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  Flow Screed Traditional Sand & Cement
Productivity Easily up to 2000m2 per day
Average 500-1000m2 per day
Only 100-150m2 per day
How quickly can you walk on the floor? Within 24-48 Hours
No curing needed
Should not be walked on for 7 days
Requires covering and curing
Joints 30-40 linear metres
Following building construction joints
Can be laid in small bays of between 5-7 linear metres
Performance Very low shrinkage
Minimal cracking
Will not curl
Shrinks
Cracks
Curls
Surface finish Easily achieves SR2 under BS 8204 Dependant on contractor Curls and cracks at joints
On Insulation No reinforcement required
40mm minimum thickness in commercial
 buildings
35mm minimum thickness in domestic buildings
D49 or fibre reinforcement
65 mm reinforcement
Average Drying Times 40 days at 40mm
Dependant on site conditions
Can be force dried after 7 days
9 Weeks at 65 mm thickness
Dependant on site conditions
Unbonded Floor Construction Polythene laid directly to substrate minimal preparation
No reinforcement
30mm minimum thickness
D49 or fibre reinforcement
50 mm reinforcement
Quality control Produced under BS EN 13454 Often mixed on site by hand with poor quality control
Labour intensive
Inconsistent quality
Installation Self compacting Requires thorough compaction, one of main reasons of failure