I am in the process of fixing the shower cubicle, had a leak and totally
destroyed the plasterboard behind, tiles were falling off, etc. Anyhow, I
totally ripped out the shower and will be in the process of re-installing
this week. I have a couple of questions.
I am thinking about doing the job properly and using marine ply instead of
plain old plasterboard or water resistant plasterboard. Is this what you
would do or should I be doing something else? What about alternate products
instead of tiling?
The other thing is that when I stripped everthing out I noticed that on the
other side of the wall there is a plug socket. the back of the metal back
box is visible. Where the shower was leaking was very near it. Is there any
regulations on this? should there be some plastic covering it? should I or
can I cover it with plastic to make it more safe. Can I build a cover around
it? After I fix the shower the likelyhood of water ever reaching the socket
is going to be very minimal but while I have access to it I might as well
make it right. What can you suggest?
Nothing will survive a leak in the wrong place - like behind the cladding.
Tiling on plasterboard is perfectly ok provided it gets the chance to dry
out properly after use through decent ventilation. You need a good seal
between walls and base, though.
*'Progress' and 'Change' are not synonyms.
Dave Plowman firstname.lastname@example.org London SW
Use WBP ply. Proper marine ply is many times as expensive and offers no
additional benefit in this application. Some use Aquaboard, which is good,
but very expensive.
Be careful when tiling. You should use a top quality tile adhesive. Avoid
value adhesives and those claiming suitability as a grout too. I'm sure I
could buy a car that can mow lawns, but I suspect buying a separate car and
lawnmowers would result in better results for both tasks.
I usually use a tile adhesive that claims suitability for commercial
swimming pools. Ardex Flex is my favourite. Hard to find, but worth it.
Ensure you fully fill behind the tiles. No dot-n-dab here. Occasionally take
a tile off immediately after affixing and ensure that it fully bedded in
with no air gaps. If there are any, start again. Use a quality grout, also
claiming commercial swimming pool suitability. Finally, seal the grout (and
the tiles if porous) with a decent sealant, like Lithofin StainStop KF. With
that lot, the tiles will stay affixed for 100 years. The grout will stay
For your application, I would recommend:
Ardex-Flex 6001 Adhesive
Ardex-Flex FS Grout
Lithofin KF StainStop Sealant
If you're worried, cover the back with some left over ply and seal it to the
wall with some silicone.
Actually, they seem to recommend a different product if you use ply, called
Ardicol D20. However, this is a readymix and not quite so heavy duty. To be
honest, I'd probably still use 6001, or 7001 TS, although I take no
responsibility for the consequences!
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