|
Ryland,
I think that reflectix would be a good bet, since it will reflect the radiant heat back into the room. Just check that the max temp of the radiant lines won't melt the plastic on the reflectix. If you put plywood across the joists, then you can dense pack the cavities with cellulose, but I would be really careful to make sure that the radiant lines are completely separated from the cavities of cellulose. When you dense pack cavities with cellulose, the little particles find their way through every little hole and fill nearly every possible cavity they can get to. You wouldnt want any insulation near the radiant lines. Because of this it might make more sense to do fiberglass(as much as I hate it) or foam board or thermax (check your local codes), and foam around the edges of the board to airseal it. Is the space below within the thermal boundary or out?
What happened to your vx?
-James
|