Proportions
| Cement | 1 part |
|---|---|
| Sharp sand | 3 parts |
| Typical strength | 3,625 psi · 25 MPa |
Screed
Screed mix ratio for a floor
A bonded floor screed is a rich 1 : 3 cement : sharp-sand mix laid 25–40 mm thick and bonded to the base slab.
Recommended mix
1 : 3cement : sharp sand
Bonded floor screed — about 3,625 psi (25 MPa).
Planning reference. Typical proportions and strength for general work, not a structural mix design. Load-bearing and structural work must follow your local building code and a qualified engineer's specification.
Why this mix
A rich 1:3 sand–cement screed used at 25–40 mm where it is bonded to the base slab. A semi-dry mix, compacted and trowelled level.
Once you know the mix, the volume calculators tell you how much of it to buy — cubic yards, cubic metres and the bag count in every size.
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