tanking, sealer questions for you experienced tilers please

[jape]

Short story: manky tiling above bath, some loose and cracked straight on plaster wall (pink plaster and some grey board). No sign of membrame or sealer of any type anywhere except rotten silicone bead between bath and tiles. Evidence of some moisture, not a lot, getting by that. This is electric shower over bath with telescopic rod, curtain.

Whole bathroom will be replaced and tanked with membrane as wet room in nine months to a year, meanwhile want retile as shower used often. So without annoying professionals here, can I just patch plaster and plasterboard with polyfilla where holed then paint something like mapei on - then tile using a bucket of tile cement for example (and try and get a doubled sided Bellseal or comparable tape seal down between bath and wall first rather than silicon bead it after).

The bathroom is essential but is just a bath down the length with a loo under far window, nowhere wide enough for a full shower, 550 return by window, 600 by built in boiler cupboard plus a narrow walkway down length of bath so it will be refloored and properly sealed when savings have grown enough to redo it as full wetroom with shower screen. But I don't just want to retile around bath without waterproofing, even if is temporary 9 months is a good while.

Thanks.

[jape]

Sorry, wrong bit of forum, can't see a delete button

[moderator2]

I'll move it to Tiling.

[kingnewport]

Get some pictures up of the area affected

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[Inky Pete]

If it's all getting re-done in a year or so anyway, have you thought of using shower panels?

http://www.wickes.co.uk/shower-panels

Much quicker to install and seal than tiling.