The basement plumbing passed and the plumber returned to install the network of pipes on the insulation.  Once finished, the circulation of hot water inside the slab will make for a very warm and comfortable basement living area.  finishing the radiant heating system in the basement remains a costly endeavour.  It is a supplementary system to the forced air furnace, thus is totally optional to do.  Like many other materials that go into the job, cost has give up.   It will be interesting to compare the price of these systems with the one I did on my house in 2014.