Replies

1. 
   Guest_ | Jun 27, 1999 01:25am | #1

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   I am installing a modern (non-claw foot) bathtub in a nearly completed wooden frame opening. The floor is three-quarter inch plywood covered with one-half inch cement backerboard. Tub contains no nailing strip to attach to studs and not much of a rim to catch the head of a nail driven just above the tub.

   QUESTION ONE: Does it just sit in place?

   Seems suseptible to movement with water and persons--might disrupt tile.

   QUESTION TWO: Should I install tub, then cement backer board that butts against top of tub, then tile over the backer board?

   The only other technique that comes to mind is installing the cement board all the way to the floor, then placing the tub against the backer board, but then the tile would not overlap the tub edge.

   Thanks in advance for your help!

1. 
   Guest_ | Jun 27, 1999 03:30am | #2

   *KAS,

   You might want to call a plumber. . . That notwithstanding;

   If your tub is cast-iron, yes it will sit in place. You should install ledger strip along the back of the wall to help support it. This tub should have an apron that will sit on the "rough" floor. You install the tub before any wonderboard goes on the walls or floor. The rough framing for the tub length wise should be 1/4" larger then the tub. You should also check the "hand" of the tub, whether it's right or left handed, this refers to the side the drain hole is on when your facing the apron. GLP

   Joseph FuscoView Image

1. 
   Guest_ | Jun 27, 1999 05:15am | #3

   *KAS,Joe's advice is right on, but I'd just like to add a couple of things. Assuming it is a 60" tub then 60 1/4" to the rough framing is fine if you go much more be prepared to fur out the wet wall so the backer board sits out far enough over the lip and be sure your plumber centers the tub in the opening. I also like to install some plywood blocking in the two bays that the apron falls on, otherwise when you sheetrock or put the backer board down along the apron there is nothing to nail to. Hold the backer up off the rim an eigth and silicone the joint. Cast tubs commonly have a slight crown to them anyway. The ledger should be held back a few inches from the ends, if you catch 3 studs you should be fine. And don't forget to put a membrane behind the backer, tar paper or poly is fine.Richard Max