The best way is to plaster the wall to fit the worktop. It doesn't matter if
you are no good at plastering - you'll be tiling over it. Get some plaster,
how much depends on the size of the gaps, and having distressed the wall to
provide a key, put it on level with the back of the worktop, tapering the
plaster up the wall. One coat should do it, and when it's gone off a bit
(say 1 hour) level it at much as possible.
If you MUST do this then het some pattens and batten out teh wall to
level with vertical strips packed oiut with scrap to make a guide for
IME trying to get plastering level is hard for professionlas, let alone
Yes, I agree basically. However, here the OP has got an existing wall that
just needs modification and then he's going to tile over it anyway. I would
have thought the guide consisting of the back of the worktop would have been
slap a piece of plasterboard up, much easier ... stick a dollop of bonding
every 8 inches or so and squeaze it in place and let it set, then tile over
and if it's on a run of wall where the tiling is to finish, you'll just have
to put up with a larger step from wall to the tiling, a nice bevelled grout
edge should finish it off.
Seconded. Just chop away at the plaster high spots, a non-critical if
somewhat rough and ready approach. Way easier and quicker than cutting the
This may have the effect of recessing the worktop into the plaster which
will aid sealing the tiles.
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