Batt Insulation Attic Roof with Air Gaps between planks

Hi all,We’re looking to do some efficiently upgrades on our home (Climate Zone 3B Los Angeles) including better attic insulation, a new HVAC system and a new roof (metal).Our ducting… Hi all,We’re looking to do some efficiently upgrades on our home (Climate Zone 3B Los Angeles) including better attic insulation, a new HVAC system and a new roof (metal).Our ducting…Read MoreGreenBuildingAdvisor