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Just purchased a 1972 vintage stick frame ranch in central Indiana. The attic has blown in insulation over batt(8" Total) then has a 4'wide x1"thick foil wrapped layer covering all open space in the attic sealed and taped. Same foil wrapped insulation has been stapled to the floor joist in the crawl space for 100% coverage. House seems warm enough and utility bills are reasonable. Is the foil layer going to cause moisture issues in the attic? How would I add additional insulation there, unfaced batts??

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Makes no since to me doing it that way.
The vapor barrier would be on the wrong side.
Got a picture?
Sounds like you may need more insulation.
Did they install baffles for free air flow from the soffits to the roof venting?
What type venting do you have?
 
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Soffets have good venting to roof vents. Basically the entire attic floor is covered eve to eve with the foil insulation layer over the top of the blown in and batts and is taped and sealed at the joint areas. Nice installation job, just not sure if it should have been done in place of blowing in more insulation. All ceiling air returns are also covered with the foil layer.
 
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