We are fitting a bathroom and have tiled the shower area. My wife went to b
uy BAL grout today and noticed it said it was suitable for showers but was
water resistant not waterproof. So.... She called their technical support.
They said it should only be used on the wall the shower is on if the wall h
as been tanked/ waterproofed (using some waterproofing paint) first.
Is this correct as I have never heard of this before? Also.... We have now
fitted the tiles with their adhesive which seems to say the same thing (ie
for showers but only water resistant).
Yes I used Hardie Backer on the stud wall the shower itself is on. The othe
r wall is brick and plaster. My fear is more that if the grout/ adhesive is
not waterproof eventually the wall will become damp. TBH not sure what it
means "suitable for showers" if not waterproof.
On Fri, 13 Oct 2017 06:32:14 -0700 (PDT)
It means it won't weaken and fall out when wet. You need to stop the
plaster wall from getting wet by applying something that acts as a
barrier to water, not just something that doesn't mind getting wet.
Having said that, you'll probably get away with it, for a while anyway.
Thanks Rob for your reply. Yes the plaster was sealed with a sealant for new plaster before you tile so assume that covers that angle.
So in summary of I understand correctly, the water may get the grout and the adhesive wet but ingress further would be stopped my either the plaster sealer or the Hardie Backer board. Also neither grout or adhesive will degrade because of the wet.
Is that correct?
I know this is not good but for what its worth, about 20 years back I
retiled my ensuite and never having done it before and not having the
same access to the internet I just ripped off the old tiles, made a mess
of the existing plasterboard, gave a rough skim and put on new tiles and
dont remember getting a `special` grout.. I knew nothing about
waterproofing etc back then.
After 15 years I retiled and the wall behind the tiles was still good,
the shower was used daily, although a rubber sqeejee thing was used to
take excess water off the tiles after showering.
Moved house and redone this shower room using aquaboard, I hope that
lasts as long :-)
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