Nailbase Insulation advice (unvented hot roof assembly in IECC zone 4b or CA zone 2)

Hi, thank you for any advice.Roof assembly: Bottom to top-1/2″ Sheetrock (Low Sag)- 2″ air gap- 2×10 purlins @ 24″ OC running perpendicular to roof slope  w/ 7.25″ rockwool insulation… Hi, thank you for any advice.Roof assembly: Bottom to top-1/2″ Sheetrock (Low Sag)- 2″ air gap- 2×10 purlins @ 24″ OC running perpendicular to roof slope  w/ 7.25″ rockwool insulation…Read MoreGreenBuildingAdvisor