basic advise sought please

[Little5]

Hi is there a concern puting up fairly large ceramic tiles 90 x 30 onto recently fitted plasterboard walls.
also how quickly can you grout after sticking wall tiles.
can floor tiles be put onto recent built floor, made up of chipboard flooring and 6mm ply.?
thanks

[Dave]

You might find those tiles are tooooooo heavy for plasterboard...

[GazTech]

Your wall tiles are too heavy for the plasterboard, and your adhesive for fixing floor tiles should be 2 part flexi.....Gaz

[sstilingservice]

Hi Little5

If you are tiling onto just plasterboard ie board not new plaster then this can be done striaght away no prob as far as I know. But if it's fresh plaster then this needs to be fully dry . I never grout the same day as I fit the tiles if you can leave it a day or 2 this will help the adhesive to fully cure . There is nothing wrong with laying tiles onto a newly built floor just make sure there is not to much bounce in it and ply it accordingly to stop tiles cracking .

[Droopy]

They weight of the tile (per sqm) depends on how thick it is, not how big it is.

if it's 12mm thick, even if it was porcelain, you will be within weight limits.

12mm ceramic is around 28-29kg/sqm including a solid bed of cement based adhesive.

[sstilingservice]

Just seen what you guy have I read it as 90 x 30 now looking again I think you chaps are right and 900x300 biggggggggggggg tiles

[Little5]

Many thanks all
stupid question but other than immediately falling off, what else can happen?
can the weight cause cracks in grout?
also what do you mean 2 part flexi?
should the ply which is 6mm be screwed more than at edges?

[Droopy]

Many thanks all
stupid question but other than immediately falling off, what else can happen?
can the weight cause cracks in grout?
also what do you mean 2 part flexi?
should the ply which is 6mm be screwed more than at edges?

2 part flexi is an elastomeric adhesive that comes, as the name suggests, in two parts.
A bag of powder and a bottle of liquid.

How thick are your tiles?
Unless they are around 14mm thick, they will not be too heavy for plasterboard.

You will need to fix them with a cement based Single part flexi, so setting time will be around 3hrs if a rapid set, and 16 hrs if a standard set.
And use white adhesive if you are using a light coloured grout.

[Little5]

they are about 10mm ceramic.
If weights ok should the grout not crack?
should i grout the same day as i stick or leave if for how long?

[GazTech]

2 part flexi is an elastomeric adhesive that comes, as the name suggests, in two parts.
A bag of powder and a bottle of liquid.

How thick are your tiles?
Unless they are around 14mm thick, they will not be too heavy for plasterboard.

You will need to fix them with a cement based Single part flexi, so setting time will be around 3hrs if a rapid set, and 16 hrs if a standard set.
And use white adhesive if you are using a light coloured grout.

Also prime the plasterboard with 2 neat coats of acrylic primer, screws in the plywood should be a minimum of 300mm centres....Gaz

[GazTech]

they are about 10mm ceramic.
If weights ok should the grout not crack?
should i grout the same day as i stick or leave if for how long?

Have you fixed them already mate ?

[Droopy]

they are about 10mm ceramic.
If weights ok should the grout not crack?
should i grout the same day as i stick or leave if for how long?

AS Gaz said, remember and prime.

If you use a rapid set, then yes you could grout the same day. (3hr setting time)
If you use a standard set, then 16 hrs before you can grout. So next day will be fine.


DO NOT use a ready mix for a tile this size.