Abstract: A fiberglass, insulated bulkhead door assembly overcomes the limitations of conventional wooden and metallic storm doors. A preassembled bulkhead door assembly is positioned atop a preexisting concrete foundation. Once in place, the bulkhead forms a liquid tight barrier. As an insulated, lockable structure, the bulkhead door assembly provides a means of ingress into and egress out of a basement of a dwelling structure. The base support and door of the bulkhead door assembly incorporate an insulative layer sandwiched between a pair of molded fiberglass panels, which are then covered by a durable gel coat finish. The combination of insulation and fiberglass maintains an effective thermal barrier between the basement of the dwelling structure and an exterior environment. A pair of pneumatic struts counterbalance the door into an upright position.