You are reading a single comment by @Dooks-Fatberg and its replies.
Click here to read the full conversation.
-
The operative phrase was 'a cheap cementitious screed'.
Your builder is probably proposing to mix up on site a simple blend of sand(s?) and cement because that's all he knows.
Other materials are available.
We had a thick screed put down here, took about 4 months to be dry enough to lay flooring on, we worked to 1mm a day for the first 50mm then 2mm a day for 50mm plus, so working on this 80mm would take 110 days to dry. Depending on the screed used, some need to be sanding if you are sticking some flooring to it.