Which trowel and natural stone border advice

[Davesax]

Hi

I have a couple of questions on a job i'm on , the tiles are ready to go tomorrow . they are 333 x 250 x 7, the substrates are fairly even.

1,Will my 6mm trowel suffice ?

2. I have a marble border 50 mm to seal - can I seal it after it's up , if i do it before , I presumably have to wait over night for it to dry before fixing. I really want to crack on with the job .
If this was the case , would i just measure and leave enough space between tiles to fit in the next day ?

I'm on a sharp learning curve , thanks very much for any advice.

Dave

[Dave]

Hi dave..

I would say 8mm minimum..

And yes you can seal after wards if careful..

[Davesax]

That was quick, thanks. I have a 10mm or should I get an 8 tommo?

[Ken Bruty]

Hi Dave,

Firstly I would use an 8mm sq notched trowel, particularly on a wet wall area, secondly, if you are putting up a border, sometimes it's easier to do the bottom half up to the border height, then work up, from the border to the top. Hope that helps.

[Dave]

Probs best to get an 8 as well Dave.. .. never have too many trowels..

Are you going cement based adhesive..?

[Davesax]

8mm it is , i'm using ardex D30 .

[Dave]

8mm it is , i'm using ardex D30 .

Bed them in as tight as you can and leave at least 48 hrs to dry if the substrate is porous, if not then you might have to leave a lot longer.

what you tiling to..?

[Davesax]

Leave 48 hours before grout?? 2 of the walls are tile over tile , one is mostly tanked and the other is plaster .

[whitebeam]

I'd be using some powdered addy for the tile on tile

[Dave]

You will find that with the larger tiles on a substrate that isn't porous you will have to leave a lot longer to dry , as dispersion adhesives need contact with the air and a porous biscuit and background to set.

For this reason among others i do not use tubbed gear...

[Davesax]

OK Thanks , what would be a good cement based to use on the non porous walls , ie tiles and tanked? ... and do I still need larger trowel or are we talking smaller?
Scuse my ignorance

[pjc]

it could be 2 weeks before that adhesive would be dry IMO as whitebeam suggests cement based would be your best bet :Pete