Shower tray - Space between the plastered walls

[Lincolnshire Ian]

Hi everyone 

The plasterboard is starting to go up and I have been thinking about the gap we need to leave to accommodate the shower tray. 

I am thinking that from plastered wall to plastered wall we need the width of the shower tray + 10mm at either end to allow for manoeuvring the tray into place. This gap will then be filled by the width of our tiles which will sit on the tray. 

Does this logic work or am I missing something?

Thanks 

[Oz07]

Sounds fine some will do it tight the trays can accommodate the thickness of the tiles overhanging on them usually 

[crispy_wafer]

Whatever you or your fitter feel comfortable squeezing sealant into tbh.  I managed just get to about 10, so that gave me a brown packer at either end of the tray, still caught the wall as I let the tray down onto adhesive.  I had the tray sat on its long edge in the opening before adhesive.  Tile adhesive went down, then let the tray down onto the adhesive, this allowed the tray to come away from the long edge wall a bit, then a bit of ebt along the wall and rocking the tray back and forth got the tray into final position.  This was onto screed btw.  I used the above approach as It was a heavy stone resin thing, which I didn’t fancy trying to handball into the room then onto the adhesive, would have killed my back!

[Nickfromwales]

5 hours ago, Lincolnshire Ian said:

Hi everyone 

The plasterboard is starting to go up and I have been thinking about the gap we need to leave to accommodate the shower tray. 

I am thinking that from plastered wall to plastered wall we need the width of the shower tray + 10mm at either end to allow for manoeuvring the tray into place. This gap will then be filled by the width of our tiles which will sit on the tray. 

Does this logic work or am I missing something?

Thanks 

2 sides contacting, or 3?

[Lincolnshire Ian]

3 hours ago, Nickfromwales said:

2 sides contacting, or 3?

three

[Nickfromwales]

1 hour ago, Lincolnshire Ian said:

three

Ok. 
 

You’ll want to be able to push the tray side to side, lengthways, by 5mm (so 10mm of wiggle room), and to be able to have it 5mm away from the opposing wall.

 

This will allow you to get the tray in, and to then be able to load all the gaps with clear CT1. 
 

You then mask the top of the tray on the 3 sides, frog tape or pvc electrical tape, and once loaded you push the tray towards the shower head end, and then back against the long wall, displacing the excess. 
 

Use (lots and lots) of cheap wet wipes to clean up the excess and then fill up the gap on the far end. Tool this into shape with a plastic packer and then peel off the masking tape.

 

BINGO.

 

Search wetroom and tanking on here and shower room for more info. 
 

And this may be a good read. Tanking the shower makes it bombproof. Been doing high end bathrooms for over 30 years and zero failures.

 

[Oz07]

What do you bed your trays on @Nickfromwales

[Nickfromwales]

3 hours ago, Oz07 said:

What do you bed your trays on @Nickfromwales

Flexible tile adhesive.

 

Always important to decontaminate the underside of the tray as they come covered in dust and mould release agents and so forth. I get a cotton dishcloth (old school ones are best) and use a bit of the tile adhesive made up a bit wetter and scour the underside of the tray until you see the adhesive wanting to stay on it. Then butter it a bit and you know it's going to stay put.

[Lincolnshire Ian]

Thanks everyone