Tiling onto Ply, can it be a success?

[Old Mod]

I have read a lot of conflicting opinions on using S2 over Ditra. I decided to go with Ultimate S2 as I read US and UK specs are different and S2 is suitable according to UK spec.

I’m afraid you are mistaken. An S2 adhesive is NOT suitable if you follow schluters guideline.
They WILL NOT honour any guarantees.

 

[charliesw4]

I’d personally ditch the ditra and overboard with 6mm Hardie. S1 adhesive is fine.

 

[Old Mod]

... and to be honest, you’ll struggle to use Ultimate and not throw most away.
And to use that over top of Ditra, you’ll be lucky to return 3m2 a bag.
You’re looking at approx 15 bags to be sure you have enough.

 

[Boggs]

What’s the reason for S2 being unsuitable?

 

[Old Mod]

What’s the reason for S2 being unsuitable?

In a nutshell it’s too deformable.

 

[Boggs]

Ah, you live and learn.

 

[Old Mod]

Ah, you live and learn.

Get yourself on schluters wet room course.
It’s free if you’re tradesman on the forum.
Go to their website and look under the training sections.
It’s in the Leicester area, crikey, just up road from you! Haha
No excuses, you don’t have one.
You won’t regret it.

 

[AD1]

So ... unfortunately I can't take the Ultimate S2 back. I understand using this could result in a failed floor. But what's the chances? ..

Is it worth the risk?

 

[Boggs]

I would but it’s finding the time!

 

[Old Mod]

So ... unfortunately I can't take the Ultimate S2 back. I understand using this could result in a failed floor. But what's the chances? ..

Is it worth the risk?

What’s your reasoning for wanting to continue to use it Adam?
It’ll be difficult for you to use.
You’ll be throwing away a substantial refund, and if it fails it’ll cost you double.
It’s the wrong adhesive according to Schluter.

I personally find it difficult to argue against.

If the store recommended the adhesive, it’ll be obliged to refund you, I’m sure.
It’s not fit for purpose

 

[Old Mod]

I would but it’s finding the time!

You arrive tea time first day, meet and greet and dinner nearby.
Browns restaurant I believe it is now. (Trendy Gin bar) good food good company.
9 o’clock start next day, finish at 4.
Whatwas that about not having the time?

 

[Boggs]

I agree with the above, I use it on all my timber floors and it’s a right pain to use.
You have to be quick and work very cleanly as it’s a pain to get off areas you don’t want it when it’s set.

 

[Flintstone]

It's very un- user friendly and gloopy and it's consistency changes loads as you use it. Serously, take it back to the shop!

 

[J Sid]

if you insist on using the S2 send Schluter an email to get confirmation that it suitable and will not invalidate your warranty.
I totally agree with @3_fall and have been told it can't be used.

 

[Boggs]

Standard Setaflex is much nicer.