I just tiled over some tiles on a hearth and have done no prep other than a
thorough clean. I'd buy a good tile adhesive though, B&Q's own brand does
stick quite well but I think Polycell may be a bit better.
A. It's a nice flat surface
B. I don't like the existing tiles
C. It really is too much work to take the old tiles off, flatten the surface
D. The new tile are perzackerly the same size as the old ones so I have a
ready made cutting guide.
E. A proffessional tiler living a few doors down from me recommends it as a
labour saving device and he does bloody good work.
I think our tiler scored the tiles first to help give a better key. He did a
great job - the tiles didn't comeoff. The only thing that was a pain was
that with the extra tile thickness, we had to chose bath taps that could be
turned without touching the wall - clearance was that tight.
About eight years ago I re-tiled my bathroom over the top of the existing
tiles. The bathroom was already fully tiled from floor to ceiling but in
nasty cheap small tiles. Apart from giving the old tiles a thorough
cleaning with a slightly abrasive kitchen cleaner to remove any traces of
soap or greas (particularly in the shower area) I did nothing else. I
cannot remember what brand of tile adhesive I used but it was nothing
special. The job was entirely successful and the new tiles have remained in
situ without any problem.
I'm now contemplating another bathroom make-over and am just wondering if I
dare tile over the existing tiles again! As you have already pointed out -
removing old tiles is a very messy job and invariably removes huge chunks of
plaster as well.
Further to my earlier post about having our tiles retiled over some old ones
because we thought the plaster would be damaged:
On our bathroom makeover last year I decided we would strip back the tiles
to the plaster, simply to get back some of that room the double layer of
tiles and tile cement was taking. I was expecting a replastering job, but
decided to try and avoid that if I could. I bought a heavy-duty scraper with
a re-inforced handle (you can hit it on the end of the handle with a hammer)
to remove the tiles. The tiles came off beautifully and in two days I had
cleared the bathroom of two layers of tiles, taking care not to dig into the
plasterwork. There were a few small holes to be filled but nothing much -
the tiles came off really well using this tool (basically put scraper at
edge of tile and use hammer to wedge scraper between tile and plaster,
edging the tile away from the wall). I was really impressed by my job and
how good the walls were.
We could have tiled straight onto the cleared walls, except that... ..the
new tiles were larger than the old ones and were poreclain requiring a
particular tile cement and very flat walls, so clean as they were, the
smallimperfections that wouldn't have bothered other tile/cement
combinations forced us to have a skim put on after all. Our tiler showed me
that with one tile placed on a particular wall, the curvature of the
plasterwork caused the tile to rock like a see-saw and with the very precise
fitting requirements, he couldn't correct for this by having a thicker
layer of tile cement.
Lastly, a small heads-up for the OP. I know he was planning to use the
original tiles as a guide. He'll be able to do that for vertical levels, but
horizontally he won't be able to make that work because the increased wall
thickness will mean that at the corners he will lose some room because of
the thickness of the new tiles and cement. You can't just tile one tile over
another and get exactly the same result.
You've convinced me to remove the existing double layer! I wasn't entirely
happy at the prospect of having three layers of tiles and, as the bathroom
is not a particularly large one, it was reducing in size with each layer!
Yes, I understand what you mean. A particular probl;em for us was that our
replacement bath was very slightly bigger, so it was really important to get
as much space as we could, otherwise the tiles would be a big problem around
the bath. I can't guarantee as good an outcome for stripping the tiles as we
had - it's all down to the plasterwork underneath.
In my case I struggled to remove the first few tiles - they were a devil to
get off. once I had access to an edge so that I could slide the scraper
under the edge of a tile, I was off.
Just to convince you it's probably a good idea - the first retiling we did
was as a result of installing a power shower. Within two weeks our tiles
started falling off - revealing tiles underneath! We tiled over these with
waterproof cement and there was no problem. When removing that area that had
originally come off I discovered that the tiles nearest to the wall were no
longer attached to it and that a significant area was two layers of tiles
and tile cement standing without attachment to the wall. It was a surprise..
The scraper I used came from Wickes. They have metal ends to the plastic
handles. I chose the strongest I could find - it's about an inch or so wide
at the end and very strong - the blade is pliable but quite thick.
Thanks for all the replies but I had started to remove some tiles
from a wall which had to have them removed and they nearly
fell off themselves. It seems the original tiler (the contractor who
built these houses) used as little adhesive as they could to lay the
tiles on the wall.
I have now decided to take them all off rather than tile over them
as I have no confidence on the existing tiles will stay on.
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