Over the years I have had to replace a number of resin shower trays
which have cracked. I suspect that the cracks develop because the
bases are not properly supported underneath as there is always a hole
in the flooring to cater for the bottle trap and pipework. Can anyone
advise me of the proper procedure for their installation? Should the
tray be bedded down in something to provide better support?

Thanks in advance

David

On 29 Aug 2004 18:01:56 -0700, (David
McMillan) wrote:

Over the years I have had to replace a number of resin shower trays
which have cracked. I suspect that the cracks develop because the
bases are not properly supported underneath as there is always a hole
in the flooring to cater for the bottle trap and pipework. Can anyone
advise me of the proper procedure for their installation? Should the
tray be bedded down in something to provide better support?

Thanks in advance

David


Yes, they should be bedded on either a fairly dry mortar mix or on
silicone sealer. This should cover the entire area.

First of all, the floor should be firm under the whole area of the
tray. Use a piece of 18mm WBP ply if you are in any doubt.

Then position the tray on thin wooden shims to simulate the depth of
the mortar and adjust the trap to mate correctly with the underside of
the tray.

Remove the tray and the wood and put down the layer of mortar to a
depth of about 10mm. Put a smear of silicone sealer on the top face of
the trap both below and above the rubber washer Level the mortar
roughly then position the tray.

Check that the tray is level in both directions and adjust if
necessary.

Fasten the trap with more silicone sealer under the flange.

Recheck the tray and make sure that no mortar has escaped from under
it. Push back in place if it has.

Leave for 24hrs before use.
..andy

To email, substitute .nospam with .gl

Thanks Andy

Andy Hall wrote in message . ..
On 29 Aug 2004 18:01:56 -0700, (David
McMillan) wrote:

Over the years I have had to replace a number of resin shower trays
which have cracked. I suspect that the cracks develop because the
bases are not properly supported underneath as there is always a hole
in the flooring to cater for the bottle trap and pipework. Can anyone
advise me of the proper procedure for their installation? Should the
tray be bedded down in something to provide better support?

Thanks in advance

David


Yes, they should be bedded on either a fairly dry mortar mix or on
silicone sealer. This should cover the entire area.

First of all, the floor should be firm under the whole area of the
tray. Use a piece of 18mm WBP ply if you are in any doubt.

Then position the tray on thin wooden shims to simulate the depth of
the mortar and adjust the trap to mate correctly with the underside of
the tray.

Remove the tray and the wood and put down the layer of mortar to a
depth of about 10mm. Put a smear of silicone sealer on the top face of
the trap both below and above the rubber washer Level the mortar
roughly then position the tray.

Check that the tray is level in both directions and adjust if
necessary.

Fasten the trap with more silicone sealer under the flange.

Recheck the tray and make sure that no mortar has escaped from under
it. Push back in place if it has.

Leave for 24hrs before use.
.andy

To email, substitute .nospam with .gl

On 30 Aug 2004 12:01:35 -0700, (David
McMillan) wrote:

Thanks Andy



Just one point on choice of material. I used mortar quite
successfully. I believe that at least one person here has used
silicone sealer. If you do use it, you will need a lot of tubes and
very good ventilation or you will gas yourself with acetic acid
vapour. I believe that the final result was successful though.




..andy

To email, substitute .nospam with .gl

Andy Hall wrote:
On 30 Aug 2004 12:01:35 -0700, (David
McMillan) wrote:

Thanks Andy



Just one point on choice of material. I used mortar quite
successfully. I believe that at least one person here has used
silicone sealer. If you do use it, you will need a lot of tubes and
very good ventilation or you will gas yourself with acetic acid
vapour. I believe that the final result was successful though.


I think if you used enough silicone sanitary sealant to do this job, the
whole room would be smelling vinegary for weeks! And it would be an
extremely unpleasant place to be while the stuff was curing!