter ...

      it's unlike anything I've worked on so I couldn't even offer a guess.

       

      your idea's the best, hope to find someone familiar with it on Bridges.

      Jeff    Buck Construction

       Artistry In Carpentry

           Pittsburgh Pa

      1. andybuildz | Dec 20, 2008 10:01am | #4

        Thing is..those guys don't know a whole lot about construction but he may happen to find someone that does.....

                   gotta start somewhere.

        speaking of which...been tiling all week...my fingers are totally numb...using the wet saw out in the cold SUCKS!!

         

         

         

        http://www.cliffordrenovations.com

        http://www.ramdass.org

         

        1. rez | Dec 20, 2008 10:22am | #5

          Nice.

           What kind of saw are you using to cut those diagonals? 

           

           

           

           

          94969.19  In the beginning there was Breaktime...

          1. andybuildz | Dec 20, 2008 11:27am | #7

            same saw that I did this BBQ for...which is in a few of the photos in the slide show

            http://picasaweb.google.com/andybuildz/BBQTILETOP?feat=directlink

             

             

             

            http://www.cliffordrenovations.com

            http://www.ramdass.org

             

          2. rez | Dec 20, 2008 09:29pm | #12

            Man, came out nice especially the edging. That answered the question of what the pt 2x4 was doing laying in the earlier pics.

            So you've been doing more tile work of late? I saw the results of loose cracked tiles from a said pro in a house the other day and it looks like the need is pretty great.

             

             

             

             

             

            94969.19  In the beginning there was Breaktime...

            Edited 12/20/2008 1:29 pm ET by rez

        2. skipj | Dec 20, 2008 11:12am | #6

          Why did you not justify the corner?

          1. andybuildz | Dec 20, 2008 11:27am | #8

            whatcha mean? If you mean the diagonal tiles...thats the design they wanted.

            Mirror imaged the corners...

             

             

            http://www.cliffordrenovations.com

            http://www.ramdass.org

             

            Edited 12/20/2008 3:30 am ET by andybuildz

            Edited 12/20/2008 3:50 am ET by andybuildz

          2. User avater
            EricPaulson | Dec 20, 2008 06:04pm | #9

            What he meant was doing it so it look like a full tile is wrapped around the corner.

            Can be a pia, what you did is the "other" way and it looks fine. 

          3. andybuildz | Dec 20, 2008 06:29pm | #10

            I thought I answered him. I offered the customer several choices including what he suggested but they opted for the mirror image look like you see in the photos.

            Things might have to change in the shower area though. Same tile on the walls but when i hit the 4 corners that way the opposing walls I'm guessing won't line up. Might suggest making  the short end walls square insted of on the diagonal. Not sure yet.

            The kerdi I think worked out mint. When I look into the drain where I tucked it...it stops right atthe top of the threads. Anywater that might get past that point will go along side them...hit the spacers I mounded up over the weep holes and down into the drain. Seems pretty leak proof to me.

            Notice the rubber cup (stopper) I put in to catch any debris untill I'm finished.and the Kerdi goes right to the end of my thinset

            View Image

            View Image

            View Image

             

             

             

            http://www.cliffordrenovations.com

            http://www.ramdass.org

             

          4. User avater
            EricPaulson | Dec 20, 2008 09:17pm | #11

            Looks good Andy. 

        3. User avater
          JeffBuck | Dec 21, 2008 07:03am | #13

          cold hands?

           

          here's my tip for the day.

          go to an outdoor store ... hunting and fishing kinda place.

          get a pair of neoprene gloves ... same material as wet suits.

          forget where I got mine ... Cabelas maybe?

           

          anyways ... they're 100% waterproof ... and 100% warm.

          mine have a textured rubber grip added to the palm and fingers.

           

          real grippy, even on small tile pieces.

          pefect for winter wet sawing.

           

          have also heard about putting an imersion heater in the pan, haven't tried that yet.

          Jeff    Buck Construction

           Artistry In Carpentry

               Pittsburgh Pa

          1. andybuildz | Dec 21, 2008 05:56pm | #14

            appreciate the tip Jeff...but I'm about to do that right after I put on my eye and ear protection...lol

            Same ol same ol....suck it up and bitchNmoan

             

             

             

            http://www.cliffordrenovations.com

            http://www.ramdass.org

             

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