Failed anhydrite floor

[TT Tiling]

sad to see that ,im laying on them floors every week ,with no probs ,dry them out till they are bone dry ,good sealer ,happy days

 

[thompsonbrown]

Looks like primer was laid before screed was dry, Adhesive looks like it took to primer.
Big area for no expansion 2mm spacers?
Could be a number of things. Looks like a total ripout to be safe.

 

[Stef]

I had bother with primer on top of Gyvlon a few weeks back,
That primer looks like a neat coat & has just came away like a skin.
Should only be 1 coat of primer at 3:1.
As you say John, it will be an easy rip out.

 

[John Benton]

I had bother with primer on top of Gyvlon a few weeks back,
That primer looks like a neat coat & has just came away like a skin.
Should only be 1 coat of primer at 3:1.
As you say John, it will be an easy rip out.

That was my thought Stef, don't have a pic of what was left on the floor but I suspect very little of the primer as it's still stuck to the adhesive. As you say the first coat would have probably been sufficient and was a little confused when the screeding contractor had told the builder to put a 2nd coat of neat primer over the top. This would have formed a skin and therefore the probable cause of failure.

 

[Chalker]

That was my thought Stef, don't have a pic of what was left on the floor but I suspect very little of the primer as it's still stuck to the adhesive. As you say the first coat would have probably been sufficient and was a little confused when the screeding contractor had told the builder to put a 2nd coat of neat primer over the top. This would have formed a skin and therefore the probable cause of failure.

Don't know but is it possible to be too dry?? This might absorb all the fluid, thus leaving a skin?

just a thought?..

 

[Stef]

John I used AnhyFix & should have done a test area without primer.
It states a 3:1 coat though.
The tapers had been in taping the ceilings & had dropped (as they do) a fair amount of fast set onto the floor & I was struggling to knock it off with a scraper.
I think we are going to see a lot of failures coming up with Calcium screeds.

 

[Gazzer]

John I used AnhyFix & should have done a test area without primer.
It states a 3:1 coat though.
The tapers had been in taping the ceilings & had dropped (as they do) a fair amount of fast set onto the floor & I was struggling to knock it off with a scraper.
I think we are going to see a lot of failures coming up with Calcium screeds.

Didnt you sand the floor 1st ?

 

[Stef]

Didnt you sand the floor 1st ?

This was before the floor was sanded.
I was tiling the walls at the time & the floor must have been registering + 90 rh at that time.
I couldn't believe how much of a bond it had achieved to the screed.

 

[John Benton]

Just add to this one John, it'll keep all the info in the same place for future reference.

Did it straightaway Bri, can you merge the 2?

http://www.tilersforums.com/tiling-forum/71268-another-floor-failure.html

 

[Ian]

Did it straightaway Bri, can you merge the 2?

http://www.tilersforums.com/tiling-forum/71268-another-floor-failure.html

Just on my way out the door John, I'll do it later. It's easy enough.

 

[the diving tile]

Get a core sample of the floor tested, have come across two floors here where the screed was at fault a bit like tiling on bonding, lime is a pain in the ***

 

[Ian]

Thanks to whoever merged the two threads.

 

[Gazzer]

Thanks to whoever merged the two threads.

 

[Ajax123]

Get a core sample of the floor tested, have come across two floors here where the screed was at fault a bit like tiling on bonding, lime is a pain in the ***

Tested for what??

 

[the diving tile]

Tested for what??

Sand/ binding agents or just to rule out the screed