insulating a overhang on a second floor

HI,

Rookie mistake, I posted this somewhere else and didn't know where so if you are reading this again I am sorry.

I was hoping someone here could help with a suggestion on how to deal with this issue.

About 4 feet of two of my second floor bedrooms overhangs our front patio. Both these rooms are freezing. I'm about to lay new hardwood and figured while I have the subfloor exposed I might as well lift up some of that plywood and insulate this section of the floor. Standing under those rooms on the patio I can see a vent on either side of the house. Not coming out of the side but straight down. I'm not sure why they are there or what purpose they serve or if they'll cause a proble once I insulate.

Can I insulate this floor from above and is there anything to take into account given these vents are there? I REALLY don't want to go in through the bottom/outside. The house is 25 years old...not sure why they didn't insulate them to begin with.

Any help or direction would be awesome!

I dont think I understand your vent configuration. A picture might help. I am surprised that area is not insulated. I am assuming you have 2x10 floor joists. If that is the case, the builder may have only put in R-13 because thats waht was goign in the walls as well. I would actually recommend blow-in insulation, that way it will pack in there really tight. After you insulate, you may want to put down a vapor barrier (6 mil plastic) to help keep out any additional cold air.

I hope this helps some.

The vents are to help prevent the buildup of unwanted moisture in the winter and heat in the summer. You should be able to purchase a foam baffle to surround the vent, and contain your insulation.