Why use vinyl flashing instead of aluminum flashing?
Vinyl flashing is resistant to the chemicals currently used in pressure treated lumber. Aluminum flashing will corrode when placed in contact with concrete and concrete products including fiber-cement siding. (Aluminum is not to be used with pressure treated wood. Pressure treated lumber contains high concentrations of copper like ACQ. This copper causes corrosion between dissimilar metals. When you use aluminum flashing with these chemicals you get product failure. When this happens you receive house and deck damage. Vinyl flashing can be used with pressure treated wood. It will not fail when used with pressure treated chemicals. Vinyl flashing will not dent like aluminum flashing will. Some examples of this are when someone steps on a piece of aluminum J Channel on the construction site or a roll of aluminum being dented in the back of a truck.
