How can I fix a poorly ventilated cathedral ceiling insulated with kraft-faced insulation?
I am in the planning stages of renovating a home that has cathedral ceilings with 2 x 8 rafters and R-19 kraft-faced insulation. Ventilation is poor at best. There is frost on the underside of the roof sheathing.
I would like to turn it into a hot roof by sealing up any vents and either replacing the the insulation with closed-cell foam or adding 2 two-inch layers of polyiso on top of the roof deck (leaving the existing insulation in place). If I choose the latter, will I be trapping moisture with the kraft facing?
Posted Tue, 01/22/2013 - 22:20
Edited Wed, 01/23/2013 - 15:56
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