Insulation, Radiant and Vapor Barriers - Louise "Insulation question"

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Repairs
05-12-08, 03:47 PM
We have a slanted roof over an enclosed porch (3 season with sliding glass on 3 sides). It is attached to the back of the house with no air vents other than soffits at the bottom of the slant. The studs are 19" on center going from top to bottom. We need to put some insullation on the roof side and finish it over with soffit for a ceiling. What type of insullation can I use. Must I have anyother vents other than the those at the bottom of the roof on the outside of the enclosure and do I have to worry about mold (and how do I prevent it).

resercon
05-22-08, 06:23 AM
Install Styrofoam baffles to the underside of the roof decking, then install the insulation. While it is ideal to have vents at the higher portion of the roof, in this case it is not practical to install them.