I didn't say that no vapor barrier was required.
In a 2x4 stucco and drywall const., the paper back of the drywall is the vapor barrier and is conceptually the same filament composition as the kraft facing of kraft faced insulation.
The stucco is composed of plaster sand mixed with red label cement and a little lime, which makes it water resistant, and is troweled into 1"/20 galv. stucco netting over 8ga. asphalt impregnated building paper and banjo wire nailed to the studs.
The building paper acts as a waterproofing and funnels any moisture that may find it's way through the stucco via cracks, to the ground or weepscreed.
The temperature of the dead air in the stud bay is affected by both interior and exterior influences and because there is no openings, there is no air exchange, therefore no dynamic moisture content swings.
In a 2x4 stucco and drywall const., the paper back of the drywall is the vapor barrier and is conceptually the same filament composition as the kraft facing of kraft faced insulation.
The stucco is composed of plaster sand mixed with red label cement and a little lime, which makes it water resistant, and is troweled into 1"/20 galv. stucco netting over 8ga. asphalt impregnated building paper and banjo wire nailed to the studs.
The building paper acts as a waterproofing and funnels any moisture that may find it's way through the stucco via cracks, to the ground or weepscreed.
The temperature of the dead air in the stud bay is affected by both interior and exterior influences and because there is no openings, there is no air exchange, therefore no dynamic moisture content swings.