Welcome back, Yepod! Did you do a trip report?
Bernie, a wall blowout occurs when they pour concrete into the ICF too fast. A portion of the styrofoam blows out and concrete goes flowing onto the ground. If any of you have watched some of the dream house things on HGTV, they are making an entire house out of ICF on there right now. ICF looks like big styrofoam legos that have rebar inside. After they are filled with concrete, you have an insulated conrete wall with 2 inches of styro on each side. It makes a very warm and energy efficient wall. It also is much stronger than anything else, so is very good to put those heavy logs on.