Can light insulation
This topic has been talked about a lot, but I notice a lot of the info dates back before LED’s became readily available/affordable.
I have about 30 can lights scattered through my house, and I want the best method of sealing them better. They are IC rated but not air-tight. They are mostly covered with blown-in insulation in the attic. Most of the fixtures are accessible from the attic, but some are are located very close to the outside perimeter, so they would be very difficult to get to from the attic (low clearance).
My main concerns are probably more for comfort, but any energy savings would obviously be a plus. My house is about 50 years old, and is drafty/uneven in the winter. In addition, I get a strong “attic smell” in the summer when it gets hot and the AC is running. So I have reason to believe these things are leaking considerably. I live in St. Louis, MO where the weather swings from 0F (or below) in the winter to 100F (or higher) in the summer.
My options are:
1. Keep using existing fixtures, cover with more insulation. Maybe caulk/seal around edges?
2. Replace with air-tight fixtures ($10 per can).
3. Add retrofit kits that fit into existing cans ($10-$15 per can). Do these offer adequate air sealing? I’ve already replaced my bulbs with LED so this seems a little wasteful.
4. Add covers over can lights in the attic (purchased at $15 per can)
5. Make my own covers using drywall boxes ($2-$3 per box. Cheaper but more work)
6. Some combination of above?
Where will I get my best bang for the buck? What is the best way to seal around the perimeter of the cans? Is there something like a foam gasket available and do they work well?
Thanks in advance for any help!
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