Air Bricks Are Used in Suspended Precast Concrete Ground Floors

question 4

Multiple Choice

Air bricks are used in suspended precast concrete ground floors because

• A) The equilibrium moisture content of the concrete exceeds 10%
• B) The floor screed contains lightweight aggregates
• C) The air beneath the floor contains moisture from the ground
• D) The air beneath the floor becomes stale
• E) The thermal insulation to the property contains asbestos fibres

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