No A Donnelly FlooringGeneral quotes I got back for screeds:
Standard Screed: £10 - £11 m2
Liquid Screed: £13.50 - £15 m2
With liquid screed prob need to make sure sub floors are level as you could get hit with extra cost - in part of one room - it ended up 80mm deep - so extra charge of £500 for additional material - I think it was £200 per cubic metre. It was 17 weeks before I was able to start tiling on it - got it tested at the deepest point.
Found tilers are cagey/cautious with liquid screed. Heard some horror stories of tiles lifting after 7/8 months.
The floors need sealed with an acrylic sealant rather than the standard ones. I used the pink Larsen stuff and have had no issues at all either on tiled floors or wooden floors stuck down with Gutoid (or equivalent adhesive).
Builders in general struggle with something that's different than what they know and rather than show their ignorance plough on regardless hence the horror stories.
I bought my liquid screed off RTU in Newtownabbey and they'd informed me of all this stuff at the time.
I got my screed from them as well though it was through a floor screed company. RTU said to put down 2 coats of acrylic primer first. Got it tested by them and the pass mark was below 0.5 and it was 0.4 so a pass but the guy still said it might be best left another week with the heat on.
Paul Hill perchance?