Hi - my plumber has just installed a shower tray, and it would be very
difficult to remove. However, the tray is not very well supported.,
and flexes when stood on. It was supported with mortar, but only in a
few areas (for some reason), and these blobs of mortar have not stuck
in place so they can be pushed around with a stick...
However, I can get access with a hose to the cavity under the
fibreglass tray. Can anyone suggest some sort of filler I can pump
into the void, which will set hard enough to support the tray well?
I'm concerned standard expanding foram may not be up to the job...
The correct solution would be to ask the plumber to come back and fit
the tray properly. If it's difficult to remove, that's his problem.
If he breaks it getting it out, that's also his problem.
It should be bedded according to the manufacturer's instructions and
that usually involves support for the whole base. If you do something
now that turns out to be unsatisfactory and the tray cracks in a few
weeks or months you will have no real come-back.
Unfortunately the manufactures instructions were in no language known
to mankind - multiple translations had been involved I think. If it is
damaged, it becomes my problem, as it was very hard to source, and
will be extremely hard to replace.
I had assumed they would do the following however:
Put tray upside down
Fill with mortar
Place pedestal on top
Wait to dry
Up end whole lot
Hence the whole cavity is filled. It seems this was not done...It is
difficult, 'cos my plumber is very nice and claims it will be fine,
but I'm don't really share his confidence...
There was a case, IIRC involving an ICI pesticice, that held that
instructions were part of the product and faulty instructions meant that
the product itself could be regarded as faulty.
If you bought the tray as a consumer I think you could expect it to come
with sufficient instructions that it could be fitted by a competent
DIYer or professional. Therefore you may have recourse against the
retailer if you can show your plumber followed the inadequate
instructions and it all went wrong.
Well, as of yet nothing is broken...I hope to manage not to break
anything by suppotying the trsy, one way or the other, before it gets
much use. To the best of my knowledge the plumber is a good bloke with
an excellent reputation, so fingers crossed...
On Sat, 27 Oct 2007 06:24:51 -0700, barkerben wrote:
=================================I don't think this would be a good way to get a full mortar base as the
mortar would be so heavy that it would probably fall out when you turned
the tray the right way up.
On the other hand this would be a good way of filling the entire cavity
(allowing space for necessary access holes) with expanding foam since you
could over-fill and slice off the surplus when fully cured. It would be
best to leave the foam slightly 'proud' if you choose this method.
Using Ubuntu Linux
Standard expanding foam will be more than strong enough if the void
is completely filled. However, the problem will be getting the right
amount in. It continues to expand for about 20 mins and if too much
is put in place with no expansion outlet it will be more than strong
enough to push a ceramic shower tray up out of its mountings. You
would have to do it in installments putting a layer of foam filling
the space vertically but not horizontally, leaving it to set (and
expand horizontally, and repeating the process. Simply squirting a
pile of foam through a hole will almost certainly lead to either not
enough foam going in or too much with the consequent risk of damage.
There is a cavity approx. 10cm high, with a hole for the waste through
which a hose can be put. I was thinking that I could put an extension
hose on my foam cylinder, then fill from the back of the shower tray,
working forwards towards my hole. Hopefully the stuff is runny enough
that it will fill sideways if it finds above is blocked, with the
eventual release point being the hole I have poked my hose through...?
It will roughly double in size, mostly after it's too stiff to
be forced out of the hole. You'd probably end up with a domed
bottomed shower tray. (Do have a digital camera handy so you
can put the pictures up on a website;-)
I think you can do this with expanding foam, but you are going
to need better access and visibility underneath to control the
Have a read of http://www.diyfaq.org.uk/humour.html#foam
[email address is not usable -- followup in the newsgroup]
On 27 Oct, 15:16, firstname.lastname@example.org (Andrew Gabriel) wrote:
I suppose the only way of ensuring full support then would be to use
something extremely fluid and non-expanding. Seal around the hose
entry point and simply fill up the void, then wait for it to go off.
Any ideas of such a material? We use something like that for sealing
the bottom of on-street equipment, but unsure what it is made of!
On 27 Oct 2007 14:16:04 GMT, Andrew Gabriel wrote:
That's what it says on the tin, I don't believe it. Quadruple from the
inital size a few seconds after leaving the tube is more like it, at least
with the DIY stuff.
There is in effect a double expansion, an inital one lasting say 30s to a
minute, from when the stuff leaves the tube. This inital expansion is
roughly double from the size a few seconds after leaving tube. Then a much
slower and longer one (20 mins or so) which doubles the volume again.
Also be aware that the stuff sticks to anything and everything, instantly.
Vegetable oil is a good release/cleaning agent. I'll certainly cover my
hands with veg oil next time I ever use the stuff.
Or get one of the foams that just does the initial 30s - 1min x2
expansion. The window fitters last years had something that did just that,
far easier to judge how much to squirt in. Another thought is to use some
form of mould to force the foam up to the base of the tray but have a gap
for over expansion and do it in stages working forward, if you have the
access of course. For a mould I'm thinking of some thin card rolled into a
4 to 6" dia cylinder.
Dave. pam is missing e-mail
I had been thinking of getting a canister and putting a section of
hose on the front, approx 1m long, so that I could deposit the foam in
the correct places. The question is whether the pressure would be
enough for this extension tube to work...
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