Ask Experts Questions for FREE Help !
    dherman1's Avatar
    dherman1 Posts: 129, Reputation: 10
    Junior Member

    Dec 8, 2005, 09:34 AM
    Building a tub deck and shower enclosure
    Greetings, I am not sure if this s/b in this section or in plumbing, so I will post it in both.

    We are adding a whirlpool tub to our bathroom addition and it requires a tub deck.

    The exterior walls are all framed and insulated (Icynene).

    Should I rock the walls first and then build the support deck on top of the drywall? (Hopefully this is the right way as the wall is already rocked).


    Should I cut out the rock to attach the framing members directly to the studs?

    Should I have used cement board instead of drywall? (The drywall is DensArmor Plus if that makes a difference)

    Now for the shower enclosure. I am forced to use a mudbed as I can't move the existing drain. So...

    For the walls, should I use an EPDM membrane behind the cement board (hardie board)? I have found a good link for how to build the mudbed for the shower pan which will use an EPDM membrane.

    As always, thanks for your help.

    skiberger's Avatar
    skiberger Posts: 562, Reputation: 41
    Senior Member

    Dec 8, 2005, 02:19 PM
    You can attach the framing members against the rock. Use 3" screws. Dont forget an access door for the pump & electricals on the side of the framing deck. Depending what kind of tub, they usually rest also on the floor and not just suspended by the tub deck. You dont need cement board on the walls around the tub. Your walls shouldnt be getting wet sitting in the tub.
    As for the shower, you dont need EPDM up the whole walls, just up the 3" up from the shower curb, 6" above floor in showers w/o curbs. Make sure you seal the Hardiboard joints & corners w/ fiberglass mesh tape and thinset compound you'll use to set the tile. If the joints are extremely tight, you can use flexible caulking @ the joints. The Tile Council web site is

Not your question? Ask your question View similar questions


Question Tools Search this Question
Search this Question:

Advanced Search

Add your answer here.

Check out some similar questions!

Building new shower with glass block [ 5 Answers ]

I would like to build a new 36' x 48" shower with glassblock on 1 1/2 sides, no shower door and tile on the other 2 walls. My question is: Is it best to buy a premade shower pan that is strong enough to hold the weight of the glass block on the caps or build my own? If prefab, any recommendations;...

4 Piece Shower Enclosure [ 3 Answers ]

I am in the process of installing a bathroom in my new garage addition, and am seeking input for the 36" Sterling shower enclosure. 1) Instruction state that back and side walls can be attached to bare studs or over water resistant wall board. Any opinions on which is best? 2) The base I plan to...

4 Piece Shower Enclosure [ 3 Answers ]

"Do they make a drain receptor with female threads on the inside that could be glued to the 2" pipe afer the base is set, and with the drain grate screwing into that?" They do but I'm not too sure you can use it on a manufactured shower base. It's called a "flange type shower drain", (see image)...

Building a pre-slope for a shower pan [ 4 Answers ]

I used sand mix (with acrylic fortifier) for the pre-slope I built for a new shower pan. After the mortar sets up(two days later) I checked the surface by knocking on it with a stick, I heard hollow ring instead of solid thud in some spots. What does this mean? The material in the spots where I...

View more questions Search