In most cases, our Xtreme Cubes are shipped as water tight units. Most local municipalities will require a finished, slopped roof installed on site.  This is typically done by a local roofer who will place rigid tapered foam board on top of the cubes and apply a final rubber membrane such as EDPM or TPO as the final water barrier. With some projects, the roof can be installed in the factory and seams finished on site.