Technical Booklet C Site Preparation and Resistance to Contaminants and Moisture·Page 25·5.14
Suspended concrete ground floors - moisture resistance requirement
Suspended concrete ground floors must resist moisture passage from the ground if they adequately resist moisture to the upper surface and protect reinforcement from moisture.
Any suspended floor of precast or in situ concrete, including beam and block floors, next to the ground should meet the requirement to resist the passage of moisture from the ground if it will adequately resist the passage of moisture to the upper surface and if the reinforcement is protected against moisture.
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