We are in the process of setting up a final walk through of the domes with Monolithic and the General Contractor for next week. By that time the main dome will have all the first floor walls in place and the ceiling and subfloor for the second level as well. At that time we can get someone with an x-ray (or other non-destructive testing apparatus) to come in and test spots around the domes for compliance to thickness requirements. (What we will do it they don't make it is an entirely different question). Apparently there is no one local who does this, so we will be bringing in a person from Houston to do the testing.
They will be testing either 10, 15, or 20 locations depending on what we ask for (and how much we want to pay). We'll get a report back showing the full cross section of the area under the test location. It should show the outer membrane (the airform), the polyurethane foam, the shotcrete, and, if present at the location, the rebar.