Hi I'm in the process of remodeling an older home. The insulation in the loft was removed, there was batting and blown, now it's time to re-insulate the loft. I live in Arkansas winter temps sometimes 30 degrees, do I need the batting and blown in my loft?
The type is pretty much immaterial; you need insulation of R30 at a minimum
If there's access/storage and/or you're thinking of doing it yourself, the batting is probably much simpler to deal with as well as less muss. If it'll be put up there and nobody is there for the next 20 yr or so, getting it blown is possibly a little cheaper presuming decent access.
closed cell expanding spray foam seals air leaks better and has a higher R value per inch. however it costs more. but its a one time cost energy costs forever.
Depends on the sprayed area. If spraying the roof deck, open cell is considered better due to the ability to allow water to pass "IF" there is a roof leak. Open foam will allow the leak area to be detected much easier. Once dry, open cell returns to it's normal state. If not on the roof deck, then closed cell could still be considered, but in general, closed cell is generally used for grade level or below because it serves as a complete sealant barrier.
Closed cell used on roof decks will reroute a leak, thus making it difficult to pinpoint the entering area. It also has a higher expansion ratio and is recommended to be sprayed in new construction since it can push out existing walls if not sprayed properly.
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