Going to redo the entire bathroom.
Have been told that tile under the bathtub is the way to go. The
bathtub is a standard, 3 wall installation. Probably will be Americast
What are the advantages/disadvantages of including tiling under the
tub, if any?
Was told that by having the tub sitting on top of tile will help with
the grouting/calking not breaking away after elapsed time.
First let me caveat below with the fact that I'm not a professional.
I've never seen an install where a built-in tub was sitting on tile. That
doesn't mean they're not out there.
As far as the advantage regarding the caulk and grout.. if the tub is
causing settling of the underlayment, which would be a possible cause of
your caulk and grout problems, I don't really see that tile would solve
this. The tile will settle right along with the underlayment and if the
settling isn't perfectly distributed, and it won't be, then the tile laid on
top is almost certainly going to break up at grout joints.
Not even addressing the possibility that the underlayment and framing below
the tub has moisture damage causing it to lose structural integrity. If
that's the case you really need to fix that before you do anything else.
Another obvious issue is extra cost. Why pay to lay decorative tile where
no one will ever see it? If it is in fact the case that adding a layer of
ceramic under the tub provides added support and resistance to settling, and
any pro would know this, then it seems to me that you can at least use a
cheaper tile under the tub and have the tile types meet underneath the tub
where they will be invisible. It also seems that a larger tile size would
provide better support than smaller ones that you are most likely tiling the
floor with. Fewer joints.
One other thing to consider I guess is that fact that if your tub is
currently causing the underlayment to settle, then the weight of a tub plus
the tile will make it settle even more. Perhaps actually, that's the key to
all this. The weight of the tile causes the underlayment to settle as far
as it's going to and so the additional weight of the water and person in the
tub has a much smaller effect on settling than it would if that tile weight
were absent. Again, a pro would immediately know this.
hope this helps... read the first line
On Fri, 6 May 2005 09:10:27 -0700, "Charles Spitzer"
I don't think I have ever seen tile under the tub either. I can't see
where having it under there would help with the grout. It could
possibly help with the caulk but you have to redo caulk every five or
ten years anyway so...
It's like running kitchen flooring under the base cabinets -- not
necessary, but hey, it's your house.
Not doing it -- Save about 15 s.f. of tile and install. Possibly
save 15 s.f. of underlayment. I think the look of tile butting to
the tub is better than tub sitting on tile.
Doing it -- whoever told you it was a great idea will be glad you
followed the advice.
Also consider that the height of your bathtub will be higher now. If
you are putting in a mud floor,that could be at least 2". Could be a
factor getting in and out of the bathtub, especially for older people
or kids, and especially if you plan on installing sliding shower doors
since the track will add another inch to climb over.. Like other
posters said, I've never seen it done.
Perhaps I am confusing the issue for a tub installation vs a toilet
Regarding a toilet installation: If tile is not installed first, and
a toilet is installed, would that cause a problem (measurement of
cutting rough waste line pipe) at a later time when tiling is
I have rough plumbing for toilet in my basement. My plan is to
install a toilet, temporarily there, for use while the upstairs
existing bathroom is gutted and remodeled; no tiling planned at this
Does the issue about tiling under toilet cause a different cut
point on the waste line, that would later present a problem when
adding tiling to the basement floor ?
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