Anhydrite Screed Question - TilersForums.com

[Bill]

Feel for you!

As more liqud screed us used, your problem is becoming more frequent.
Maybe all tradesmen should reaserch before fitting to any surface and be sure they are using the correct methods.
But as usual.it's normally a case of, until it happens to you.

I think the onus should be down to the screed companies. They should supply a simple data sheet with every pour, to say drying times and ufh comisioning . Then info on processes before and during laying flooring.

I have said this for years - it should be the tile & adhesive manufactures priority to make sure everything fits together with new products. How many add ons do we get? a primer for this - a primer for that - c'mon guys, get it together for us poor tilers.

 

[J Sid]

I have come close to doing one of these floors beginning of last year, 300 m2 with ufh. Customer doing a fast build, did site visit the day before the screed was due to be done because he told me the it was being 'pumping in the liquid' tomorrow. On hearing this I got concerned. Turned out it was to be an anhydride screed, he wasn't told about drying times or procedures for finishing , one area was around the swimming pool which didn't sound right. I told him, he cancelled them and a couple of days later had three gangs of floor screeders with pumps on the job, done in a day. At about 70% of the cost.

 

[On one]

Feel for you!

As more liqud screed us used, your problem is becoming more frequent.
Maybe all tradesmen should reaserch before fitting to any surface and be sure they are using the correct methods.
But as usual.it's normally a case of, until it happens to you.

I think the onus should be down to the screed companies. They should supply a simple data sheet with every pour, to say drying times and ufh comisioning . Then info on processes before and during laying flooring.

I haven't come across an Anhydrite screed yet,but I wholeheartedly agree that customers and tilers need to be better informed by the screed companies.

 

[Just Rizzle]

expensive lesson on anhydrite screeds you wont be the last . another question why didn't you use a decoupling membrane?

 

[hmtiling]

The screed company who solely does gypsum screeds on the isle of wight gives terrible advice to all their customers. They say it doesn't need sanding or decoupling even with ufh and stone! This means i always have a nightmare trying to convince the customers otherwise. In fact I'm naming and shaming Mayhew Easyscreed for their p*** poor advice!

 

[Just Rizzle]

if the screed companies told the truth about drying time etc no one would put these floors down ive said be for we are going backwards not forwards

 

[On one]

Sorry for my naivety,but do you have to sand the floor if you want to lay other types of floor coverings?

 

[Just Rizzle]

only when applying adhesives that has to be stuck down I believe.
when we do vinyls such as amtico or karndean we sand then skim over with anhydrite leveller I never use cement based adhesives on anhydrite (calsiun sulphate ) based screeds.

 

[White Room]

Still have never seen one of those floor...

 

[Rich Midge]

Still have never seen one of those floor...

How is that possible?!