Fiberglass and steel doors are alternatives to wood doors for exterior entryways ... Both types of doors are available in pre-hung or slab form. Pre-hung doors are door slabs that are already ...

While the introduction of weather-resistant steel and fiberglass entry doors ... modest compared with other improvements. Entry doors typically come prehung in a frame and drilled for a knob ...

From there, though, they differ significantly. One key difference between fiberglass and steel doors lies in their outer shell. The exterior of a steel door is made of heavy-gauge galvanized steel ...