Help needed please with leaky bath nightmare!!

Wookey

Sorry for lateness in replying, plasterboard beneath the bath isn't needed unless you plan on having an open bath, a bath panel will hide anything that is unboarded. Totally supporting round a bath is a bit of a grey area, you need to be careful that there is no duress at all placed on the bath as it can cause plastic baths to split, if you have cast iron or pressed steel you will be fine with any supports though cast iron shouldn't need any:) Also if you rely on wooden supports which are attached to a wooden floor the movement in the floor can than cause movement in the framework etc.

Matt002

Tucker wrote: »

(some experts advise against pva, despite this being common practice).

PVA is bad to use as it is water soluble, so if you PVA a surface then tile on to it when some moisture gets through the PVA returns to its runny state and the tiles can drop off. I think you need quite a bit of moisture for this to happen, not sure if a domestic bath / shower would generate enough wetness

Like Tucker my bath is built on a 2 x 3 frame and the bath feet are on 2 x 4 bearers laid on the floor to make sure it doesnt fall through the chip board floor. Its a slightly bigger bath at 1800 x 800 but there is no movement at all and no leaks with two people and full of water!

I used a stack of mapei based products when tiling my bathroom:
Primer G to primer the plaster walls
Mapegum for tanking the wet room bit
Keraflex maxi cement based adhesive
Ultracolor plus water repelent grout
Mapesil sealant

Wasn't cheap but I have no complaints.

Might be worth looking at removing any damaged plaster board and replacing it with aquapanel in the shower area this wont break down when it gets damp like plaster board does.

Igol

I'd go for water resistant PB, which for some odd reason was actually cheaper than the regualr stuff when I did mine?