What is an expansion joint and the proper spacing for it in stucco applications?
A.-An expansion joint is an assembly designed to safely absorb the contraction and vibration of Portland cement plaster (stucco). The proper use of expansion in stucco systems will depend on a number of variables, including: the type of construction materials to which the stucco will be applied; the orientation of the construction vertical (walls) or horizontal (ceilings); and whether the surface is curved or angular.
