I gutted the room and now would like to rebuild. One side of the room slants (it's the roof) and the other side of the room is a dormer (all low ceilings).I want to insulate the ceiling but have no ridge vents so no moving air as someone mentioned I should have. I want to install foam channels to keep the insulation away from the roof but not sure if this is a good idea without the ridge vents. I will have a vent to the outside installed on the very top of the roof however and the small attic space is open all the way through the other two upstairs rooms and I will add another roof vent on that end of the house. I will only be able to install 3 inch insulation but that's better than none at all. I live in the northeast and was told if the job isn't done right I can get ice jams in winter. Also I don't see any way to drill ridge vents. would it be ok to just install the styrofoam channels and insulate then sheet rock or am I asking for trouble? Thanks in advance for any help.
Suggestion: install the insulation with the foam channels but leave the center section (roof ridge area) open from end to end. At each end you can install a static vent or an active one. Depending on the amount of space you have you may be able to install a power vent.If you can send me a diagram with measurements I can give you a more definitive answer.
