Insulating around recessed lights


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Old 01-25-11, 07:05 AM
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Insulating around recessed lights

Making real progress on kithcen ceiling, 3/4" beadboard planks directly on the joists. Insulation above that is paper-faced R38. I have quite a few recessed light fixtures (the "contact OK" variety) as well as two round A/C ducts and a box for a ceiling fan. I'm trimming each plank rather close, <1/4" where I can, on radii to keep close to the lights, etc., but I think I might best seal that up. What's best/safest? Caulk? Stuff in loose fiberglass? Spray foam insulation?
 
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Old 01-25-11, 10:04 AM
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Because you're only trying to minimize air infiltration around the fixtures, I would go with the fiberglass. It's more easily removed than caulk or spray foam should you ever want/need to replace the fixture.
 
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Old 01-27-11, 06:44 AM
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Thanks, that makes sense and as I'll certainly have scraps of fiberglass insulation lying around during this remodel, this is effectively free.

I was to a degree worrying about insulationg the wooden ceiling from heat (combustion), but in retrospect makes somewhat less sense; with only 42W compact Fluourescents in the "cans", just not much heat generated.
 
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Old 01-27-11, 09:00 AM
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One note about the CFLs you want to use....
Some of them will recommend not installing base up as the heat will degrade the electronics in the base. Should say on the package....

Hmmm...not sure if you meant the plug-in types or screw-in types, dunno if it applies to the former.
 
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Old 01-28-11, 06:27 AM
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The CFL's are Home Depot's house brand, 42w (150W equiv), no mention of a contraindication on inverted use on the packaging. However, had an odd burnt smell at first, then two burnt out. I replaced them and no troubles or smells since. I might swap out for "branded" CFL's later.
 
 

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