Marble Tiling

[gltiling]

A friend of mine is tiling 4 bathrooms with 600 x 400 marble in his house.Part of the shower cublicles are finish in plywood. I advised him he might need to prime the ply,he's using BAL Single Part Flex Adhesive.
Does he need to Prime before fixing?
Also he's told me the marble was pre-sealed in the factory where he works,will he need to seal after grouting?

[wetdec]

Hi

The ply will need priming as per adhesive manufacturer.

An uncoupling membrane is recomended when stone is going onto wood and new screeds.......... Due to the stones make up it has weaknesses which are easily effected by latteral movement causing cracking.

Another consideration has to be weight as if it is Marble it will be cut at thicknesses over 15mm so heavy.

Pre-sealed stones are few and far between however there are stones pre-sealed with lithofin available...........The floor will need sealing again when finished............NOTE check what sealer has been used so you can finish with a compatible one


tiler

..

[gltiling]

What kind of weight considerations does he need to take into account. I think the marble is 20mm thickness.
Is there anything he needs to look out for as I imagine the weight of the marble is going to make it difficult to securely fix on the walls

[TilingLogistics]

If he is fitting those tiles on the wall I would guess each one weighs around 18KG. Easy to check just weigh one! If I am right this means that they are around 60KG M2 that is too heavy for plaster and plasterboard and don't forget I have not taken into account the adhesive and grout. So I think he is going to need cement backer boards or similar


The Max weight for plaster is 20KG per M2 and plasterboard is 32KG M2

Kev

[wetdec]

What kind of weight considerations does he need to take into account. I think the marble is 20mm thickness.
Is there anything he needs to look out for as I imagine the weight of the marble is going to make it difficult to securely fix on the walls

And who sold him these tiles the company he works for ??? What marble is it m8


tiler

..

[gltiling]

Is the marble too heavy for the cubicles that are finished with the ply.
The ply is screwed on to a 4x2 frame similar to a stud wall. I think the ply is roughly 15mm.
Most of the other wall are solid concrete block

Thanks for all this info btw,its very much appreciated

[MICK the Tiler]

....................And don't forget your drop sheets when doing the walls marble scratches easily.

[gltiling]

AFAIK the tiles were imported into the factory from Spain,not sure what type of marble it is, what is m8?

[MICK the Tiler]

M8 is short for "Mate"

L8 = "Late"

Str8 = Strait

H8 = Hate

W8= wait

G8 = Gate

Cr8 = Crate

[gltiling]

of course,bit slow today,

[MICK the Tiler]

GR8 M8 never to L8

PMSL!!

[wetdec]

Lets go back slightly and get the whole picture here shall we ? we have dribs and drabbs so is difficult


Walls are made of ??

Floors are made of ??

Cubicles are showers ??

Same Marble on floors and walls ??


tiler

[gltiling]

Walls- concrete
floors- shuttering ply
cubicles- concrete and on one side stud wall/ply
same marble on floors and walls

[wetdec]

Walls- concrete
floors- shuttering ply
cubicles- concrete and on one side stud wall/ply
same marble on floors and walls

Walls- concrete - Tile with a hydraulic adhesive Best ask one of the Bal guys which would serve you best

Floors- shuttering ply - Prime lay an uncoupling membrane such as Dura-ci to prevent cracking then a good flex to lay tiles (white)

Cubicles - tank walls with a membrane onto base with showerlux trim to waterproof correctly then tile as walls above.

I would not be happy putting this weight on walls, where adhesives may bond well and fixing be correct you are reliant on the substrate !!!!!!


Hope this helps


Tiler

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[whitebeam]

If he is fitting those tiles on the wall I would guess each one weighs around 18KG. Easy to check just weigh one! If I am right this means that they are around 60KG M2 that is too heavy for plaster and plasterboard and don't forget I have not taken into account the adhesive and grout. So I think he is going to need cement backer boards or similar


The Max weight for plaster is 20KG per M2 and plasterboard is 32KG M2

Kev

And hardie backer will take only 45kg m2 12.5mm

[garythetiler]

if you are concerned with the weight i would tie the marble to the wall with stainless steel wire drilled into the stone and screwed to the wall this is standard prctice in the stone industry i would probably only do this on the ply as a good adhesive such as pci nanolight will take 60kg per sq m and if the wall are put up plumb the load bearing issue is greatly reduced imo