Bathtub Installation - General DIY Discussions - DIY Chatroom Home Improvement Forum

Go Back   DIY Chatroom Home Improvement Forum > DIY Forum > General DIY Discussions


Thread Tools Display Modes
Old 07-06-2011, 09:26 AM   #1
Join Date: Apr 2011
Posts: 62
Rewards Points: 75

Bathtub installation

Removed old tub, bought new one. I rearranged/installed the new faucetry piping (going from 3 knob style to single-arm-turn style water control) because this new tub is about 1-2 inches taller and about 1-2 inches further from the wall OC of the drain. This is on a concrete slab.

So the point of time has come where the tub needs to find it's way into the bathroom. It's a 5' by 30" (
This tub has a foam block underneath the tub, on which is rests. It seems that the tub is slightly not level. I keep hearing that "shim it" but, where? The foam block?

So this might sound like a silly question, but where in that space do I install it in order to keep things kosher with the cementboard? Does it need to be "so many inches" from the studs?

When the tub IS placed, and it's time for the cement board to go up: Does the cement board come all the way flush to the tub rim? Or does it rest just above the flange?

Lots of questions I know and thanks in advance!


BoxAlarm is offline   Reply With Quote
Old 07-06-2011, 11:25 AM   #2
Home Remodeler
Join Date: Dec 2007
Location: Port Orchard, Wa
Posts: 243
Rewards Points: 164

I think that foam piece is just for shipping, it will deteriorate under the tub. I put the board over the flange but leave about 1/8 gap between the bottom of the board and tub. I fill that with chalk. Some of the pros will show up and some may have different opinions. Read the directions that come with the tub too. Good luck with your project.


mikey48 is offline   Reply With Quote
Old 07-06-2011, 11:32 AM   #3
Home Remodeler
Join Date: Dec 2007
Location: Port Orchard, Wa
Posts: 243
Rewards Points: 164

Might want to show a picture of that foam pad under the tub. Looked at the installation instructions and it does talk about a pad.
mikey48 is offline   Reply With Quote
Old 07-06-2011, 04:22 PM   #4
Environmental Health
Join Date: Jan 2010
Location: Dallas Area
Posts: 43
Rewards Points: 25

Do read the instructions.

On many I've installed, the foam stayed on. If there was a problem with level the stringer you install will help. I also buy some sand mix (home depot), mix it up and place under the foam feet. Press tub down to level and where it rest on the 2 x 4 stringer.

The tub goes up against the studs. Cement board goes over (covers) the flange that is around the tub, but stays about 1/8 inch from touching the tub. I've chiseled out the studs a touch so that the flange is flush with the 2 X 4 studs. This keeps the cement board from pouching out as it goes over the flange.

Dry fit the tub in the space to make sure the drain is in the right place and is high/low enough to connect.

Read direction on cement board too. Most want you to tape seems and don't want 4 corners meeting up anywhere. Also, you may want to consider putting Redgard or some other water proof paint on membrane on top of the cement board. If you aren't going to put any waterproof paint on membrane ... you will need to put tar paper/plastic sheet on the studs first (going over the flange) and then the cement board.

assuming this will also be used as a shower

Last edited by Dean CRCNA; 07-06-2011 at 04:44 PM.
Dean CRCNA is offline   Reply With Quote

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Stuck on Bathtub Installation trophywalleye Plumbing 13 02-02-2011 02:45 AM
Konecto Installation Tidbit jennydavis Flooring 9 01-06-2009 12:19 AM
Bathtub backerboard installation brucejy Building & Construction 2 10-13-2008 10:03 AM
Preparing to install Kerdi on bathtub surround DIY-Renovator Flooring 18 07-17-2008 10:42 AM
Help with ID'ing bathtub sound... DIY-Gal Plumbing 12 02-10-2007 05:45 AM

Top of Page | View New Posts


Search Engine Friendly URLs by vBSEO 3.6.1