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| In the old days, 20 or 30 years ago, no recessed can was rated for being insulated at all. In fact I know of one house where the contractors didn't finish it before it burned because of insulation directly on the cans held in heat so well they ignited the wooden stringers added for the cans. And that took a house that had cost 5 times as much as budgeted to build. The "electrician"/"insulation contractor" saw the label, don't insulate over these lamps, and figured a wrap of fiberglass batts would protect the blown in cellulose from the heat. Might have, but the wood went first. I don't know if his business survived that loss.
Modern cans do tend to make a thin spot in the ceiling insulation and a chimney that's heated to move heat up. They ought to be surrounded and covered by at least as much as the ceiling everywhere else and to accomplish that will take extra insulation effort, like building a box to hold that thick and deep insulation. Soon one will be able to buy LED fixtures a quarter inch thick to do the same job as a recessed can and surface mount them while using a lot less energy for the same light intensity.
Gerald J. | |
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Lets talk insulation . . spray foams and blown types ~
