Screeding advice please

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Hi all

Although I'm not at the screeding stage yet I am looking into it to be ready.

Firstly, I am getting underfloor heating (wet version) so this might make a difference to peoples opinions. Secondly, the room is going to be 40 square meters. Thirdly the screeding has to be 65mm deep. Fourthly, the screeding will be laid onto Celotex GA4075.

Like some other posts I have started on here when I haven't given all the information I hope this is enough information for you to make an informed opinion.

In no way shape or form am I willing to do the screeding myself. I fully understand that this has to be perfectly level and is one of the most important parts not to get wrong.

I have seen 2 different types of screeding. One in which a person puts down what I can only describe as a non liquid substance (I think it is cement and sand). Then he moves it about and levels it using a long piece of wood. The other is when a person has a pipe connected to a machine outside and then a liquid screed is pumped onto the floor and is left to set (apparently it takes a couple of millimeters per day to set).

So, here is the question..................

Can anyone tell me which is better? What are the advantages of both?

I have only had one quote so far for the liquid version and they want £1400+VAT. This includes everything from the product to the pump to the laser leveler (Apparently they use a laser level to make sure it is near as dammit perfectly level). I do like the idea of this system as I want it as level as possible but I'd like an opinion on both please.




Adrian
 
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What type of screed is the liquid version?

Gypsum based?
If so these screeds beat cement and sand hands down.

No shrinkage and better heat transfer are two advantages I can think off.

Seems expensive so get a few more quotes.
 
I'll be honest. I've no idea what is in the liquid. All I can tell you is that it is from the following website.

http://www.expressscreed.co.uk/ (I am NOT advertising this company whatsoever).

Maybe you can tell from the site without me having to phone them to ask.

My gut feeling was that £1400+VAT was expensive. After all, it is only 2.54 cubic metres.

I will ring round some other companies but maybe they know something I don't.
 
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They seem to be UFH installers who also lay screeds. Or maybe they are screed layers who also do a bit of plumbing!

They have a few big names in there. (Lafarge and CEMEX)
We buy concrete from CEMEX occasionally.
If someone else has installed your UFH system then they may be shafting you for the screed laying.

I'd stick with a specialist screed layer. Not jacko all trades.
 

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