Monday they finished back-filling and prepping the inside of foundation for the slab. 4 inches of gravel were brought in to go under the slab.
Tuesday our plumbers started the rough plumbing. They put in all the sewer and water lines that need to go under the slab.
Wednesday all the work the plumbers did on Tuesday was inspected and then the interior footings were dug, the plastic vapor barrier was put down and a wire mesh was put down. The vapor barrier is to hopefully keep any ground water from making its way from underneath into our slab. It also serves to reflect the heat generated from the radiant tubing up into the slab and not down into the earth. The wire mesh should help keep any cracks in the slab from spreading too much.
Thursday the plumbers started working on the radiant tubing for the first floor. The tubing was laid out in rows one foot apart. A loop was put outside the front door so that we can tie into it later and keep the porch heated and ice-free. We are really excited about the radiant heat. This was all inspected Thursday afternoon and ready for the pour on Friday.
On Friday the concrete crew for the flat work was there early to get ready for the pour at 9:00 a.m. First they snapped a level line for the top of the slab then put rebar dowels into the foundation walls to keep the slab from slipping in the event of settling. We did a lot of compacting and hope that settling won't be an issue. We couldn't really afford a pump truck for this pour, but fortunately there was room for the concrete truck along the south side of the house. We had a really good crew on the flat work and they worked quickly and efficiently to rake out and level out the concrete. As soon as we started to pour the wind really kicked up causing the concrete to set up a little faster than we would have liked, but with the power trowel, we were able to get a really smooth surface.
Saturday the slab guy came back to score the slab. Concrete slabs like ours have a tendency to crack. It's a pretty big area for a single slab and it is inside the foundation without anywhere to expand. This makes it pretty unpredictable and cracking is pretty much inevitable. By scoring the slab we hope to create a place for the slab to crack where it will be contained and unnoticeable. Like I said though, concrete is unpredictable and we had a few cracks overnight. One of them was pretty big right through the center of the house. I'm sure we grow to love our cracks here and there, and hope that we won't have many more.