Readers ask: How to seal recessed can lights?

How do you make airtight recessed lights?

insulate and air seal recessed lights. After you’ve created your airtight, insulated box, place it over the offending recessed light in your attic and use a bunch more expanding foam to seal it up and make it completely airtight.

Should I caulk around recessed lights?

Merely caulking under the trim ring is ineffective, because the fixture housing itself contains numerous slots and other openings through which air can escape. To completely seal recessed fixtures from below, you would need to plug all of these voids.

How do you stop a recessed light from drafting?

To stop these drafts, you must install light caps over those recessed housings that do not allow you to cover them with insulation. You can also install recessed housing gaskets between the ceiling and the trims to further draft-proof both IC and non-IC (insulated ceiling or non-) recessed fixtures.

Can you put spray foam around can lights?

Spray foam insulation is an air seal and works a lot better than “regular” insulation does. Because the spray foam doesn’t allow the heat to escape it can make in contact recessed can lights get very hot. Most can lights have a thermal overload to protect them from getting too hot.

Can LED recessed lights be covered with insulation?

You could hire an electrician to replace each fixture with a sealed one rated for insulation contact (IC). Now it will be safe to heap insulation onto that spot. I do recommend that you replace your bulbs with LEDs because they’re so energy-efficient, but make sure they’re rated for use in fully enclosed fixtures.

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Are Canless recessed lights good?

The canless lights are more energy efficient, in that you do not have a big hole in your insulation. In Florida, so hot and humid.

How do you keep cold air from coming through recessed lights?

If your recessed fixtures are “IC” rated but they aren’t airtight, you can curb air circulation around and through them with loose-fill or batt insulation. Stuff the insulation into the gaps between the canister and ceiling and pile insulation on top of the fixture.

How can I insulate can lights without attic access?

Your best option is to caulk the can’s rim to the ceiling drywall and then replace the bulb with a drop-in LED replacement. These things are self-contained units that seal off the air leakage paths themselves, and you can caulk them to the housing too for extra assurance.

How do you tell if recessed lighting is IC rated?

If the can has slits or holes on it, it is not IC rated. Continue to look to see if there is an Underwriters Laboratory sticker. If there is, the letters “IC” will be in the number. Also, look for the letters “IC-AT” on the label model number so you know it is airtight sealed.

What does IC mean for recessed lighting?

Types of housing



In North America, UL 1598 recessed housings generally fall into one of four categories. IC or “insulation contact” rated new construction housings are attached to the ceiling supports before the ceiling surface is installed.

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Can you lay insulation over electrical wires in attic?

Don’t step on any cables or wires in the attic. Insulation in contact with the wires can cause it to overheat and start the black wire insulation on fire. You also need to be on the lookout for any older recessed lighting fixtures. Many of these can have wires that feed them that can catch on fire if they overheat.

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