A building system including a plurality of supports structured to be vertically
disposed in an underlying surface in spaced apart relation from one another, and
a plurality of support headers removably disposed on an exposed end of each of
the supports. Each support header includes a mounting hub that removably engages
the exposed end of the support, and a plurality of engagement elements. A span
element is further provided and extends between adjacent supports, each span element
including a lock element that matingly engages a corresponding engagement element
at the supports so as to removably secure the span element in position. A re-enforcement
panel formed of a stiff, open grid configuration is suspended from the span element
along with an application panels. The application panel includes a plurality of
apertures defined therein to define an open mesh, and a quantity of un-hardened
concrete is applied to the application panel in order to substantially cover the
application panel, the re-enforcement panel and the supports, thereby defining
a wall upon hardening.