One disadvantage of unbonded screeds is
A) They can only incorporate lightweight aggregates
B) They cannot incorporate lightweight aggregates
C) They are thicker than bonded screeds
D) They require a higher water content than bonded screeds
E) They require a higher cement content than bonded screeds

Question

Quizplus · Accepted Answer

Unbonded screeds are not directly adhered to the base but are laid on a layer of insulation or damp proof membrane, which often necessitates a thicker application compared to bonded screeds that are directly applied to the substrate. This thickness is required to ensure structural integrity and adequate performance since the screed is not reinforced by adhesion to the substrate.

One Disadvantage of Unbonded Screeds Is