I m looking at building a 24x24 garage where the HO is going to put radiant heat in the floor. I m located in the NorthEast. Most of the garages (unheated) out here are framed 2x4 with houses 2x6. I m sure he will only use the radiant in the garage infrequently. What s your take? Is it worth upgrading to 2x6 and R-19 insulation, compared to R-13?