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buffalobillpatrick · 10-13-16, 10:36 AM

Upon checking prices for closed cell high density SPF, I decided to do what we did in my sons new house.
Flash & batt
Put only 4" of the closed cell high density SPF against under side of roof sheathing, this meets the requirement for a vapor barrier & then Johns Manville R-30 Rock wool batts.

10-13-16, 10:36 AM	#19
buffalobillpatrick Master EcoRenovator Join Date: Mar 2014 Location: Florissant, Colorado Posts: 599 Thanks: 814 Thanked 59 Times in 55 Posts	Upon checking prices for closed cell high density SPF, I decided to do what we did in my sons new house. Flash & batt Put only 4" of the closed cell high density SPF against under side of roof sheathing, this meets the requirement for a vapor barrier & then Johns Manville R-30 Rock wool batts.