Reginald

Thanks for the input everyone. It took me about 20 minutes on a call to get the floor chap to share that he meant a non gypsum based screed. Regardless, the screed needs to be <80% moisture for him to lay the wood floor and as you’ve shared, I think even a non gypsum based sand and cement dries at about 1mm per day up to 50mm then 0.5mm. Our screed will be 75mm. does anyone know if you can add stuff to traditional sand and cement screeds to make them dry faster or are we looking at a poured screed for that? Some of the poured screeds promise dry in 28days or so… is that fully dry like <80% moisture? thanks in advance tagging @nod too - I hope you don’t mind - Thorfun mentioned you were a screed expert and I’m desperately trying to avoid more delays on our build!

This is a helpful read, thank you Ok it’s getting clearer!! Thank you all for helping me navigate this I wonder if anyone can advise if the image is anhydrous or not? My suspicion is that it is. Tried calling the manufacturer but keep getting passed around!

Hm I hope not as we’ll be charged more for that but that gives me something I can clarify with him. Thanks for replying are liquid screeds not anhydrous?@Thorfun

Hi everyone Our floor fitter suggests that we avoid anhydrous screed ahead of laying a herringbone floor as it apparently takes much longer to reach the required low moisture level to lay the floor. I’m struggling to find non-anhydrous cement to make up a sand & cement mix for the screed. We were looking at Lafarge General purpose + cement but that has clinker in which I believe is anhydrous. any tips please? (I also thought all cement was anhydrous so it’s a learning curve!) thank you