Expanding Foam

Discussion in 'Plumbing Forum' started by AWD_GS, Feb 15, 2015.

Help Support House Repair Talk by donating:

  1. Feb 15, 2015 #1

    AWD_GS

    AWD_GS

    AWD_GS

    Well-Known Member

    Joined:
    Jan 19, 2015
    Messages:
    71
    Likes Received:
    5
    Has anyone ever used expanding foam for tub support? I have a jacuzzi tub and the support is not great. It cracked once and I repaired the crack but looking to support it more. Would expanding foam be the best to spray under to help support any weak spots? If so, what type of expanding foam? I see there's several different kinds.
     
  2. Feb 15, 2015 #2

    bud16415

    bud16415

    bud16415

    Fixer Upper Staff Member Admin Moderator

    Joined:
    Feb 5, 2013
    Messages:
    5,322
    Likes Received:
    1,880
    Location:
    Erie, PA
    Guys around here mix a bag of ready mix concrete kind of dry and toss it down and set the tub into it.


    I put in a cheap shower once and it felt bendy and I shot a can of great stuff in under the crack at the floor and it helped.
     
  3. Feb 15, 2015 #3

    AWD_GS

    AWD_GS

    AWD_GS

    Well-Known Member

    Joined:
    Jan 19, 2015
    Messages:
    71
    Likes Received:
    5
    Yea everything I saw recommended that but unfortunately the tub is already set so was curious if anyone has use the expanding foam as a second option. How did it hold up for you?
     
    Last edited: Feb 16, 2015
  4. Feb 16, 2015 #4

    frodo

    frodo

    frodo

    Senior Member

    Joined:
    Aug 5, 2008
    Messages:
    3,066
    Likes Received:
    1,196
    problem with foam, it breaks down after time.

    I have done this before on a set tub

    build a wood form, mix up some concrete, soupy mix, using a card board box as a funnel pour the crete under the tub
    into your form.

    as it sets up. pack the crete tightly so that it is supporting the tub


    the correct way, pull the tub, set in a motor bed
     
  5. Feb 16, 2015 #5

    nealtw

    nealtw

    nealtw

    Contractor retired

    Joined:
    Nov 4, 2010
    Messages:
    24,706
    Likes Received:
    3,362
    Location:
    Chiliwack BC Canada
    I think there are foams that will work but i doubt they come in a can.
     
  6. Feb 16, 2015 #6

    bud16415

    bud16415

    bud16415

    Fixer Upper Staff Member Admin Moderator

    Joined:
    Feb 5, 2013
    Messages:
    5,322
    Likes Received:
    1,880
    Location:
    Erie, PA
    It held up fine when I tried it. the shower I put in was what they call a garage shower or hunting camp shower and I put it in the basement tied into the washer sump as a quick thing as I was tearing out the only bathroom in our house. 20 years later I never took it out and it’s really been nice to have. In my case it firmed it up ok and never seemed to go down. I shot it in from every side.
     
  7. Feb 16, 2015 #7

    havasu

    havasu

    havasu

    Guest

    Some of those foams in a can are known to expand many times. I'd be afraid that the tub would pop out if not properly done.
     
  8. Feb 16, 2015 #8

    bud16415

    bud16415

    bud16415

    Fixer Upper Staff Member Admin Moderator

    Joined:
    Feb 5, 2013
    Messages:
    5,322
    Likes Received:
    1,880
    Location:
    Erie, PA
    When they first came out they would expand and jam windows shut etc. The great stuff I have used in the last ten years just fills the space with no outward pressure. I would give it a day to cure before I tried putting any weight on it.
     
  9. Feb 16, 2015 #9

    AWD_GS

    AWD_GS

    AWD_GS

    Well-Known Member

    Joined:
    Jan 19, 2015
    Messages:
    71
    Likes Received:
    5
    Everything I've read was to use low expanding foam and to fill the tub prior to using to account for weight. Once it dries then drain tub.

    I did contact a professional and he mentioned using the spray foam which never dawned on me. I assume there is something out there and I would have no problem paying him but I find it hard to pay someone $500 to just spray some foam under the tub
     
  10. Feb 16, 2015 #10

    nunyabiz1

    nunyabiz1

    nunyabiz1

    Well-Known Member

    Joined:
    Oct 30, 2014
    Messages:
    102
    Likes Received:
    29
    You need something like this, still cost about $300 though.

    http://www.tigerfoam.com/

    Foam is great but they are clearly making about 1000% profit on it.
     

Draft saved Draft deleted

Share This Page

Group Builder