BRE GG28/1 PDF

Describes ground floor construction in new buildings and in rehabilitation work where floors are being replaced. It is the first of five parts, the other parts explain how to assess different types of floor construction for replacement or repair, and how to repair them. This part describes the types of ground floors commonly used in domestic properties: ground supported concrete slab floors, suspended concrete floors (including beam and block) and suspended timber floors. It tells you how to construct each type and gives advice on the positions of damp-proof membranes (dpm) and thermal insulation. In particular, it gives details of: damp-proofing, vapour control layers, drying times for concrete bases and screeds, and positions for thermal insulation.