Building Construction Handbook, Eighth Edition

(Nancy Kaufman) #1

Separate Screeds †


screed is laid onto the concrete
floor slab after it has cured.
The floor surface must be clean
and rough enough to ensure an
adequate bond unless the floor
surface is prepared by applying
a suitable bonding agent or by
brushing with a cement/water
grout of a thick cream like
consistency just before laying
the screed.


Unbonded Screeds †


screed is laid directly over a
damp-proof membrane or over
a damp-proof membrane and
insulation. A rigid form of floor
insulation is required where the
concrete floor slab is in
contact with the ground. Care
must be taken during this
operation to ensure that the
damp-proof membrane is not
damaged.


Floating Screeds †


a resilient quilt of 25 mm
thickness is laid with butt joints
and turned up at the edges
against the abutment walls, the
screed being laid directly over
the resilient quilt. The main
objective of this form of floor
screed is to improve the sound
insulation properties of the
floor.


*preferably wire mesh reinforced


Concrete Floor Screeds

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