these should be fire resistant, smooth, durable, light coloured, coved at the join with the walls and must be easy to clean. Suspended ceilings are preferred as pipes and services are covered. There must be access for pest inspection and control.
internal walls should be of a solid construction so as not to allow harbour for pests. They should be smooth, durable, light-coloured, non-flaking, easy to clean and maintain, chemical and grease resistant and capable of withstanding heat and moisture.