Pex and insulation in exterior wall

This may be a dumb question but can someone please explain to me the correct method .  I’m working in a 1980 garage wall in a Hot humid climate,  the… This may be a dumb question but can someone please explain to me the correct method .  I’m working in a 1980 garage wall in a Hot humid climate,  the…Read MoreGreenBuildingAdvisor