What are ICFs?
ICFs are hollow “blocks” or “panels” made of plastic foam that construction crews stack into the shape of the walls of a building.
The workers then fill the center with reinforced concrete to create the structure. There are over 25+ brands of ICF blocks in North America, each with some variations in design and materials.
ICF construction sandwiches a heavy, high-strength material (reinforced concrete) between two layers of a light, high-insulation one (foam).
This combination creates a wall with an unusually good combination of desirable properties: air tight-ness, strength, sound attenuation, insulation, and mass.
This gives an ICF home some sizable advantages over an ordinary stick-built home.
Greater energy efficiency. More peace & quiet. More day-to-day comfort.