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Old 01-24-2014, 04:21 PM   #1
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Shower Tile Grout Cracking - Mold


New homeowner here. One of my bathrooms has a bathtub shower with tile on the walls.

As you can see in the photo below, the tile grout is old and crumbling. There are a few places where the grout is completely gone and there appears to be black mold growing.



My thought is to spray all this with bleach, cut out the old grout where needed and re-grout.

Does this sound about right?

My bigger concern is if the mold has spread to behind the tile or the tub. Even the caulk job on the tub was done half ass by former owner.

My other concern is if there's moisture behind the tiles/tub right now and when I seal everything up with new grout and caulk that I'm going to cause more mold issues.

Any helpful tips would be much appreciated.

Thanks!
Marc

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Old 01-24-2014, 04:45 PM   #2
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Shower Tile Grout Cracking - Mold


Push in on the tiles to see if any are loose.
Tap on them to see if they sound hollow.
It was very common years ago to just go over drywall with the tiles.
Once someone does not maintain the grout the drywall soaks up the water like a sponge and the tile is shot.
Grout needs to be sealed, it's by it's self is not waterproof.

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Old 01-24-2014, 04:58 PM   #3
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Shower Tile Grout Cracking - Mold


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Originally Posted by joecaption View Post
Push in on the tiles to see if any are loose.
Tap on them to see if they sound hollow.
It was very common years ago to just go over drywall with the tiles.
Once someone does not maintain the grout the drywall soaks up the water like a sponge and the tile is shot.
Grout needs to be sealed, it's by it's self is not waterproof.
None seem lose although there are a few that have fallen off the ceiling section right on the edge. Because they were on the edge you can see what was under them and looks like drywall. See photos:

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Old 01-24-2014, 05:18 PM   #4
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Shower Tile Grout Cracking - Mold


That is an old tile job--over drywall--Joe is right--it's starting to fail--

To buy some time you could remove the loose grout and regrout the stall--but when I see grout in that condition I usually find a moldy backer board when it is demolished.

Start saving up for a new tile job----
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Old 01-24-2014, 05:27 PM   #5
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Start saving up for a new tile job----
haha yea I'm working on it. i can't wait to take a sledgehammer to this entire bathroom
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Old 01-24-2014, 05:47 PM   #6
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I is nice to have an up to date bathroom---Is that the only bathroom in the house?
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Old 01-24-2014, 07:34 PM   #7
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Shower Tile Grout Cracking - Mold


That does not look like it's over drywall to me. Looks like perfectly fine cement board to me.
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Old 01-25-2014, 05:33 AM   #8
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Shower Tile Grout Cracking - Mold


That is from the 1960s---maybe earlier---in those days the gyp board used in showers was gray---that is not cement board--just vintage paper faces gyp board.
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Old 01-25-2014, 08:02 AM   #9
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I is nice to have an up to date bathroom---Is that the only bathroom in the house?
This is our main bathroom which we're planning to redo sometime in the next 2 years. Until then, I just wanted to be sure we're not creating serious water or mold issues with these cracks.
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Old 01-25-2014, 09:32 AM   #10
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That's new to me.
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Old 01-26-2014, 05:37 AM   #11
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A package of grout---and a utility knife----and a sponge---that's about all you need to get a bit more time---clean out the moldy grout with the knife---regrout ---and keep setting aside money for that bath remodel---

You will learn a lot reading threads here---even if you hire out the work--the knowledge will help you choose the best affordable options.

Jeff---I'm old--old as that grey backer board---it's just a matter of time before you tear out one of those----
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Old 01-26-2014, 06:55 AM   #12
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Quote:
Originally Posted by oh'mike View Post
A package of grout---and a utility knife----and a sponge---that's about all you need to get a bit more time---clean out the moldy grout with the knife---regrout ---and keep setting aside money for that bath remodel---

You will learn a lot reading threads here---even if you hire out the work--the knowledge will help you choose the best affordable options.

Jeff---I'm old--old as that grey backer board---it's just a matter of time before you tear out one of those----
Thanks Mike. So I don't have to worry about sealing up moisture and creating more mold problems for myself with the new grout?
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Old 01-26-2014, 07:01 AM   #13
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Grout breaths---it is not waterproof---water permeable is the word---

this is why a modern shower should have the backer waterproofed with a membrane--paint on or sheet--so the moisture that does work its way past the tile and grout will not soak into the backer and cause mold---

You are doing a 'perfume on a pig' job to get a little more time out of a failing wall----at this point---regrout it---re caulk the corners and tub edge and start saving money----it's way past it's useful life---
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Old 01-26-2014, 07:18 AM   #14
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Thanks everyone!
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Old 01-26-2014, 10:02 AM   #15
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Shower Tile Grout Cracking - Mold


From experience, it was less frustrating for me when I ripped out the old and installed new cement board, used Hydro Ban and tiled. I did the grout cut out and regrout on it before. What a PITA.

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