weberset spf question

[what]

Is weber spf recommended for porcelain tiles on ditra (floor) and also mapei aquadefense (wall)

 

[J Sid]

wouldn't use spf on ditra only because if it sticks to the orange the ditra will not work as a uncoupling membrane

 

[what]

But does spf actually stick or bond to the ditra plastic waffle not just been held in place when cured by the dovetail effect?

 

[J Sid]

shouldn't stick but might and is not needed

 

[what]

What makes you think that that could be a possibility which is not shared by other brands?

 

[J Sid]

Schluter say don't use highly modified adhesive on ditra, but if in doubt send them an email [email protected]

 

[SJPurdy]

wouldn't use spf on ditra only because if it sticks to the orange the ditra will not work as a uncoupling membrane

"Immediately after the Schluter -Ditra 25 matting is installed, the tiles can be set using the thin bed method and using a bonding tile adhesive that matches the requirements of the covering." Copied from Ditra 25 data sheet (6.1). Therefore as a modified (SPF) adhesive required for the porcelain tiles Shluter are saying to use it!

 

[J Sid]

"Immediately after the Schluter -Ditra 25 matting is installed, the tiles can be set using the thin bed method and using a bonding tile adhesive that matches the requirements of the covering." Copied from Ditra 25 data sheet (6.1). Therefore as a modified (SPF) adhesive required for the porcelain tiles Shluter are saying to use it!

you missed copying
"Using the thin-bed method and following all applicable industry standards, set the tile or stone covering directly on the Schlüter®DITRA 25 in such a way that the tile adhesive becomes mechanically anchored in the square, cut back cavities of the Schlüter®DITRA 25 matting.

notice the mechanically anchored and not chemically fixed.

but if fitting, say gulf stone who recommend a two part adhesive or the TM equivalent as favoured by many members on here, Schluter say you mustn't use these adhesive on ditra due to these adhesives bonding / chemically fixing to the plastic and stopping the product uncoupling.

Also care should be taken if laying tiles "immediately" after laying the ditra. un-cured adhesive sticking the ditra mean tiles can't be lifted without pulling the ditra up.

 

[what]

I have spoken to Weber and they say it is suitable for Ditra 25 - does anybody have any experience to the contrary?
Would Weber set plus be a more suitable alternative

 

[what]

"TM equivalent as favoured by many members on here"
what would that be?

 

[J Sid]

I have spoken to Weber and they say it is suitable for Ditra 25 - does anybody have any experience to the contrary?
Would Weber set plus be a more suitable alternative

its the one I use.

 

[hmtiling]

It's my understanding that Weber spf(s1) is fine with ditra and it's s2 adhesives that are too polymer rich and risk bonding to the plastic

 

[hmtiling]

"TM equivalent as favoured by many members on here"
what would that be?

Tilemaster ultimate s2. Using it at the moment and it's quick

 

[J Sid]

"TM equivalent as favoured by many members on here"
what would that be?

ultimate S2 I think it's call

 

[J Sid]

Tilemaster ultimate s2. Using it at the moment and it's quick

to quick

 

[hmtiling]

I'm not one of the members who'd use it with gulf stone though. Bag and bottle for me

 

[J Sid]

Tilemaster ultimate s2. Using it at the moment and it's quick

what you using it to fix Harry?

 

[hmtiling]

what you using it to fix Harry?

It's overkill but a failed floor. Part screed(traditional) and part ply. Ultimate underneath and above decoupler

 

[hmtiling]

And a soft joint before anyone says anything

 

[J Sid]

And a soft joint before anyone says anything

goes without saying

 

[SJPurdy]

you missed copying
"Using the thin-bed method and following all applicable industry standards, set the tile or stone covering directly on the Schlüter®DITRA 25 in such a way that the tile adhesive becomes mechanically anchored in the square, cut back cavities of the Schlüter®DITRA 25 matting.

notice the mechanically anchored and not chemically fixed.

but if fitting, say gulf stone who recommend a two part adhesive or the TM equivalent as favoured by many members on here, Schluter say you mustn't use these adhesive on ditra due to these adhesives bonding / chemically fixing to the plastic and stopping the product uncoupling.

Also care should be taken if laying tiles "immediately" after laying the ditra. un-cured adhesive sticking the ditra mean tiles can't be lifted without pulling the ditra up.

I just checked the Schluter web site installation instructions for ditra 25 and it is still as I stated. I understand what you are saying regarding not to bond to the plastic (with for example a two part addy) but there is still no warning in the online fixing instructions.