How to easily lay underfloor heating pipes in the spacing directly on the floor joists. The plan is to lay pine flooring on the spacing. At the outer edges, there are no problems with the turns, but further in where the interior walls will be, the underfloor heating pipes need to be turned so that each room gets its own loop. One idea is to fasten a 45X70 or 45X95 to the joist and splice the spacing where the interior wall will be. The problem is that not all interior walls will stand directly over a joist and the spacing is spliced on the same joist. Is that idea good or is there a simpler and better way?