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I have read most of the posts on this subject, I used to be uncertain now I'm not so sure!
I have removed the old tiles from a shower enclosure (square) with a view to putting in a quadrant. The enclosure is dot and dab with a further thickness of plasterboard? on top. Tiles came off fairly cleanly (been on 15+ years) but so did the top layer of facing paper on the plasterboard.
Is it possible to tile onto this surface? Does it need to be tanked and if so with what? If not what other suggestions are there?
Grateful for you further advice, downstairs loo and bathroom successfully completed with you help, onlly the small shower room (2M square) left. Gene

what makes you think there are two layers of plasterboard?

What surface are you paced with presently? Is it the plaster, chalky stuff in the centre of the board?

Remove the plasterboard from the shower enclosure and replace with aquapanel then tile directly to the aquapanel no need for tanking

Where I have removed the stud wall from the old square enclosure I can clearly see two sheets of board.. The facing is paper with just one small (10mm) pice of white plaster showing. Thanks. Gene

Thanks for your help. I read a lot of the other threads on this subjsect and there appears to be more than one way of skinning a cat! The house was built in 1983 and the walls are dot and dab plasterboard. The partition walls are of the honeycombed plasterboard variety so it makes one wall a little tricky.
Anyway I have decided to go the aquapanel route and have already stripped back to brick on the exterior wall. Incidentally this wall was simply plasterboard fixed by dot and dab with another layer of pb simply stuck on with some form of glue. There was only the smallest sign of water penetration in a corner - not bad for 26 years of use twice if not more every day. Thanks again for your help. I wouild like to put sdome form of insulation behind the aquapanel to reduce noise etc - any ideas. Gene

Read the technical stuff on Aquapanel.

It isn't able to dot and dab as it is cement based and needs a vois behind it according to the manufacturer.

Moisture resistant plasterboard may be the answer but this cannot be plastered so you may need to do the first layer of plasterboard as normal and only the second as Moisture resistant.

Where you have stud walls, aquapanel if you can afford it .

Many thanks. Seen the manufacturers bumph. Put aquapanel in, haven't managaed a big a void as they recommend but at least there is one (about 35 mil) Thanks again for all your help. G

plumbdumb wrote:Many thanks. Seen the manufacturers bumph. Put aquapanel in, haven't managaed a big a void as they recommend but at least there is one (about 35 mil) Thanks again for all your help. G

plumbdumd missed your first post mate, little late now but you could have looked into marmox boards.

Cor, you certainly live and learn on this site. Never heard of marmox boards and too late is the cry. Hoever I have been greatly impressed by the number of people who respond to "dumbbells" like me with patience and understanding . I only hope that I can make some useful contribution on a subject I have experience of. Thanks again. G. (PS I am quite good at dodging the wasking up!!!)