Bardon High Flow Screed - help needed

[chrissie275]

I need some help!

Read lots of scary screed stories on this forum, and still a bit confused . . . .

Had a Bardon High Flow Screed pumped into a new kitchen / utility / study extension on the 18th November 2013 and had a dehumidifier working for the past 6 weeks to help dry it out.

I'm hoping to have it tiled soon with Polyflor Vinyl Tiles (LVT) and so . . . . .

1. Just what primer and adhesive should the tiler be using? and
2. Have brushed off the surface crust, but do I need to do more preparation?

Not had much assistance from Bardon's just been passed around a bit and the flooring people haven't tiled on this type of screed before. Apparently they would normally use 'P131" primer - can anyone tell me whether this is the right thing to be using or if not, why not?

I'd be grateful for any advice - although in simple terms please, as I'm easily confused!!

 

[Stef]

I take it this is an anhydrite screed or should I say a calcium sulphate screed.
Not sure about vinyl tiles but if I was tiling this then I would be using a Gypsum compatible adhesive such as TileMaster AnhyFix & priming it with one coat of PrimePlus mixed at a 4 in 1 ratio.
This floor "must" be sanded to remove the laitance from the surface, hoovered then primed.

 

[Ajax123]

It is anhydrite screed. Anhyfix is not appropriate for vynil tiles. P131 is fine but you need to consider carefully the levelling compound and ideally used one that is compatible e.g. Anhylevel or stopgap 1200 or such likes.

 

[chrissie275]

Hi guys, thanks for your help on this one. Ajax, we were assuming that all we would need was a primer/sealer (P131) - after sanding and hoovering, then the tiles would go down over that (with appropriate adhesive) as the flow screed is level? Am I still missing something?

 

[Ajax123]

Hi guys, thanks for your help on this one. Ajax, we were assuming that all we would need was a primer/sealer (P131) - after sanding and hoovering, then the tiles would go down over that (with appropriate adhesive) as the flow screed is level? Am I still missing something?

No that's fine. It's just that most commercial layers of these types of tiles insist on a levelling compound regardless of it being needed or not. If you are putting them down and are happy the screed is flat go for it.

 

[Stef]

No that's fine. It's just that most commercial layers of these types of tiles insist on a levelling compound regardless of it being needed or not. If you are putting them down and are happy the screed is flat go for it.

Alan sorry to go off thread, I had your number in my Phone & don't have it now,
Looked at a pool surround today, 55m2 it's a calcium screed, I know it shouldn't be near a wet environment but the guys been told a couple of coats of water based epoxy primer will suffice.
I advised it should be tanked but they are running out of money.
Its been tiled already & they lifted through ettringnite crystals forming & never been sanded.
It was a cement based adhesive that was used.
The screed was laid 3 years ago, what do you think?
I'm a bit dubious but he's been recommended me..

 

[Ajax123]

Alan sorry to go off thread, I had your number in my Phone & don't have it now,
Looked at a pool surround today, 55m2 it's a calcium screed, I know it shouldn't be near a wet environment but the guys been told a couple of coats of water based epoxy primer will suffice.
I advised it should be tanked but they are running out of money. 
Its been tiled already & they lifted through ettringnite crystals forming & never been sanded.
It was a cement based adhesive that was used.
The screed was laid 3 years ago, what do you think?
I'm a bit dubious but he's been recommended me..

oh holy crap.... Do you know who screeded it?? Where in the country is it?

btw my number is below...

 

[Stef]

oh holy crap.... Do you know who screeded it?? Where in the country is it?

btw my number is below...

Alan not sure who the contractor was. Got told by the guy that it was laid 3 years ago, he lives in Craigie, a small place in east Ayrshire.
I can't see your number as I use Tapatalk on my Phone..

 

[Ajax123]

Alan not sure who the contractor was. Got told by the guy that it was laid 3 years ago, he lives in Craigie, a small place in east Ayrshire.
I can't see your number as I use Tapatalk on my Phone..

my number is 07966651006 give me a call on Monday if you like and I'll go through options with you... It's not a great situation though...

 

[Stef]

my number is 07966651006 give me a call on Monday if you like and I'll go through options with you... It's not a great situation though...

Thanks Alan, tried telling the client this but he's quite adamant that with 2 coats of epoxy primer it will be fine.
Speak to you on Monday.
Thanks again..

 

[chrissie275]

Thanks Alan, feeling a lot happier than I was a couple of days ago! Much obliged to you.