Footings required only at corners and where panels connect. Requires continuous footing and masons to lay block foundation wall. Requires continuous footing and lug footing to support panel weight.
Insulation is cast into the panel.
Insulation needs to be added after walls are in place and exterior sheeting has been completed. Insulation usually needs to be added, requiring the addition of furring strips. Electrical conduit and boxes are cast into the panel, greatly reducing wiring labor. All electrical components must be added. Electrical conduit and boxes are usually added after walls are erected.