Which one first?

[R-Jeffery]

Hi,

Very quick question, in the process of fitting a new shower enclosure.

Do I need to board to the floor and then fit the tray or fit the shower tray first and board onto the tray?

Tray is 800 x 800m and has a lip to it. As detailed in picture below. My worry is if I fit the tray first, will I have issues fitting the shower enclosure?

 

[White Room]

What do the instruction say for the shower tray.....

 

[Dougs Third Go]

I've always thought that these trays were fitted after boarding and then the tiles should come over the lip.

 

[bugs183]

Can depend on how thick the lip is. Sometimes to tile over the lip can kick the bottom of the tile out. I also don't like the idea of the transition from the boarded wall to the tray, in my view it would stress the tile and adhesive at that point.
Ideally you'd fit the shower base, board over and tile that way any water is enclosed, but if the shower screen won't allow it then that can't be done.
To be fair, i've seen these done all kindsa ways and none seem ideal.
Showers could do with a nice thin flexible upstand, but not a thick as this.

 

[AliGage]

What is the internal measurement from inner upstand/lip to edge. Also, what is the adjustment of the enclosure? Does this tray have the upstand all the way round or just a number of sides?

 

[R-Jeffery]

Morning All,

Thanks for the quick responses.

Whitebeam - The shower tray is the original that was already in our apartment when we bought it a couple of years ago so I dont have instuctions with it i'm afraid. The previous installation was tray first, then boarded down the to the lip but we have had to replace all of the tiles, boarding etc due to water damage over time.

Aligage - The upstand is round the whole of the tray - Internal measurement from upstand to lip is 50mm. The enclosure is arriving tomorrow so I dont have the full instructions for it yet but on the website it says the following - (40mm out of wall adjustment for ease of fitting to ensure water tight seal)

If I install the tray first and then tank would taping from the board down to the tray be a suitable waterproof solution. It doesnt sound ideal.

 

[AliGage]

Ok, sorry. Measure along the edge of the tray from inside upstand to the opposing inside upstand. Basically accross the tray where the enclosure will sit.

 

[R-Jeffery]

Ooops, apologies AliGage.

Measurement on the inside of the tray is 790mm x 790mm.

FYI - moistureboard is 15mm

 

[Ollie02948]

I personally think these trays can be a bit awkward. If your going to fit tray then board over then tile be careful of width of shower door, it may not fit. If board then install tray the lip on the shower tray will kick the tiles out at bottom. I would go with fitting a tray with no upstanding and make sure it's sealed, tanked correctly.

 

[AliGage]

Ooops, apologies AliGage.

Measurement on the inside of the tray is 790mm x 790mm.

FYI - moistureboard is 15mm

You've got no issue with your enclosure from what you've said. If the internal measurement is 790mm. I think you said you have 40mm adjustment for untrue walls? Presuming 800 enclosure it will be 20mm either side. 790 falls perfectly within this. What i would do is chop the tray into the wall so the inside of the lip is flush or just under the face of the board. I use a works multitool to do the cut out, trying to leave a good surface on the remains of the board. Apply your waterproof coating, once dry 2 parallell beads of silicone (I prefer to use CT1 as well as a sealant it has far better bonding strength than sanitary silicone) and push the tray into place. With the inner lip flush to the wall it leaves 790 to the adjacent corner, ample room for your bi-fold door.

That's how i'd do it anyway. Continue the rest of prep and tile.

 

[Dougs Third Go]

I thought these trays were designed to stop water ingress from the shower tray, hence the upstand. The upstand on the ones I've seen are usually 2-3mm thick and with a 6mm trowel you should be able to stop tiles kicking out at bottom, just my tuppence worth.

 

[AliGage]

I've seen them fitted all sorts of ways and differing instructions from different manufacturers. No idea how it was intended by design to be installed. I just prefer cutting them in. Just peace of mind that the lip won't cause any tiling issues. I think orginally it may have been designed to fit flush to the wall and lead your 6" biscuits straight off the lip. I've seen them installed this way quite a few times as well, and instruction showing this way.
Ultimately as long as the base is level, well supported, and sealled correctly all should be good.