We managed to construct the foundation for our office expansion in spite of some heavy rains. We installed the footings last Friday which kept us up out of the wet soils as we erected the forms and placed concrete for the foundation walls on Monday. The walls are 8″ thick reinforced concrete, with a ledge to accept the floor on the inside. The aluminum forms are light to put in place and create a fine, smooth wall surface. After the concrete set we removed the forms and applied rigid insulation to both the interior and exterior surfaces of the foundation wall. This extra amount of insulation pays off greatly in guarding against heat loss and helps keep the floors warm as well. To protect the insulation we cover it with a reinforced fiberglass material that is gray. Once the grade is brought up it looks great and keeps the insulation secure and tight.