Travetine stone onto floorboards

[itaylort]

Any Ideas where look up ditra for costings:hurray:

 

[GazTech]

CTD | home

 

[grumpygrouter]

Not really, i imagined about 30 mm rise for the floor. I am really just trying to get it straight so that i can move on and get the floor done:8:
i wouldnt want it to fail and start cracking tiles. The durabase seems the more flexible option and with the addition of being waterproof s i think i will gor for that. A bit steep at £165 tho.

Not cheap I grant you and Ditra is no cheaper but how much would it cost to have to rip the floor up and start again if it did crack? I know my method is belt and braces but with stone (soft at that!) can you really take the chance? The issue really Ian, as far as I see it is that you have underfloor heating and you really need to islolate your installation from lateral movements in the substrate. A decoulping membrane will give you far and away the best schance of doing that.

 

[itaylort]

Cheers Grumpygrouter,

Its seems a good product and very attractive considering the end result of not using it would be cracked tiles.
Just to confirm tho i do not have any underfloor heating going in.

Ian

 

[grumpygrouter]

Cheers Grumpygrouter,

Its seems a good product and very attractive considering the end result of not using it would be cracked tiles.
Just to confirm tho i do not have any underfloor heating going in.

Ian

My mistake Ian, sorry I was confusing this with a similar thread. My method still applies though.

 

[itaylort]

Grumpyfrouter,

Is this, out of interest going to be the same process for ceramic tiling with the membrane?

 

[grumpygrouter]

Will get away with not using the membrane if you wish Ian, if you lay ceramics.

One thing I didn't mention previously is that you will need to seal the back and sides of the ply before laying. Depending on the adhesive you choose, depends on what you should seal it with.

 

[itaylort]

Crikey grumpygrouter this is indeed an in depth knowledge type job:whatchutalkingabout

What would you suggest for the adhesive and in turn the sealant?
Also can you over seal the top of ceramics like stone? To protect grout discoloring from traffic?

Ian

 

[grumpygrouter]

Crikey grumpygrouter this is indeed an in depth knowledge type job:whatchutalkingabout

What would you suggest for the adhesive and in turn the sealant?
Also can you over seal the top of ceramics like stone? To protect grout discoloring from traffic?

Ian

If you choose to use BAL adhesive Ian, you will need to seal the ply with BAL Bond SBR. with 18mm ply you can use single part flexible adhesive or the rapid set equivalent. With anything less than 18mm ply BAL recommend Fastflex as the appropriate adhesive. My own personal choice (though I can't get it anymore) is Ardex-flex 7001. If you decide on this, you will need to seal the ply as previously mentioned with polyurethane varnish, you will also need to prime the tiling face with Ardex P51 primer.

There is no need to seal ceramic tiles and the grout sdhouldn't discolour form traffic if you don't use a light colour. Mapei Ultracolour plus is excellent in this respect.

 

[itaylort]

Grumpygrouter,

Seal the underside and edges of the 18 mm ply? Not the tilied side of the board, if this is correct can you tell me why you seal the down side,?

There must be another marvellous snipit of experience coming?


Ian

 

[GazTech]

Grumpygrouter,

Seal the underside and edges of the 18 mm ply? Not the tilied side of the board, if this is correct can you tell me why you seal the down side,?

There must be another marvellous snipit of experience coming?


Ian

Hi Ian,
Sorry to disturb you affair with Grumpy , but it is recommended to seal the rear and edges of the board to prevent moisture twisting or warping from the rear. Some manufacturers will say seal the tiled face, but we at Bal don't with our products.......Gaz

 

[itaylort]

Gaz,
That makes sense,:hurray:

Thanks for the input,

Ian

 

[GazTech]

Gaz,
That makes sense,:hurray:

Thanks for the input,

Ian

No problem Ian,
I have seen problems because vent or air bricks under timber floors have blocked or removed or rendered over, causing moisture to attack from beneath and undermine the plywoods integrity. This however does not effect cement based backerboards, I feel will be the replacement for ply when tiling onto timber, 10mm minimum when using single part or rapid flexible....that knocks 8mm off the ply height.

 

[itaylort]

Hi
Just ordered 3 sheets of 8 x 4, 18 mm ply . Going to get some BAL BOND SBR to seal the back and sides as you recommended.
What sort of coverage can i get out of this, and is it a neat apply or thinned.
Topps sell it in 1 litre or 5 litre.

We are going with ceramics now after all.

Ian

 

[itaylort]

Hi again,

Seen ther mapei ultracolour on screwfix and it comes in 5kg bags, does anyone know what sort of area this would cover?
Also is there a good adhesive to use from there so i can order all in one go, single part flexible adhesive was suggested but the description on there doesnt go into that detail

Many thanks

Ian