$HTSC When you are using ICF construction, then your primary advantage is an increase in the structural strength of your reinforced concrete wall. You are using one simple operation to create all of the structural qualities of concrete with the insulation and air-sealing qualities of a SIPS wall when you do it correctly. Because half of the insulation of an ICF product has its insulation on each side of the thermal mass, a significant portion of the energy it receives goes to the ground through its footings.