Anyway know if it is permitted to have an internal door in a house with
a height of 6 feet (1.8 metres)? A friend wants to fit a mezzanine in a
flat, and to do so would need to reduce one of the internal doors from
78 inches to 72 inches.
I've tried doing a search of Building Regs,but can't find anything
definitive, so any help would be appreciated.