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Old 07-02-2010, 10:56 PM   #1
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Installing tile over painted sheetrock


Is it OK to install tile over painted sheetrock, without using the backer board? The area to be tiled is a bathroom tub enclosure (and the walls around it). Do they make waterproof glue & grout? I just want to be sure I don't have water seeping through to the sheetrock if I do this.

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Old 07-03-2010, 01:51 AM   #2
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Installing tile over painted sheetrock


i'm curious to see what some of the tile pros on here say. generally it's okay in a kitchen when it's only cosmetic. my worry with a bathroom is impact from cleaning, wear and tear etc is going to crack the grout a little too easy. i've also seen tile backer sheetrock but have no clue how it compares. maybe bud or one of the other really good tile guys can help out.

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Old 07-03-2010, 06:52 AM   #3
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Installing tile over painted sheetrock


Hi there,Sorry it took so long to get you an answer----

No to all of your questions.

Drywall and green board are not allowed in a wet area, I recommend Durrock.

Use a modified thimset (powdered--you will need to mix it with a drill)

Even the best grouts are not 'waterproof' moisture will get through in tiny amounts.
Epoxy grouts are the closest thing to waterproof--however a house moves a bit throughout the year and tiny cracks can appear over the years.

---Mike--
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Old 07-03-2010, 02:56 PM   #4
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Installing tile over painted sheetrock


Quote:
Originally Posted by oh'mike View Post
Hi there,Sorry it took so long to get you an answer----

No to all of your questions.

Drywall and green board are not allowed in a wet area, I recommend Durrock.

Use a modified thimset (powdered--you will need to mix it with a drill)

Even the best grouts are not 'waterproof' moisture will get through in tiny amounts.
Epoxy grouts are the closest thing to waterproof--however a house moves a bit throughout the year and tiny cracks can appear over the years.

---Mike--
Ok so I am rethinking the tile now. Could I just paint another layer of semi-gloss and put something waterproof on top of that?
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Old 07-03-2010, 03:20 PM   #5
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Installing tile over painted sheetrock


There are glue on plastic tub surrounds--Look kind of tacky though.

Removing the drywall in the area to be tiles and replacing with Durrock should not be to difficult--

You don't need to rock the walls all the way to the ceiling ,so no taping is required.

Often the drywall is removed to 6 feet above the tub flange--(Durrock comes in 3'x5' sheets.)

Some people go to 5' on the side walls. I,like to go higher.
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