That's why I have a lot of respect for Insulating Concrete Forms. You build it out of polystyrene insulation, then fill the voids between the two sides of the f

That's why I have a lot of respect for Insulating Concrete Forms. You build it out of polystyrene insulation, then fill the voids between the two sides of the form with high-compressive-strength concrete. No need to tear down the form, no need for an extra step insulating the thing after you've built it. That all said, it is somewhat more expensive than traditional construction. Better insulated, more energy efficient, and more resilient to fire and flood.