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Posted by Red Green on October 11, 2009, 9:24 am
506c75449efa@j4g2000yqa.googlegroups.com:
> OK, thanks guys. It's not a very big area and I have a fresh, nearly-
> full gallon of Kilz latex primer. I'll prime it before tiling. Still
> don't see the value of taping the joints that will be tiled over,
> though. They're all butt joints so no valleys to interfere with the
> tiles.
>
> Kilz latex primer
Shake/stir it WELL.
Putting up a separate topic shortly on this.
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Posted by RicodJour on October 11, 2009, 12:12 pm
> >> > Once I find the tile I want to use on that wall, is it necessary to
> >> > prime and paint the new drywall before applying the tile mastic? I
> >> > haven't bothered to tape the joints yet; figure the 4x4 tiles will
> >> > cover the joints anyway. Just wondering if the mastic or thinset
> >> > mortar will adhere good enough to the bare drywall without any
> >> > special prep.
Doesn't anyone read the manufacturers instructions? All manufacturers
of tile mastic specifically mention drywall as a suitable substrate
with no mention of paint or primer.
Tape the joints so there will be no movement between the pieces of
drywall. The movement could pop tile.
R
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Posted by Red Green on October 11, 2009, 2:11 pm
>> >> > Once I find the tile I want to use on that wall, is it necessary
>> >> > to prime and paint the new drywall before applying the tile
>> >> > mastic? I haven't bothered to tape the joints yet; figure the
>> >> > 4x4 tiles will cover the joints anyway. Just wondering if the
>> >> > mastic or thinset mortar will adhere good enough to the bare
>> >> > drywall without any special prep.
>
> Doesn't anyone read the manufacturers instructions? All manufacturers
> of tile mastic specifically mention drywall as a suitable substrate
> with no mention of paint or primer.
>
> Tape the joints so there will be no movement between the pieces of
> drywall. The movement could pop tile.
>
> R
>
Oh, the old RTFM huh?!
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Posted by dadiOH on October 11, 2009, 11:45 am
Josh wrote:
> I've installed new 1/2" conventional gypsum drywall in the area
> between my kitchen countertop and the bottom of the wall cabinets.
> I'm looking for some decorative ceramic tile to use as a backsplash
> over/behind the sink and extend it around to the area over/behind the
> range. What I'd like to know is this:
> Once I find the tile I want to use on that wall, is it necessary to
> prime and paint the new drywall before applying the tile mastic? I
> haven't bothered to tape the joints yet; figure the 4x4 tiles will
> cover the joints anyway. Just wondering if the mastic or thinset
> mortar will adhere good enough to the bare drywall without any special
> prep.
I have a lot of Saltillo time...made 4" mop boards (base boards) of same.
They are all stuck to the drywall with thinset. Some are on paint, some on
bare drywall. None have ever loosened (14 years). If I had my choice, I
would have put all on bare drywall.
Primed & painted, bond is as good as the paint is to the drywall paper.
Unprimed and painted, bond is as good as the drywall paper is to the rest of
the sheet.
--
dadiOH
____________________________
dadiOH's dandies v3.06...
...a help file of info about MP3s, recording from
LP/cassette and tips & tricks on this and that.
Get it at http://mysite.verizon.net/xico
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Posted by Phisherman on October 11, 2009, 6:28 pm
On Sat, 10 Oct 2009 17:17:37 -0700 (PDT), Josh
>I've installed new 1/2" conventional gypsum drywall in the area
>between my kitchen countertop and the bottom of the wall cabinets.
>I'm looking for some decorative ceramic tile to use as a backsplash
>over/behind the sink and extend it around to the area over/behind the
>range. What I'd like to know is this:
>Once I find the tile I want to use on that wall, is it necessary to
>prime and paint the new drywall before applying the tile mastic? I
>haven't bothered to tape the joints yet; figure the 4x4 tiles will
>cover the joints anyway. Just wondering if the mastic or thinset
>mortar will adhere good enough to the bare drywall without any special
>prep.
Before you do anything, carefully read the manufacturer instructions
on the tile mastic container. Be critical about the drywall seams.
Do visual/feel tests using a work light against the wall, lightly run
hands over the seams. Wipe down walls with a very slightly damp terry
towel to remove the dust. If instructions do not say "prime" don't
waste your time doing it--it might even make adhesion worse.
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> full gallon of Kilz latex primer. I'll prime it before tiling. Still
> don't see the value of taping the joints that will be tiled over,
> though. They're all butt joints so no valleys to interfere with the
> tiles.
>