1k turbo coming of screed

I did a job at Christmas the screed was wet 88 - 90% so I 2 coated mapei 1k turbo, I swept and hovered the floor and used a little rad roller for the perimeter and a 12 inch roller for the main area ( it wasnt to thick and never blistered or bubbled ) taking the 1k turbo from a paint tray rather than pour onto floor and then roll out then latexed with screed master 2, f46 then karndean van gogh, but I got a call from them today so poped round because of 3 raised areas about 12 inch by 4 inch, I removed one plank and the latex had blown not a real problem I know but then noticed the 1 k turbo was loose and I could peel some up but it had about 1 - 2mm of sub floor screed stuck to it I've never had a problem with 1k turbo and never seen it like this the sub floor screed When rubbed with a knife just crumbles to powder the piece of turbo I took up like I said has screed stuck to the bottom of it and when I rub it all screed rubs off leaving a thin film of 1k turbo, has anyone had this or know if it's something I have done or would a very week screed mix cause it

 

I wouldn't be surprised if it was the weak screed. Why was it so wet mate? Just drying out or old floor?

 

I've put a latex on a screed which was like that once, told the builder it was too soft, he wouldn't listen, the whole latex cracked. Won't be doing that again.

 

It was a new extension was about 9 weeks old

 

I take it that is well thin because when I've rolled 1k on it almost isn't visible it's so thin.

 

Yeah it's really thin it's like rice paper maybe 1/4 mm thick if that, like you said was almost invisible when rolled on

 

I've just noticed its 2 coats! One of the Amtico fitters I use to work with would always whack the screed with a hammer and if a big bit Come off he would dig it out and re do it with one of the Ardex products. A33 or 35 I think.

 

Did you put 1k straight on to the builders screed or onto a compound you put down?
If straight onto builders san/cement screed then it could be coming off because of the laitence (crust on the surface) which should be ground off first.

Just re-read your post - it was 1k on to builders screed - bet its the laitence.
Did you grind it first?

 

I always run over a screed with my buffing machine with 40 grit paper on and never had this before, do you mean this or like a poor grinder / scrabbler ?

 

This is all new to me as never had it what action should be taken next, the customer has a list as long as her arm of things the builder has bodged can I get it tested can the builder be made to pay for it or is it down to me as I've fitted it this is one that I want to get put right correctly as not only is it a job with my reputation on she is a mum of a child at my daughters school and I see her a lot, I want to put right rather than make good

 

Ardex do a hardener that you put on a bit like a resin but if it really weak I reckon your best off digging it out. Not sure how you will tackle the builder. I was lucky as I had already told the builder I thought it would fail and he took the risk. After it all cracked I refused to stick the wood floor down and he ended up plying over the screed and tiling it instead

 

I thought you may say that, I only found out about it when I had this problem but didn't fancy taking the risk on it.

 

needs digging out and replacing mate, what a surprise a builder who can't make a decent screed.

 

Thanks matt the builder in question still owes me £4k for another job that he apparently hasn't got to give me at moment so if I can get anything over on him it will make me smile a little, I'm so happy I no longer do work for this bloke

 

christ £4000!!! i'd be around with the boys to get my money.

 

I would have to stand in line there's a very long que, but I brought his old house and he has a bit of land next to it where he keeps a lot of materials mini fuel tankers and small diggers very soon they will be missing and I'll sell him identical ones for £4 k

 

that would be rather funny when he turned up to get something