Retro fit ufh & Hydrogen gas causes floor failure.

[Old Mod]

On that stuff two coasts of Multi Surface Primer (treat the aluminium as a tile surface) would be appropriate?

I'm not going to generalise Mark as this is such a delicate system when all said and done, so check with the manufacturer that it meets the requirements.
Not all primers are suitable.

 

[Mark Frost]

This isn't the first one I've seen fail. This is the 3rd. Thankfully I've not come across this wundafull stuff.

 

[Flintstone]

I haven't seen one in the flesh but i would be very very careful about tiling over this sort of system or any other retro fitted wet ufh for that Matter

 

[Old Mod]

In the main Andy there's a fairly standard way of dealing with them now, it's taken a while, but most agree now.
Manufacturers and adhesive companies.
And I say that with trepidation tbh, cos the goal posts get moved a lot.

 

[Andy Allen]

What's next mate......
Finding the missing Malaysian plane flight MH370..🙂

 

[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 ?