New acrylic airtub installation, where to put ledger?

Discussion in 'Shower & Bathtub Forum & Blog' started by chrisexv6, Nov 25, 2016.

  1. chrisexv6

    chrisexv6 Member

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    Oct 6, 2008
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    Connecticut
    Installing a Bain Ultra Citt soaker/airbath. Their tech support said a ledger isnt required but I can put one if I want (and, I want!)

    Because of the molding, etc, the underside of the deck is pretty rough. Im having trouble figuring out just where to screw the ledger to the surrounding walls. The tub has a built in apron, so I cant "see" through the front of it.

    Any tips? I tried guesstimating one end and carrying a level line all the way around, but that didnt work (the guesstimated end is resting on the ledger, the other 2 sides are not)

    Thanks in advance.

    -Chris
     
  2. Terry

    Terry Administrator Staff Member

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    Bothell, Washington
    I sometimes hold the ledger under the lip of the tub where it's out in the open, and measure down to see my height that I will be setting it at.
    What does the bottom of the tub look like?
     
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  4. chrisexv6

    chrisexv6 Member

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    The tub has integrated feet on the bottom. Is a ledger required at that point? I plan on using a mortar bed as well.

    I will measure the lip with the tub in the open... My only worry was that the floor isn't level so it would throw of the against the wall measurement but it should be a good starting point

    Thanks!
     
  5. Terry

    Terry Administrator Staff Member

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    If the tub has feet, and it sits level in the space, you won't need the mortar. I use Mortar if the floor isn't level and I need to shim it.
    With a level floor, I sometimes just slide it in, and pin the tile lip with screws after pre-drilling. When the floor isn't level, that's when I consider shims and mortar.
     
  6. chrisexv6

    chrisexv6 Member

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    Thanks again!

    I know the floor is out of level...not a whole lot, but definitely requires that the tub be levelled some other way

    If using a mortar bed for levelling and overall feel purposes (I dont like how acrylic tubs flex), should I not even bother with a ledger? The tub deck is so small (1.5") you would be hard pressed to step on or put anything on it anyway.

    Thanks.

    -Chris
     
  7. hj

    hj Moderator & Master Plumber Staff Member

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    The ledger is NOT to protect against stepping on the tub ledge, it is support the entire tub when someone is in it.
     
  8. chrisexv6

    chrisexv6 Member

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    With feet on the bottom of the tub I wasn't sure if the ledger was there for support. The installation manual doesn't even show installing a ledger, and tech support confirmed I can "if I want to".

    The few tubs I've installed myself never had feet on them, so the ledger was the only thing holding up the side opposite the apron.

    In my case, where the floor is out of level, should I use the ledger to bring the tub into level and the mortar bed to be the final support under the tub once its resting on the ledger?
     
  9. Terry

    Terry Administrator Staff Member

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    That's what I do in that case. Ledger, shims where needed on apron, and mortar. The mortar needs to be placed in piles that can squish outward. You let the tub do the job of determining the depth of the mortar.
     
  10. chrisexv6

    chrisexv6 Member

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    Thanks again, almost there! Tub is ready to be set in, will do it tomorrow morning.

    One last question - for simplicity sake, I only used a ledger on the back wall. Will that suffice? Or should I use them on the end walls as well? One of the end walls I can only get a board about half the width of the tub, because the air inlet is in the way. On the drain end, though, I should be able to get close to full length. I just wasnt sure how important the end walls are compared to the back.

    Thanks.

    -Chris
     
  11. Terry

    Terry Administrator Staff Member

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    I don't ledger the ends. There is all kinds of things happening on the ends, including the overflow.
     
  12. chrisexv6

    chrisexv6 Member

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    All set, the tub is in! Thanks again.

    One last question - installing the drain basket...use putty or silicone? Its an acrylic tub, manufacturer says silicone works better but Ive seen pros and cons of both. Is it just a preference thing?

    Thanks.
     
  13. Terry

    Terry Administrator Staff Member

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    Occupation:
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    I use stainless putty there on acrylic. I don't like Silicone for many reasons.
     
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