Thanks all for the comments, most appreciated
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Apologies in advance for the long post!
What waterproof membrane?
On the advice of topps tiles, I'm going to apply this:
http://www.homelux.co.uk/index.php?l=product_detail&p=113
to the wall on the left and the back wall.
Out of interest, having gone to the effort of making that parallel offset at the bottom of the copper pipes, who's idea was it to use speedfit joints?
It was the plumber who did this.
Maybe the pipework under the floor is plastic
Exactly. Is this a concern?
You can’t just tile over that. What’s the rest of the wall made up of, is it a conventional base coat & finish plaster or plasterboard? Are you saying your plasterer stuck a lump of plasterboard onto the bottom of a wall where the skirting came off & then just skimmed over it? If so that’s a bodge, particularly if he knew you proposed shower install. If he’d done it properly with Bonding & then finish skimmed, you could then just tile over it.
Exactly, existing wall is base cost and plaster... he just stuck plasterboard underneath and skimmed over.
If it’s a conventional plaster finish, can I ask why you’re proposing to use a membrane?
Not sure, that's what topps recommended. Is in not necessary to have a membrane over conventional plaster finish?
I can see pipes on the left, what are you proposing to do there?
These will be boxed in with hardibacker, membrane applied, and tiled.
when the op says the whole section of plasterboard came away from the wall
does he mean it was dot n dabed or what ?
Yep, dot and dabed. You can see in the picture where it has come away completely where the gap in question is at its greatest height. Where it is lower, only half the newly installed plasterboard has come away.
can't understand that gap either between the wall and tray by the waste.
do you mean the wall on the left? There will be a gap there... approx. 300mm between wall and shower tray. The wall on the left is the side of the chimney stack. It protrudes approx 450mm from the back wall. The other half wanted an offset quadrant shower, so that’s what we got
![Smile :) :)](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
rather than building a false wall and putting a rectangular shower in which I probably would have done.
Going to be fun decorating it/keeping it clean
In not sure I understand. Is it because it is a small section of floor / wall?
Things generally don’t look right around the tray, perhaps the OP is going to fit studding but then why have the wall plastered; without further clarification, were all just guessing at it
The wall on the left will be boxed in, shower tray will set in left hand corner against wall on left and back wall. Back wall left as is, put membrane and tile.
Wall on right, pipes boxed in with hardibacker, membrane, then tiled.
Thanks again all, really enjoying learning about this stuff. This is the first time I've done a bathroom (with help of plumber, electrician and plasterer) but will definitely know what to look out for next time!