Retro fit ufh & Hydrogen gas causes floor failure.

[J Sid]

his done that Andy, just hasn't posted the pics yet

 

[Ajax123]

The calcium hydroxide aluminium reaction is fairly basic chemistry. The same thing happens when you put calcium sulphate direct to aluminium. Priming has generally proven to be ineffective in preventing the reaction so the best thing js to avoid it altogether by either not using aluminium or putting a slip membrane down first.

 

[Old Mod]

The calcium hydroxide aluminium reaction is fairly basic chemistry. The same thing happens when you put calcium sulphate direct to aluminium. .

So using an anhydride screed over aluminium would result in the same reaction Alan yeah?

So would that translate in to any anhydride suitable products like Anhyfix adhesive, or Anhylevel have the same reaction? Just trying to clarify.

Priming has generally proven to be ineffective in preventing the reaction

I know you know you're correct, but we can definitely confirm that, through our research we found that a lot of priming methods were ineffective.

Any further info would be helpful Alan, thanks.

 

[Dumbo]

Typical companies releasing products onto market without proper research or testing just to make money and leaving end user to clear up the mess .

 

[Flintstone]

is af200 cement based ?

 

[Old Mod]

Typical companies releasing products onto market without proper research or testing just to make money and leaving end user to clear up the mess .

That not strictly true in this case tho.
They give clear instructions on how it should be dealt with.
You just have to read them and not make up your own interpretation.

 

[Old Mod]

is af200 cement based ?

What's the relevance Adndy?

 

[Spud]

So using an anhydride screed over aluminium would result in the same reaction Alan yeah?

So would that translate in to any anhydride suitable products like Anhyfix adhesive, or Anhylevel have the same reaction? Just trying to clarify.




I know you know you're correct, but we can definitely confirm that, through our research we found that a lot of priming methods were ineffective.

Any further info would be helpful Alan, thanks.

I read some articles which stated the only primer or barrier to the reaction was bitumous based,even silicone barriers didnt stop the reaction taking place , pretty pointless priming with bitumen if you are using ufh, thanks for your help Alan that cleared a couple of questions up Marc and I were considering ?

 

[Dumbo]

So cold an adhesive like ba

That not strictly true in this case tho.
They give clear instructions on how it should be dealt with.
You just have to read them and not make up your own interpretation.

But according to ajax it would fail even if primed or do the products they recommend not contain cement or andhydrate

 

[Italy]

How many problems do you have ..
Do, as I did,
place, a concrete panel 6mm. (Without adhesive).
Tape on junctions.
And use epoxy adhesive.
that's no good?

 

[Flintstone]

What's the relevance Adndy?

Weather an option for sucessful install would be ditra over the foil with af? Not in this instance obviously

 

[J Sid]

How many problems do you have ..
Do, as I did,
place, a concrete panel 6mm. (Without adhesive).
Tape on junctions.
And use epoxy adhesive.
that's no good?

a floating floor then Antonio, yes?

 

[Italy]

a floating floor then Antonio, yes?

yes

 

[Old Mod]

So we're working through all your questions one by one whist trying to research at the same time. Bear with us guys.

 

[hmtiling]

What about an epoxy primer as a barrier?