When you go into your attic during the day, should you see light or should it be completely dark? Also how much light should you see out of your roof vents? How many roof vents should you have for a 1575 square foot home?
Thanks
Leah

cyberheater

We usually do not put exhaust out to an eave/soffit area. Reason for this is your point - condensation freezes and as the warm air from your exhaust
hits cold air, it can create a problem in that eave area with your materials. From this pic, those exhaust fans should go thru your roof, not out the soffit area of your roof.

I cannot tell how large your home is, so I cannot tell you how much ventilation you should have, but having enough baffles in that area properly installed to allow enough air will be the best thing to do. If you then want to leave, after installing more, some areas covered with insulation at the soffit after that, then you should be okay. The issue here is really about having enough areas of paths for that air. Also, that insulation looks a bit "squeezed" in there. If you use any insulation, it cannot be compacted for it to be effective.

Vapor barriers can be plastic laid inbetween the joists of your ceiling/drywall area. We usually use 6 mil plastic, but that may be overdoing it for you(we just buy the same thickness for multiple projects). This should be done before you put your insualtion in, but I have seen here in the MIdwest, where this was not followed even in new homes. Makes it tuff to redo after insulation is blow in.
Your location's code dictates how it should be installed and what material to use (what thickness, etc) When putting plastic sheets in, I run them tight up the sides then secure them on the top of the joists and do the next joist. I have also seen them cut and laid just within the joist cavity (older homes).

We get below freezing temps here in the winter and high heat, humid summers, so everything we do is "extra duty" here.

Leah4

Is it code to use a vapor barrier in the attic under blown in cellulose insulation? We live in Nebraska. I have r 39 value of insulation in the attic with batt insulation rolled and stuffed on the north side. We have cut down some drywall in the bathroom where it froze in the winter and we could feel air coming in. There is minimal insulation above the drywall with the rolled over it. Should the area between the drywall and framing be sealed with spray foam or caulking?

microllins

Basicly, you need an equal amount of ridge vent as you have soffit/gable intake area.
the propa vent/baffles need to be installed so that they are not crushed.
Once they are allowing the proper intake air flow, I think you need to reposition the exhaust tubes. If not, you will be drawing the exhausted moisture from the bathroom back up into the attic. once it gets cold it will freeze on an attic surface. Once it melts, it can get the ceiling wet or run down into the walls.