Bathroon reno, tiles, mold issue - Router Forums
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post #1 of 12 (permalink) Old 04-25-2012, 11:16 AM Thread Starter
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Default Bathroon reno, tiles, mold issue

Dear fellow diy-ers,

I am renovating my master bathroom next week and would like some tips on particular things.*

I currently have a very nice bathtub liner. I would like to keep the bathtub as is, without replacing it. What I am very excited to do though is remove the ugly, out dated plastic liner panels that are on the walls around the bathtub. I would like to tile those walls instead.

My question, and concern is what will I find behind those plastic panels once I take them down? I currently have a very slight mold problem that is in a 'dot' pattern on the ceiling above the bathtub. My guess is, either there is some water damage behind the wall panels, or perhaps very poor ventilation (my bathroom vent is very old and is one of the things that I plan to replace during this reno).*

The mold can easily be wiped off, but it just comes right back in a few weeks. There currently is no heavy mold spots where it affected the surface of the ceiling.

I also have a slight mold spot on the front side edge of the bathtub (where the bathtub meets the wall.*

Questions that I have:

How do I best remove the mold off the ceiling and on the side of the bathtub where it meets the drywall? Any sealants/protectors that you can recommend?
Are the plastic wall panels usually glued down on top of drywall?
When I take down the panels, if there is water damage, should I replace all of the drywall around the bathtub?
For the tiling, do I even need the drywall? Or can I rip it down to studs and just slap cement backerboard on it for the tiles?*
When I do this, do you recommend taking out the bathtub completely? Especially if there is water damage?
What is your advice to ensure very good moisture proof and waterproof renovation, when it comes to tiling around the bathtub?

I apologize for so many question. Any help will be very much appreciated! Thankyou inadvance.
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post #2 of 12 (permalink) Old 04-25-2012, 11:41 AM
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Hi Eva, welcome!
Not necessarily all or in order...
If you're going to all the trouble of taking down the liner, and you already have mould, my first thought is gut the bathroom and start with a clean slate. The benefit is that you will know for certain that you've removed the mould and that there's no rot in the tub surround framing, or if there is, you can fix it.
I'd suggest for sure that you remove the ceiling drywall. All the new board should be designated for damp locations (the stuff up here is coloured green).
-new fan with, a humidistat control...it'll run until the humidity is down to a normal level (or a timer...set for a 1/2 hour following a shower)
-absolutely use cement backerboard for the tub surround; don't even think about using any kind of drywall.
-I always seal my backerboard with a couple of coats of acrylic additive. It adds about 400% bonding strength to the thinset tile mortar and it won't support mould growth.
- I strongly suggest you hire a drywall installer rather than trying to do the boarding yourself. It isn't expensive for a bathroom and you really won't enjoy the experience of working in a small room!
-unless you're a very experienced tiler, farm that out as well...but make sure you've seen the guy's work and that he comes recommended (if he's Italian, even better! )
-This is a perfect opportunity to upgrade the bathroom waterlines, shutoffs, and fixtures.
You'll kick yourself if your waterlines develop a small leak after you've gone to all this trouble and expense.
Good luck on the Reno, Eva.
Cheers,
-Dan
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post #3 of 12 (permalink) Old 04-26-2012, 06:02 AM
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Default Mould problem

Hi Eva ,

For your mould problem you buy a bottle oil of cloves and also 1 litre spray bottle .
You put a quarter of a teaspoon of oil of cloves no more into 1 litre spray bottle of
water . Just mist it over the mould areas don't wipe it off you just leave to dry and
in a few you should see it flaking off then you can wipe it off . The oil of cloves will
kill the mould spores and stops it from growing . I hope that helps .

Cheers Graham .
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post #4 of 12 (permalink) Old 04-26-2012, 06:18 AM
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Hi Eva:

We've also run into a mold problem in this house. When I was researching it, I spoke with microbiologists at Université Laval and the best suggestion was soap and water. That's soap, as in made with sodium hydroxide (Lye) and oil. Just wash it with a cloth and soap and water. Lots of lather and foam. The trick is to remove and kill it without it releasing spores. Spraying and other applications will allow it to release spores. The foam from the soap and water will capture any spores that are released. To remove the stain, a strong chlorine bleach solution works well but wear dangerous chemicals protection, i.e. gas mask with good filters.

Allthunbs
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post #5 of 12 (permalink) Old 04-26-2012, 06:58 AM
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As a contractor I would not do the job without gutting the drywall. I do not want the liability of the mold. But its your home

Learning is an exciting adventure
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post #6 of 12 (permalink) Old 04-26-2012, 07:14 AM
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First thing is the mold on the ceiling. This is very simple to deal with, wash it off with bleach then paint the ceiling with Zinzar (not sure of the spelling but they make BIN also)ceiling paint. It stops mold for 5 years and it really does work. As far as the tub goes if the tub and wall covering were sold as a unit then you can't simply tear off the wall material and tile. These types of units have a special edge built into the tub to accept the wall material. If you find that once you tear it off it is possible to tile then I would rip the wall board off and start from scratch with new cement board. Gutting the whole bathroom is not necessary
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post #7 of 12 (permalink) Old 04-26-2012, 10:52 AM
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My sentiment exactly.
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post #8 of 12 (permalink) Old 04-26-2012, 10:53 AM
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Oops, that last comment was in reference to PADUKE's statement.
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post #9 of 12 (permalink) Old 04-27-2012, 06:37 AM
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Quote:
Originally Posted by paduke View Post
As a contractor I would not do the job without gutting the drywall. I do not want the liability of the mold. But its your home
I've got to agree with you Bill.

What I'm doing in my home is remove visible mold, determine - then rectify the cause, search and remove hidden mold, reconstruct and refinish as necessary.

I found the "rectify" step the most problematic.

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post #10 of 12 (permalink) Old 04-27-2012, 06:32 PM
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Mold in a room, any room, may be caused by a lack of ventilation. A bathroom in particular must have a good fan system removing damp air to the the outside. The fan should be on a timer so that it runs at least 30 minutes from shower beginning to end. A renovation that doesn't include ventilation will be a disappointment in my opinion.
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