Shower tray former: tiles and waste height

[DazJWood]

Hi,

I have installed a shower former; the type that is a foam core sandwiched by a meshed cement layer either side:

The mosiacs that I wanted to install will be lower than the drain surround (even with the adhesive).

I have included some pictures below of the mosiac layed next to the drain:

The board to board joins and board to former will be tanked shortly.

I was intending to fix them with a 6mm notched trowel but now I have offered them up to the drain it's clear that they won't be level with the top of the drain surround.

Can I still use these mosiacs? Should I use a thicker bed of adhesive?
Would I be better to use full tiles and cut them to the fall of the tray (envelope cut)?

I would be grateful for any advice anyone can offer.

Many thanks in advance,

Daz

 

[Tony_C]

Hi Dan, have you checked the minimum tile size for that brand of tray? Most can only take down to 50x50mm for point loading issues. There are brands than go go lower but its something I'd be checking also which may help sway you towards larger tiles

 

[DazJWood]

Thanks for the response Tony.

The documentation that came with the tray does not describe any restrictions on tile size or point load information. In fact it says nothing about tiling onto it at all. I've checked the manufacturer's website (nassboards.co.uk) and there is no information that I can find on there either. The tray I've got is also not on there.

I can ring them up on Monday and ask for their advice.

Any further advice, in the mean time, based on any experience of a similar issue, would be gratefully received.

Thanks,

Daz

 

[Dumbo]

Thanks for the response Tony.

The documentation that came with the tray does not describe any restrictions on tile size or point load information. In fact it says nothing about tiling onto it at all. I've checked the manufacturer's website (nassboards.co.uk) and there is no information that I can find on there either. The tray I've got is also not on there.

I can ring them up on Monday and ask for their advice.

Any further advice, in the mean time, based on any experience of a similar issue, would be gratefully received.

Thanks,

Daz

When you phone them up and ask for their advice regarding tile size get them to email their limitations so if it goes wrong you have something in writing.
Don't use a bigger notch trowel the adhesive will just come through the joints .
You could may be consider overboarding the tray with a 4 or 6 backer board if they are ok with point loading issues

 

[DazJWood]

When you phone them up and ask for their advice regarding tile size get them to email their limitations so if it goes wrong you have something in writing.
Don't use a bigger notch trowel the adhesive will just come through the joints .
You could may be consider overboarding the tray with a 4 or 6 backer board if they are ok with point loading issues

Thanks, will ask them.

Over boarding with backer board? How would I maintain the fall to the drain if I did that? Envelope cut them?

 

[Dumbo]

Thanks, will ask them.

Over boarding with backer board? How would I maintain the fall to the drain if I did that? Envelope cut them?

Yes and tape the joints

 

[DazJWood]

Yes and tape the joints

Surely I couldn't just envelope cut a whole backer board. Wouldn't I need to cut the board up to a smaller size as well? A whole board just envelope cut wouldn't follow the fall of the former surely.

 

[Dumbo]

Surely I couldn't just envelope cut a whole backer board. Wouldn't I need to cut the board up to a smaller size as well? A whole board just envelope cut wouldn't follow the fall of the former surely.

Of you were fixing xxl tiles you would just envelope cut one tile , so why not

 

[DazJWood]

Of you were fixing xxl tiles you would just envelope cut one tile , so why not

Would the mosiacs then fix over the enveloped cut backer boards ok (where the diagonals are) ?

 

[J K Tiling Cornwall]

Just an idea but could not not stick mosaic mesh sheets to the former and trowel over with adhesive? Will make the base pretty solid and will follow the fall/fleet.. Then fit the mosaics as normal fixed to mosaic mesh. Not sure if 2 layers would be enough? Should get over any point loading issues and will achieve a 100% bed.