Granite tiles on ply wood floor

[BARONARMY]

Hi Guys

Just want to pick your brains if i may...

I have a bathroom floor that has had the floor boards ripped up and replaced with 18mm marine grade ply. The floor area is about 2.5M x 2.5M. My question is the ply is not one sheet and as 2 smaller cut outs, could this cause me any problems in the future with any joist movement ???

Also if you could recommend a good adhesive for the granite tiles and also what size notch trowel to use ?

Keep up the good work and thanks in advance

Gavin

 

[DHTiling]

Hi Gavin and welcome..

Are these true granite or composite..?

 

[BARONARMY]

sorry....

Also, can a 2mm spacer be used with black grout on the tiles ???

 

[BARONARMY]

True granite, calibrated ?

 

[The Legend; Phil Hobson RIP]

:welcome:Gavin, to the TF. Same question as Dave from me

 

[DHTiling]

Ok.. Alkaline resistant joint tape for the board joints and then an S1 adhesive to stick the tiles.. 3mm joint is BS standard.

 

[The Legend; Phil Hobson RIP]

My slow typing again😳

 

[BARONARMY]

Thanks for your responses on this Dave and Phil

Any recommendations on the the trowel size to use ??

 

[The Legend; Phil Hobson RIP]

Solid bed 10mm better yet 12mm, half moon trowel, and back skim tiles, with flat edge of trowel imo

 

[BARONARMY]

Thanks guys, one last question. S1 adhesive, is this a type of adhesive that is produced by various manufactures ? ie google brought loads of different S1 adhesive products up...

will this do -Mapei Keraflex Maxi Flexible S1

 

[The Legend; Phil Hobson RIP]

I prefare Mapei Keraquick with latex plus, just my opinion, awsome stuff.

 

[BARONARMY]

excellent, then thats what i will go with... Thanks again lads, i will hopefully sleep better tonight and with less tiling questions going through my head 🙂

Keep up the good work

Gav

 

[Pebbs]

Check your tiles before you start laying, as you may find they are running out of calibration, youve not said what the format size is. If they are running out a couple of mm, then your better of not going with that 2mm joint, Id reckon on a 3mm joint, and im with Phil go for Mapei Keraquick with Latex Plus, little bit more costly but well worth the money.
Pebbs

 

[BARONARMY]

Hi Pebbs

Your right about the calibration as some of them are out, if layed on top of each other some look as if they are warped or out by a 1mm or 2mm. I think 3mm it is then for the spacer, i was going for a minimal grout look to show the tiles off butt 1mm isnt going to hurt.

Just been checking the data sheet for Mapei Keraquick, it recommends a upto 7mm bed, Phill is saying use 10mm or 12mm bed. Will 7mm do ? or go for a different adhesive that will take the thicker bed ?

Gav

 

[Pebbs]

Gav, have you checked your levels? 7mm is fine if your levels are ok on the floor.

Pebbs

 

[david campbell]

a 10/12mm trowel will not giive you that depth of bed it will be reduced by about 1/3 by the time you have pressed the tile firmly into the adhesive

 

[BARONARMY]

sorry forgot to say the format is 400x400

 

[The Legend; Phil Hobson RIP]

Sorry Gav, I did not make myself clear, a 10mm/12mm trowel will not give a 10mm/12mm bed, as David says above. The trowel notches will give you a solid bed of 3mm to 5mm of adhesive when pressed or tapped in with a rubber mallet/ hammer.