R13 Insulation Unfaced. I've only had unfaced fg installed, so. Owens corning building materials r13 insulation unfaced batt 24 in. The energy efficiency requirements will not change the faced or unfaced issue.
Title 24 has other requirements.
Ecotouch™ unfaced insulation is designed to improve the thermal performance of wall and roof/ceiling assemblies. Is it worth pushing back on the builder to have the r13 swapped with i would have it changed to meet your contract. Dow products has lots of information on their site about different foam board. They include expanded polystyrene, extruded polystyrene, and polyisocyanurate unfaced or foil faced. One of your best investment dollars is spent on upgrading your insulation, but make sure you're using the right kind. When using a 2x4 for the walls how do you figure using a r19 insulation as they are 6.25 thick. The second floor is 2x4 framing and has r13. Place a new layer of unfaced batts perpendicular to the old layer, to cover any gaps in the lower layer.
