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- 2x10 purlins @ 24" OC running perpendicular to roof slope w/ 7.25" rockwool insulation… Source: Green Building Advisor.