How much screed do I need?

A damp screed weighs 100 kg per m² at 5 cm thickness, including compaction.

When buying 'dry' screed from a screed silo (consisting of 1 compartment dry cement and 1 compartment sand) you will notice that it weighs less because it has not yet been mixed with water. With a screed from a screed silo you only pay for the cement and sand, but not for the water added by you.