Damaged Subfloor By Tub - Flooring - DIY Chatroom Home Improvement Forum


Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > Flooring

CLICK HERE AND JOIN OUR COMMUNITY TODAY...IT'S FREE!

Reply
 
Thread Tools Display Modes
Old 02-07-2013, 08:35 PM   #1
Member
 
Join Date: Nov 2009
Location: Orange County, California
Posts: 581
Rewards Points: 500
Default

damaged subfloor by tub


I would greatly appreciate suggestions as to what to do about this.

I found the damage when I pulled back a section of baseboard that abutted the lowest tile along the head of the shower/tub wall. It had some black mold or something on its surface.

When I pulled the base board back the lowest wall tile came loose. I was able to extricate it without damaging the tile and hope to glue it back in place.

The first thing I found was that a nail driven through the hardie backer. The board was crushed and the chipboard under it was broken up. The fibres of the exposed part of the chipboard was loose. (The tile didn't run all the way up against the wall.)

The crushed area of hardie board came right up along with pieces of the underlaying chip board as well as parts of chipboard that had been between the edge of the tile and inner wall.

What should I do?

A. I believe that the hardie backer should be attached to the chipboard with thin set. If so, should I be able to cut the hardie board back farther than the chipboard so as to offset any seam? I would do so by cutting a line just the depth of the hardie board.

B. If the hardie board cannot be be removed as in A, I guess I have no choice but to go in though the first floor ceiling. Should I do this regardless to better assess any leaks or problems beneath the tub?

I would like to affect the repair with as little expense and work as possible, but want it done reasonable well.

Pictures and a schematic are uploaded.
Attached Thumbnails
damaged subfloor by tub-flooring-016.jpg   damaged subfloor by tub-flooring-011.jpg   damaged subfloor by tub-flooring-013.jpg   damaged subfloor by tub-flooring-014.jpg   damaged subfloor by tub-floor2-001.jpg  

damaged subfloor by tub-flooring-plan.jpg  

Advertisement


Last edited by Klawman; 02-07-2013 at 09:04 PM.
Klawman is offline   Reply With Quote
Old 02-07-2013, 08:39 PM   #2
Member
 
Join Date: Nov 2011
Location: Hartfield VA
Posts: 27,797
Rewards Points: 710
Default

damaged subfloor by tub


Can you back up and take another so we can see somthing besides a hole?

Advertisement

joecaption is online now   Reply With Quote
Old 02-07-2013, 08:52 PM   #3
Member
 
Join Date: Nov 2009
Location: Orange County, California
Posts: 581
Rewards Points: 500
Default

damaged subfloor by tub


Sorry that those pics didn't show much. I added a couple more for what they are worth.
Klawman is offline   Reply With Quote
Old 02-07-2013, 10:23 PM   #4
Member
 
Join Date: Nov 2011
Location: Hartfield VA
Posts: 27,797
Rewards Points: 710
Default

damaged subfloor by tub


If you want this done right your looking at a total gut job.
The floor and the walls shot.
Also going to have to add some blocking under that floor to support it.
joecaption is online now   Reply With Quote
Old 02-07-2013, 10:38 PM   #5
Member
 
Join Date: Nov 2009
Location: Orange County, California
Posts: 581
Rewards Points: 500
Default

damaged subfloor by tub


Not what I wanted to hear, JoeCaption, but pretty much what I thought may be the case. By a total gut job, I guess you mean tearing up the tiles, hardie board, and chipboard and then replacing or repairing joists as needed. Do you think the tub has to be pulled? I was thinking that I can access what is going on there, and with the plumbing, if I cut into the ceiling below.

How did you conclude that the walls are trashed. I don't think they can be seen in those pics and they look okay from what I can see - so far.

Possibly your experience and the fact that water that got into the chipboard lilkely seeped down the wall.
Klawman is offline   Reply With Quote
Old 02-07-2013, 11:03 PM   #6
Member
 
Join Date: Nov 2011
Location: Hartfield VA
Posts: 27,797
Rewards Points: 710
Default

damaged subfloor by tub


Going to ahve to climb under the house to see just how far it's rotted.
Looks like I can see where waters been running down the floor jost.
joecaption is online now   Reply With Quote
The Following User Says Thank You to joecaption For This Useful Post:
Klawman (02-08-2013)
Old 02-08-2013, 01:41 AM   #7
Member
 
Join Date: Nov 2009
Location: Orange County, California
Posts: 581
Rewards Points: 500
Default

damaged subfloor by tub


Quote:
Originally Posted by joecaption View Post
Going to ahve to climb under the house to see just how far it's rotted.
Looks like I can see where waters been running down the floor jost.
Three things.

I won't be climbing under the house. I wish. This is on the second story of stucco house built on a slab, which means I have to open some walls or a ceiling to see better what is going on.

I think I see what you mean by the water stains, the whitish mineral stains. I have tested them with by trying to shove a screwdriver into the wood and cannot find any dry rot, which is not to say that I shouldn't open the ceiling up below the problem area to check things more carefully.

Lastly, I erred when I said that the joists run parallel to the tub. I was looking at what I call a block. The joist in the photos runs perpindicular to the tub and where the block appears to be a 2X7 the joist looks to be a 2x8. (Romex that isn't viewable in those pictures runs under the 2X7)

Did I say that I appreciate you giving me your advice? Thank you.

Last edited by Klawman; 02-08-2013 at 02:44 AM.
Klawman is offline   Reply With Quote
Old 02-08-2013, 06:03 AM   #8
DIY staff

 
Join Date: Sep 2009
Location: Kane county,Illinois
Posts: 22,334
Rewards Points: 3,306
Default

damaged subfloor by tub


Klawman---That is a frequent sighting----a fix can be done without to much work--

If you own a Multi-tool you could have that fixed in a few hours.

first cut back the hardi board 2 to 3 inches from the tile---remove that--

Then cut the OSB out an inch or two from the remaining backer board----

You need a screwing surface---so leave a border at the tub,also--

Using a strong builders adhesive ,like PL Premium, glue in some 2x4 blocking to support a new piece of subfloor---Pin it into place with screws---

Add the new sub floor using glue and screws.

Replace the missing Hardi board---use some thinset under it---

Replace the tile----

That will do----until it's time for an entire bath floor----a magnetic shower curtain might help prevent that "escaping water' damage---
__________________
New members: Adding your location to your profile helps in many ways.--M--
oh'mike is online now   Reply With Quote
The Following User Says Thank You to oh'mike For This Useful Post:
Klawman (02-08-2013)
Old 02-08-2013, 01:08 PM   #9
Member
 
Join Date: Nov 2009
Location: Orange County, California
Posts: 581
Rewards Points: 500
Default

damaged subfloor by tub


Quote:
Originally Posted by oh'mike View Post
Klawman---That is a frequent sighting----a fix can be done without to much work--

If you own a Multi-tool you could have that fixed in a few hours.

first cut back the hardi board 2 to 3 inches from the tile---remove that--

Then cut the OSB out an inch or two from the remaining backer board----

You need a screwing surface---so leave a border at the tub,also--

Using a strong builders adhesive ,like PL Premium, glue in some 2x4 blocking to support a new piece of subfloor---Pin it into place with screws---

Add the new sub floor using glue and screws.

Replace the missing Hardi board---use some thinset under it---

Replace the tile----

That will do----until it's time for an entire bath floor----a magnetic shower curtain might help prevent that "escaping water' damage---

That is pretty much what I had been thinking can be done, unless the damage is more extensive than it looks from the small hole opened up. Especially given it is located in a corner which is never stepped on.

By a multi tool I suppose you mean something like a rotozip. I have a Dremel, which is like a rotozip on tranquilizers, but it should get this small job done. I may even treat myself to a sawsall, which is something I could have used long ago, just to make it easier to get in close to the tub and walls.
Klawman is offline   Reply With Quote
Old 02-08-2013, 03:18 PM   #10
Member
 
Join Date: May 2012
Location: Sarasota,Florida
Posts: 1,633
Rewards Points: 1,164
Default

damaged subfloor by tub


This is what he means.


http://www.sears.com/fein-power-tool...&blockType=G10
Canarywood1 is offline   Reply With Quote
The Following User Says Thank You to Canarywood1 For This Useful Post:
Klawman (02-08-2013)
Old 02-08-2013, 03:19 PM   #11
Member
 
Join Date: Jan 2013
Location: Southeastern MA
Posts: 1,450
Rewards Points: 564
Default

damaged subfloor by tub


If the tile is on Hardie board, be sure to use a dust mask when you cut it out. The dust it generates is not good for you.
djlandkpl is online now   Reply With Quote
The Following User Says Thank You to djlandkpl For This Useful Post:
Klawman (02-08-2013)
Old 02-08-2013, 05:05 PM   #12
Member
 
Join Date: Nov 2009
Location: Orange County, California
Posts: 581
Rewards Points: 500
Default

damaged subfloor by tub


Quote:
Originally Posted by Canarywood1 View Post
Thanks, Canarywood. I just got back from HD. They don't carry Fein, but I don't need Fein quality. Theirs are all $99, albeit Rigid, Milwaukee or whatever.
Klawman is offline   Reply With Quote
Old 02-08-2013, 05:06 PM   #13
Member
 
Join Date: Nov 2009
Location: Orange County, California
Posts: 581
Rewards Points: 500
Default

damaged subfloor by tub


Quote:
Originally Posted by djlandkpl View Post
If the tile is on Hardie board, be sure to use a dust mask when you cut it out. The dust it generates is not good for you.

That is a good idea. I don't need health problems.
Klawman is offline   Reply With Quote
Old 02-08-2013, 06:02 PM   #14
Member
 
Join Date: May 2012
Location: Sarasota,Florida
Posts: 1,633
Rewards Points: 1,164
Default

damaged subfloor by tub


Quote:
Originally Posted by Klawman View Post
Thanks, Canarywood. I just got back from HD. They don't carry Fein, but I don't need Fein quality. Theirs are all $99, albeit Rigid, Milwaukee or whatever.

I didn't mean to promote Fein,just used the first thing i saw as an illustration.
Canarywood1 is offline   Reply With Quote
Old 02-09-2013, 04:39 PM   #15
Member
 
Join Date: Nov 2009
Location: Orange County, California
Posts: 581
Rewards Points: 500
Default

damaged subfloor by tub


Quote:
Originally Posted by Canarywood1 View Post
I didn't mean to promote Fein,just used the first thing i saw as an illustration.
I am ready to buy a oscillating multi tool, but have one question which is will they cut the Hardie BackerBoard? I will use a dust mask.

Advertisement

Klawman is offline   Reply With Quote
Reply

Tags
bathroom , leak below tub , tile


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
How do I remove part of the damaged subfloor? ChEMom Flooring 17 07-15-2011 01:28 PM
Water damaged underlay kimchee Carpentry 1 05-16-2011 09:20 AM
Replacing Termite Damaged Sill, Joists, and Girders bd_dc Building & Construction 0 02-02-2010 12:21 AM
Damaged fascia (Pics) timcsi Roofing/Siding 7 09-15-2009 11:00 AM
How to Repair Spot Damaged Carpet jrguy Flooring 1 08-25-2009 07:45 AM




Top of Page | View New Posts