Ceramic Tile Advice Forums - John Bridge Ceramic Tile

Welcome to John Bridge / Tile Your World, the friendliest DIY Forum on the Internet

Advertiser Directory
JohnBridge.com Home
Buy John Bridge's Books

Go Back   Ceramic Tile Advice Forums - John Bridge Ceramic Tile > Tile & Stone Forums > Tile Forum/Advice Board


Thread Tools Search this Thread
Unread 04-06-2023, 09:59 AM   #166
ss3964spd's Avatar
Join Date: Jul 2005
Location: Fairfax, Va
Posts: 5,819
Send a message via Yahoo to ss3964spd
Will keep my fingers crossed for ya regarding that PT 2X4 pony (knee) wall cap, Mike. In any case you do not want to adhere your granite cap directly to the PT 2X4. You'll need to screw some kind of backer to it first, and water proof the seams were necessary.

I'm guessing you mean Kerdi, not Ditra.

I think it was mentioned before, but per Schluter you cannot adhere Kerdi directly to dimensional lumber.
If I recall correctly my memory is excellent, but my ability to access it is intermittent.
ss3964spd is offline   Reply With Quote
Unread 08-19-2023, 05:41 PM   #167
Registered User
Join Date: Jan 2022
Posts: 99
Jacuzzi tub support

I have an indoor jaccuzzi tub that holds about 80 gallons of water. I originally put sand to support between the floor and the tub, but I'm not satisfied with using the sand. I removed most of the sand and I'm considering either:

1) Mapei flexcolor CQ premixed grout...put in 2.5 gal. ziploc bags. I have many buckets of this that I wasn't able to sell on ebay.

2) Some pieces 2" thick rigid foam insulation.

Which option would be better?
Attached Images
eagle4x is offline   Reply With Quote
Unread 08-19-2023, 08:10 PM   #168
Registered User
Join Date: Oct 2016
Location: Central Virginia
Posts: 612
Can I put in a vote for neither?
80 gal of water gets heavy and fiberglass has a limited flex before it gives up. You might get away with either 1 or 2 for a while, but why tempt fate?
If you have some access, you could put a mortar bed under that tub. Would spread the load over a wider area and would last forever. Another option (similar to your 2nd choice) would be to use a ton of expanding foam under the base. Same thought as the mortar but would have a bit more give to it and be a point load like a foam block. I might lean that way if there was only a few inches of leeway to maneuver with.
Gozo is offline   Reply With Quote
Unread 08-19-2023, 08:17 PM   #169
Moderator -- Mud Man
Davy's Avatar
Join Date: Jan 2003
Location: Princeton,Tx.- Dallas area
Posts: 34,777
I'm voting with Jeff but you have to be careful with expanding foam. A plumber did one for me that raised the tub up too high and I had to tear it out and start over. I like the mortar idea best.

Davy is offline   Reply With Quote
Unread 08-19-2023, 08:47 PM   #170
Veteran DIYer- Schluterville Graduate

STAR Senior Contributor

Join Date: Jul 2004
Location: Nashua, NH
Posts: 15,673
Spray foam comes in at least a few different configurations. If you go that route, use one designed for sealing around windows as it doesn't expand as much, so would be much less likely to stress the tub and try to move it. Some become rigid, some are more flexible. The rigid ones can pulverize when stressed.
Jim DeBruycker
Not a pro, multiple Schluter Workshops (Schluterville and 2013 and 2014 at Schluter Headquarters), Mapei Training 2014, Laticrete Workshop 2014, Custom Building Products Workshop 2015, and Longtime Forum Participant.
jadnashua is online now   Reply With Quote
Unread 08-20-2023, 10:00 AM   #171
Moderator -- Mud Man
Davy's Avatar
Join Date: Jan 2003
Location: Princeton,Tx.- Dallas area
Posts: 34,777
I might add that the tub I mentioned was filled with water to hold it down to the tub deck but the drain didn't seal off well so it was slowly seeping without anyone knowing. It all drained out during the night and was 1/2 inch up off the tile deck in the morning. The plumber said it was triple expanding foam. It definitely would have had a better chance of staying put had the water stayed in the tub. But I still avoid the foam that's made for wide gaps.

Davy is offline   Reply With Quote

Stonetooling.com   Tile-Assn.com   National Gypsum Permabase

Thread Tools Search this Thread
Search this Thread:

Advanced Search

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
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Mark's shower project with hot mopped pan and cast iron shower drain halfdome Tile Forum/Advice Board 20 05-03-2017 01:20 PM
New Bathroom project - marble tile shower/shower floor question! mattymo317 Tile Forum/Advice Board 7 12-08-2015 06:13 PM
Steve's Kerdi shower Project(s) (UPDATE - Uh Oh... Shower leak) LIJetsFan Tile Forum/Advice Board 75 09-21-2011 02:17 PM
Vic's shower project surgeon Tile Forum/Advice Board 156 03-07-2010 08:17 PM
Tub/shower project tmppgh Tile Forum/Advice Board 6 09-12-2008 07:58 AM

All times are GMT -6. The time now is 10:19 PM.


Powered by vBulletin® Version 3.7.4
Copyright ©2000 - 2023, Jelsoft Enterprises Ltd.
Copyright 2018 John Bridge & Associates, LLC