ABSTRACT
The Building Regulations relating to the construction of a roof of a residential building are: https://www.niso.org/standards/z39-96/ns/oasis-exchange/table"> A1 Loading B2 Internal fire spread (linings) B3 Internal fire spread (structure) B4 External fire spread C4 Resistance to weather and ground moisture F2 Condensation H3 Rainwater drainage L1 Conservation of fuel and power Reg 7 Materials and workmanship
