Acrylic shower Base ( cold 36x60

Discussion in 'Shower & Bathtub Forum & Blog' started by royerm, Jan 9, 2013.

  1. royerm

    royerm Member

    Messages:
    92
    Location:
    Quebec, Canada
    Hi Folks...

    As I'm preparing for a new shower install in the basement I decided
    to bring the acrylic base from the garage to see approximately where
    the drain would end-up etc etc etc....

    It was standing up right in the cardboard in the garage and
    when I put it on the floor I noticed it was curved a bit on both axes,
    the middle being the most protruded on the 4 sides.

    I'm keeping it inside for the night to see if it will straighten-up..

    Any comments???? is this normal???

    Regards
  2. Terry

    Terry Administrator Staff Member

    Messages:
    15,298
    Location:
    Bothell, Washington
    Well............it's made in a mold and then pulled off. Nothing is perfect in construction. That's why they make shims.
    Sometimes it's good enough, and sometimes not.
    Most tubs, if you are looking at the line that meets the floor, those bow a bit too.
  3. royerm

    royerm Member

    Messages:
    92
    Location:
    Quebec, Canada
    Thx Terry....Do you think that temperature can have an effect on it????
  4. Terry

    Terry Administrator Staff Member

    Messages:
    15,298
    Location:
    Bothell, Washington
    I would need a picture. I know that black ABS pipe left in the sun will curve when one side is warmer than the other.
  5. royerm

    royerm Member

    Messages:
    92
    Location:
    Quebec, Canada
    Terry and all...

    I ended-up leaving the base sit in one of the bedroom that has floating floor that is
    pretty much levelled and with a bag(40lbs) of wood pellet in each corner for a day.
    After removing the bags and leaving it alone for a day, the sag is very small now
    and with the weight of the shower door sitting on it I'll be fine...
    Cheers
  6. johnfrwhipple

    johnfrwhipple Bathroom Design & Build - North Vancouver, B.C.

    Messages:
    4,711
    Location:
    North Vancouver, BC
    Or you can scratch the back side of the shower pan with a razor blade a million times. Use a slurry coat of something sticky like Laticrete 254, Ardex X77, Mapei Grani Rapid, Custom Mega Lite and then drop it on a mortar mix base that went down over the same slurry coat. Tap it into perfect placement. Weight it and know for sure it is rock solid.

    Any pre-made base we see installed with out this added work just feels weak under foot.

    JW
  7. royerm

    royerm Member

    Messages:
    92
    Location:
    Quebec, Canada
    Thx John....another excellent idea..

    Does the mortar mix base actually stick/glue to the back side?????

    Regards....
  8. jadnashua

    jadnashua Retired Defense Industry Engineer xxx

    Messages:
    22,266
    Location:
    New England
    WHen using the materials listed (modified thinsets), yes, it will stick...it would be like setting the thing like a big tile. You only get one chance to get it right, and when it comes time to replace it, you might have to replace the subflooring.
  9. royerm

    royerm Member

    Messages:
    92
    Location:
    Quebec, Canada
    UPDATE UPDATE......

    2 days later now and I noticed that the sag is not only on the bottom
    of the base but more evident on the top part.

    I've send a picture to the store owner and he has agreed to exchange.
    I Have join the picture, not the best photographer ;) the bottom of the base
    is against the door... IMG_3133.jpg
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