Construction method of double-layer wall surface outer plate combined system in narrow and small space

The invention provides a construction method for a narrow-space double-layer wall surface outer plate combined system, and belongs to the technical field of building construction, and the construction method for the narrow-space double-layer wall surface outer plate combined system is used for designing a specific structure of the narrow-space double-layer wall surface outer plate combined system. The construction area of the narrow-space double-layer wall surface outer plate combined system is cleaned up; measuring and rechecking the sizes of door and window openings of the purlines; bottom foot flashing pieces installed on the narrow-space double-layer wall surface outer plate combined system are fixed through self-tapping screws; fixing a starting plate of the inner wall plate, and installing outer plate heat preservation cotton on the starting plate of the inner wall plate; a starting outer wallboard is fixed to the starting board of the inner wallboard; inner plate construction, heat preservation cotton