Radiant barrier spray paint vs. open-cell foam
MAY 14, 2010
3:20 PM EDT
Open-cell foam vs. spray applied radiant heat barrier (paint)
by J. Ingols
We have a 50 yr. old home with some floored storage in attic and worn out fiberglass insulation in unfloored area, no HVAC there but some duct work. Am trying to improve comfort level on top floor and reduce energy costs. Have had estimates to have radiant barrier paint and additional blown insulation added and had an estimate to have open cell foam (Demilec) applied and encapsulate the attic. The question is not only which makes the most sense to do, but if we do use the open cell foam there is a question as to whether the best choice is to spray directly on the roof decking or to do it with a baffle system that essentially leaves a breathing space around the entire encapsulated space and supposedly keeps my roof happier. Oh yeah…..then there is the vapor question!! I am so confused. Any advice? Thank you.
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