4.1  Moisture

The Contractor shall design the building envelope to prevent rainwater entry into the building structure and the internal accommodation.  Where water penetrates cladding elements, as part of the functional design and construction techniques, the Contractor shall ensure it is controlled and drained externally.

The Contractor shall ensure that all building elements and retaining structures shall incorporate appropriate means to resist the passage of dampness, both into the building structure and fabric, and into the accommodation, including the resistance to any hydrostatic pressure..

The Contractor shall ensure that the buildings are constructed and the design is detailed to limit air infiltration to minimum levels to reduce energy consumption and improve internal environmental conditions.