Flat roofs and balconies

7.1.2Provision of information

Designs and specifications shall be produced in a clearly understandable format, include all relevant information and be distributed to all appropriate personnel.

Design and specification information should be issued to site supervisors, relevant specialist subcontractors and suppliers, and include the following information:

  • Extent and direction of falls, and position of rainwater outlets.
  • Sections through the construction, indicating how falls are formed and ventilation is provided.
  • Size, specification and position of the components, including treatments for durability and the position of the vapour control layer, insulation and waterproofing layers.
  • Details at critical junctions.
  • Details of fixings and fixing methods, including those for insulation and surfacing.
  • Specification for intensive, or extensive green roofs.
  • Details and fixing methods of balcony support and guarding components.