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cast iron tub install

17059 Views 4 Replies 5 Participants Last post by  Javiles
I am installing a cast iron Kohler tub and had some questions....
I have 1/2 inch plywood underlayment on top of 5/8 tongue and groove subfloor..planning on 1/4 inch hardibacker butting up against tub...the tub is now sitting on the underlayment...according to Kohler's instructions...all I need to do is shim for level both ways...and that should be it...or am I missing somthing...
my questions are :I have read about using a ledger board ... Kohler says it is not recommended.. should I use one anyway ???...and should my tub be sitting on the subfloor only to ensure the feet are carrying the load or should I now shim all 4 feet to raise the tub up a bit??? I am concerned that the apron might be carrying some of the load the way it is sitting now....
thanks for your help
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144 Posts
We installed this Kohler Cast Iron tub yesterday to dry fit the plumbing.

What a heavy tub.

My plumber and I tried doing it ourselves but it was to heavy. We sat it down in the wrong spot and crushed the trim base a little. Lucky for me it gets hid by the tub - just barely!

With three of us we managed just fine.

Now to patch the floor and set the last tile.

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