Asked on May 6, 2013
How best to insulate attic?
I am about to put on a new roof, and I am putting in a subfloor in the attic to use it for storage ( for now). I would like to insulate the attic, but am unsure of the "best" way to do so. One alternative is to "seal" the attic off using spray foam insulation, and the other alternative I am considering is to use a radiant barrier or reflective insulation. the radiant barrier (with a ridge vent) will be significantly cheaper, easier to install, and a lot less messy, but will it be as effective as using the spray foam insulation? Also, if I do seal off the attic with the spray foam, do I have to worry about problems with condensation from regular house air in a cold winter? Also, some time in the future I may want to finish all or part of the attic, and I would like for the insulation to be adequate so that I can reasonably heat and cool the space. I live in North Carolina, wher the summers are hot and humid and the winters do have occasional bursts of fairly cold weather. Any advice would be much appreciated.