limestone

[melanie01]

hi all

can anybody advise me on the folowing please?

i am laying a limestone floor with different thickness tiles ranging from 35mm-45mm thick.

my base is concrete with piped underfloor heating with screed on top followed by a detra matt membrane.

my question is can i spot dob the tiles to get the level as aposed to buttering both floor and tile that i have read on the forum?

thanks gutys

[kilty55]

hi melanie,if you do this method your floor will fail

are you a tiler? if not i advise you get a pro in

[Sir Ramic]

Dot and dab is a big no no, the tiles will crack and you will have hot spots on the floor. You need a solid bed under the tiles.

[Dave]

As above on the fixing method..

what limestone is it, to be that thick?

[Gall.B]

As above, get an experienced Tiler who specialise in stone in, a lot can go wrong with a Limestone floor & dot dabbing is a huge NO.

[doug boardley]

as all above, solid bed is a must. Best way is to grade your tiles in thickness and start off with the thicker ones first and build the adhesive bed up as you come to the thinner ones.....as Dave says, very thick slate, (I'm sure I heard his back groan )

[pjc]

sounds more like sandstone any pics ?

[melanie01]

hi all

can anybody advise me on the folowing please?

i am laying a limestone floor with different thickness tiles ranging from 35mm-45mm thick.

my base is concrete with piped underfloor heating with screed on top followed by a detra matt membrane.

my question is can i spot dob the tiles to get the level as aposed to buttering both floor and tile that i have read on the forum?

thanks gutys

thank you for the quick reply guys

the stone is reclaimed, i was told that as the stone was so thick it would not matter about dobbing tiles by the manufacturer ? also he has supplied me with white single flexable adhesive is this correct? so many conflicting advise from manufacturer.

[Waimzer]

you will still want to have a full bed of adhesive below those tiles, especially because of the underfloor heating. As someone said the heat distribution will be un-even otherwise, let alone the fact voids in the adhesive bed will lead to cracks! They are correct in supplying you with a white flexible adhesive, fast set is recommended with natural stone however single part will still do the job, Dont know what make adhesive you have however.

[deanotile]

thank you for the quick reply guys

the stone is reclaimed, i was told that as the stone was so thick it would not matter about dobbing tiles by the manufacturer ? also he has supplied me with white single flexable adhesive is this correct? so many conflicting advise from manufacturer.

Is it French by any chance ?

[Dave]

But is it Limestone though..?

[pjc]

who it from and what is it called

[Topshop]

I agree with all above - you need a solid bed under any stone whether you have heat under it or not. Especially with heat you will get uneven heating with voids.

[Daz]

That will need to be a very stiff mix if you plan to build those suckers up, too. The weight of the tiles will undoubtedly cause slumping and therefore lippage.

You need a solid bed under the tiles so don't dot & dab either.

Daz

[SJPurdy]

Ensure the adhesive can be used at the thickness you require. If youv'e got only 3mm under the thicker tiles you will still need 13mm under the thiner ones to keep the surface level. Many basic adhesives should not be used at this thickness whereas others can be used at greater thicknessess.
Steve