Hardiebacker vs Greenboard

Discussion in 'Shower & bathtub Forum & Blog' started by idoc4u, Mar 16, 2010.

  1. idoc4u

    idoc4u New Member

    Messages:
    83
    Location:
    Indiana
    I have roughed in a shower so that I will put wall board behind the acrylic shower walls as opposed to attaching the shower walls directly to the studs. I believe this will add stability.

    Would it make more sense to use cement board vs greenboard behing the shower walls since I will need to drill a hole for the shower valve and a hole for the shower arm thereby potentially not exposing gypsum to H2O?

    This way if water ever leaked behind the acrylic shower wall surround, it would not damage greenboard. So you'd have stud/cement board/acrylic shower surround/and then greenboard over the flange of the shower wall.

    An alternative idea I have is to use greenboard, but just leave a gap between the studs where the valve is located behind the shower surround. In this case, I wouldn't need to drill any holes since there would be no drywall covering the valve. It would look like: stud/greenboard/surround/greenboard over the sourround flange.

    Thanks for your opions.
  2. krow

    krow Plumber

    Messages:
    906
    Location:
    Ontario, Canada
    IMO, with the acrylic panels, cement board will be an overkill.

    Cover the entire walls with greenboard or blueboard and leave the hole around the shower valve only as if you are going to tile. Then glue the acrylic directly onto your boards.
  3. jadnashua

    jadnashua Retired Defense Industry Engineer xxx

    Messages:
    21,937
    Location:
    New England
    Unless the surround installation instructions call for it, I wouldn't put anything there. Greenboard really isn't much better than normal drywall, and in most (national) codes is no longer approved for damp areas. Having it there may make the edges of the surround difficult to position properly to trim out.
  4. krow

    krow Plumber

    Messages:
    906
    Location:
    Ontario, Canada
    Of course I am refering to the 1/8" shower wall panels. If the walls are rigid and self supporting, then no drywall is required.
  5. Basement_Lurker

    Basement_Lurker One who lurks

    Messages:
    668
    Location:
    Victoria, BC
    Cement board is only used on tile installations to give the tile a proper surface to adhere to, and because grout is porous. The plastic walls you are talking about are not porous, so you don't need to use cement board (and a proper vapour barrier). Your valve trim will seal off any water exposure, and if it doesn't because of improper installation, by the time you have enough water damage from shower spray, you will have bigger problems than soggy drywall...like mold or rot.
Similar Threads: Hardiebacker Greenboard
Forum Title Date
Shower & bathtub Forum & Blog 1/4 HardieBacker Board for Walls? Jul 13, 2013
Shower & bathtub Forum & Blog FIBEROCK Tile Backerboard vs HardieBacker Cement Board Mar 15, 2013
Shower & bathtub Forum & Blog Countersinking Backer-On screws in Hardiebacker? Jan 26, 2009
Shower & bathtub Forum & Blog Drywall or greenboard above shower stall? Aug 8, 2011
Shower & bathtub Forum & Blog Greenboard Okay For Tub Surround? Apr 5, 2011

Share This Page