Installing stone resin shower tray

[Dee]

Hi

The shower tray I was about to install has a flat base to it, no indents ect, just totally flat....is this a problem as most I've looked at seem to have a patterned bottom? It appears to not be level either,  it rocks from one corner to the diagonal corner. Should I send it back?

[nod]

I’m just starting ours today 

Bed it down on 10 mil of flexi tile adhesive 

[Dee]

Others have said silicone adhesive is good enough

[Dee]

Also shoukd the ply be cut slightly bigger than the 800 x 800 tray or the exact size?

[saveasteading]

2 hours ago, Dee said:

rocks from one corner to the diagonal corner. 

What matters is that water flows out. So check the running surface of it when installing, as well as the edges, from corners to drain.

[Dee]

Great, thanks!

Im using shower wall panels (so not tiling) therefore does the backerboard sit ontop of the tray? And do I need backer if I'm using panels?

[Dee]

Sorry, racing ahead in all directions.

First hurdle reached....dry laid ply, tray and waste and waste sits slap bang behind a joist ( I've posted a picture) would have to notch out more the 50% of 5" joist to get it through and I know that's way too much. Can't bring tray forward either as not enough space. Don't want to put it on legs either.

Any ideas?!

[Mr Punter]

Can you rotate the tray 180?  Failing that, get one with the waste in a different location.

[TonyT]

Get a flat steel plate made to span a good length of the joist and it will let you make the cut out 

[Temp]

1 minute ago, TonyT said:

Get a flat steel plate made to span a good length of the joist and it will let you make the cut out 

 

+1  Although a hole at mid height on the joist better than notching.

 

Sorry if you know this but...  I leave a clearance hole around the trap in the ply. I plumb the bottom of the trap in position in the floor and support it losely in the right place but with some freedom to move vertically (eg clearance hole nneeded around pipes to allow say 10mm movement vertically). Then fix down ply and tray. Immediately fit top part of trap through hole in tray into bottom part of the trap. This pulls the bottom part up to the under side of the tray hence the need to allow for some vertical movement. Do some dry runs with spacer to represent the mortar/tile adhesive.

 

 

 

[Lofty718]

The kudos connect2 shower trays I bought. have the option of two different waste positions

 

Check them out

 

https://www.kudosshowers.co.uk/connect2-shower-tray/

[Dee]

1 hour ago, Mr Punter said:

Can you rotate the tray 180?  Failing that, get one with the waste in a different location.

I could but that eould make it very tricky to reach if needed. I did consider that but not really an option I'm afraid 

[Dee]

9 minutes ago, Lofty718 said:

The kudos connect2 shower trays I bought. have the option of two different waste positions

 

Check them out

 

https://www.kudosshowers.co.uk/connect2-shower-tray/

I looked at those but the joists would still interfere! Bloody typical!

[nod]

5 hours ago, Dee said:

Others have said silicone adhesive is good enough

If you put it on silicon it will rock Especially on a timber floor I’ve tiled and paneled around lots of trays that have relied on what’s on the walls to hold it in place 

Spend a tenner on some tile adhesive and do it once 

[TonyT]

Clean the. Bottom of the shower tray

Get tile adhesive, rub the bottom of the shower tray with it to make sure it’s all covered almost like painting it in, put it on the floor with a notched trowel 

[TonyT]

Oh and use 50mm pipe 

[Dee]

12 hours ago, TonyT said:

Oh and use 50mm pipe 

Could I run the waste pipe parallel to the joist with fall and 'T' it into the sink waste to get under the joist?...see sketch

There is a void of about 7"                ( bathroom joists/void/ceiling beams) which would allow for plenty of wiggle room and fall.

 

 

[Big Jimbo]

Is the pipe from the sink going under joists or through them ?

[Dee]

42 minutes ago, Big Jimbo said:

Is the pipe from the sink going under joists or through them ?

Under. There is a void of 7"

[Big Jimbo]

Then that will be fine, and much better than cutting into joists.