Fascinating!

Help me understand what I'm seeing though....what supports that decking? It looked like it was all open, and then they just placed foam panels down and poured the concrete on top...are those foam panels structural? What supports the weight underneath the concrete?

looks great! Our ICF home will hopefully get started in September.

Annie- the concrete, once cured, is structural. The foam is only the forming method. The shape of the foam panels creates ribs (concrete beams) that are reinforced. Once poured, the top slab and beams are continuous, creating a very strong and nearly sound proof floor.

Great videos. Make sure you put the ICF in the title and description so people who are looking for it will find it on youtube.

@Annie: lzerarc is right; I'll give a little more detail here. The Insuldeck panels (decking) you saw installed are not just foam - they have integrated "beams" of steel. They aren't very significant, and the gauge of steel is nothing to write home about, but it's enough to support a person walking atop about a 10-15' span; any more and you'd want bracing below. And, in fact, for the pour, all of the partition walls and then simple 2x6 Ls are used to brace every 6-8 feet along the spans. For this house there were maybe 6 Ls in addition to the partition walls; they only take a couple of minutes to knock together and a couple of minutes to mount up. Then, wire-mesh is placed over the radiant tubing, which contributes to rigidity, and rebar is placed at all edges, angling into the wall. All spacings, rebar sizes, etc. are engineered. Finally, where beams are needed, they're built out of rebar (tied together with rebar ties). Once the concrete is poured, all of that metal within gives the concrete its strength.

@gaonmymind: thanks; I'll go change those video names soon.

I see...very impressive!