The aim of this guide is to encourage all stakeholders in construction to consider firestopping design earlier in the process in order to avoid problems at a later stage in construction. It is not an installation manual but guidance to a good practice approach. The guide is broken down to provide information on actions that should be carried out during each of the stages one to seven as defined in the RIBA Plan of Work. The guide was produced collaboratively by BSRIA, the Association for Specialist Fire Protection (ASFP), Building Engineering Services Association (BESA), Finishes and Interiors Sector (FIS) and the Gypsum Products Development Association (GPDA) to address service penetrations in buildings and ensure the spread of fire due to inappropriate or poorly installed service penetrations can be eliminated.