Originally Posted by Windows on Wash
Radiant barrier provides zero insulation value.
Post up a picture and I will tell you how to do it but there is no reason that with some batting and rigid foam you can't get it done.
You could also just use batting with a air barrier over top (i.e. Tyvek) as well.
Took some pictures tonight.
1st picture is right side of the skylight shaft
2nd picture is front of the shaft with recess light
3rd picture is again right side.
I didnt took picture of left side, because is the same as right side. And back is tight space even for my hand.
My point is that framing is build from 2x4 and its not deep enough for batt insulation plus rigid on top.