Flat roof with 2×10 rafters: Can I use dense-packed cellulose and close the vents?
I have a flat roof constructed with 2x10s, there are no overhangs but there are round vents if the fascia. I live in zone 5. the ceiling currently is sheet rocked with R-22 kraft aced Fiberglass. The insulating contractor suggested that drilling holes and adding dense pack cellulose would be the best method.I would have to close up the vents at the fascia. would this work? should the dense pack be on top of the fiberglass or below? The GWB is attached directly to the rafters and are pitched about 1-1/2″ in 12′. there is a 5ply hot tar roof above that looks to be in good shape that was installed in 1999. there are a couple of hi-hats in the ceiling that I will remove and use a surface mounted LED or track light in there place. What are my options? can this become an unvented roof without using Closed Cell foam? Any help would be appreciated.
Thanks in advance
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