Well, its been awhile, and there's been some more progress. The final grading and packing down of the sand/gravel material was done, then the R11 insulation was laid down on top of that. After that, there were plumbers here, who installed the PEX piping on top of the insulation, and connected the piping to a manifold assembly. There are 6 "zones" for the piping in the floor, which are separate "circuits" in the piping, in which the flow of the coolant that will be heating the concrete floor pad can be controlled. The flow can be increased to areas where the floor is cooler, and decreased in areas where the floor is warmer. The plumbers explained to me that in a building the size of the one I have, I probably won't notice much, if any, areas of great temperature difference, and I should be able to run all 6 zones with the same flow of coolant. We had marked out the area where the hoist will be installed, and no piping was installed in that area, so as not to run the risk of accidentally drilling into any of the piping when the hoist installation is done. On May 29, the concrete floor was poured. There was a crew here, of about 5-6 guys, not counting the cement truck operators. Since the chute on the cement truck wouldn't reach to the rear of the building, the crew was taking cement to that area in wheelbarrows. The concrete was 5"-6" thick after it was spread out and levelled. It only took a couple of hours to pour the concrete and level it out, but the guys were here most of the day. They used one of those big circular gas powered concrete "polishers", to go over the whole building, to make sure that the floor is flat and smooth. They returned the following day, to make relief cuts in the floor, to allow for expansion and contraction, then applied sealer to the concrete surface.
The interior walls have been insulated (done before the floor was poured). They measured the interior walls for the steel siding that will be installed on them. The siding arrived this past week.
My builder left for a 2 week vacation in Italy on May 29. He should be back in Canada now, so I'm thinking that things should be starting up on the shop build again this week. I think we're on the downhill side of the build now. I'm hoping to be moved in there sometime in late July, possibly early August.