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efinneg2

09:03AM | 09/08/05
Member Since: 09/07/05
3 lifetime posts
Bvflooring
We have one-piece fiberglass tub/shower units in our bathrooms, but they're only about 6 feet high, leaving about 1 and 1/2 feet of painted wall above. The wallboard has been replaced twice now because the splashing water causes the paint to peel and the board eventually deteriorates. The last repair was a year ago, and the paint is already starting to pop up again. Can I cover the board, before it starts to deteriorate, with tile? If so, how do I prepare the surface?

Tileguybob

06:15PM | 09/08/05
Member Since: 07/03/05
283 lifetime posts
If not too much trouble, take down the drywall and replace with 1/2" cement board, then set the tile in modified thinset. Leave a 1/8" gap between the tile and the top of the one piece, fill that with caulk in the same color as the grout. Do the same along the ceiling.

efinneg2

07:36AM | 09/10/05
Member Since: 09/07/05
3 lifetime posts
Thanks, Tileguy. Actually, this last time, what was used was 1/2 inch greenboard -- "moisture-resistant gypsum core, water repellent surface". So I think (and I hope you can tell me) that that should stay and I don't have to replace it. But can I tile over the paint that's on it?

doug seibert

08:03AM | 09/10/05
Member Since: 08/10/02
842 lifetime posts
Until recently ......You could install the greenboard within the tub enclosure....

NOT any more........the Listing has been changed....No more tubs and showers....

http://www.usg.com/navigate.do?resource=/USG_Marketing_Content/usg.com/web_files/products/prod_details/drywall_Brand_Water-Resistant_Firecode_C_Core_Gypsum_Panels.htm

The product was never listed/intended to support a TILE surround.......

Tileguybob

10:37AM | 09/10/05
Member Since: 07/03/05
283 lifetime posts
That moisture resistant gypsum core is a joke. I have seen so many wrecked tub walls with greenboard. Water can get in on the side where there is no green paper and the gypsum sucks up the water like a sponge.

If you caulked the base of the board to keep out all water and rough sanded the paint the tile will stick to it but for how long is the question. You have seen the past results of water getting up on that shelf. I would not take the chance.

efinneg2

06:44PM | 09/10/05
Member Since: 09/07/05
3 lifetime posts
Wow -- not what I wanted to hear, but thanks to all for the good advice.

BV008095

02:27PM | 06/16/15
We have just finished tiling above our shower/tub unit and at the top edge of the unit there is a dip in the design leaving about 3/4 inch space that we don't know what to do with. We could grout the whole space but think that might look strange - any sugggestions?

Thanks,
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