Cutting a concrete radiant slab

I'm adding a bath to the read of my shop space to create an ADU.

Unfortunately I needed to cut a utility trench through a slab that is only a few years old.

I do want to retain the radiant heat so I came up with a method to re-attach the cut loops.

The loops are 6" OC so it required a number of couplings, and some concrete sawing.

These 12" electric hand concrete saws work amazingly well. I used a gas powered walk behind sam for them long cuts. The hand saw was just as fast to cut, actually.

I used the wet saw to cut parallel to the loops first. Then a cut across the tube about 1-1-2" deep. The piece came out easily with a chisel. Luckily concrete doesn't stick to pex, so the tube was undamaged to reconnect. This provided just enough room to get a crimp tool around the tube.

I can slide some insulation below the tubes, some rebar to keep the pour stable.