Replacing can lights is not hard. There is a junction box on them which you can pop off one of the side walls easily and have access (at least for halo ones). Go to the store and look at one, you'll see it's not much different than any other light. they have sliding bars that you nail to the joists (nails included). Just make sure you get an IC can which can come in to contact with insulation.
Not sure if it's worth pulling all the insulation out. Is your bedroom the room which doesn't have insulation (or less) over it? Some of the pictures makes it look like the pink fiberglass is laid out over the joists with little insulation below it. I would make sure theres insulation beneath it. It also appears you have insulation run all the way to the soffet and you do not want that. Make sure you have soffet vents and room for the air to flow. Of course i don't subscribe to the completely seal the attic theory. You'd expect to see the upstairs hotter as heat does rise, but you will notice a improvement when your attic is properly insulated. I have two out of three rooms with insulation properly done over them and one with nothing (going to be replacing the sealing soon). You can definitely feel a big difference when you walk through the doorway. I'm in south carolina with a tin roof so my attic gets considerably hot. I put up a radiant barrier stappled to the roof joists and then installed a gable vent. The manufacturer recommends setting its thermostat to come on at 105 degrees, but it never comes on unless i set it down in the 90s. Other than that, i have R-30 fiberglass placed between the joists. I removed everything that was up there when i moved in, but of course the pictures below are what I started with.
Not sure if it's worth pulling all the insulation out. Is your bedroom the room which doesn't have insulation (or less) over it? Some of the pictures makes it look like the pink fiberglass is laid out over the joists with little insulation below it. I would make sure theres insulation beneath it. It also appears you have insulation run all the way to the soffet and you do not want that. Make sure you have soffet vents and room for the air to flow. Of course i don't subscribe to the completely seal the attic theory. You'd expect to see the upstairs hotter as heat does rise, but you will notice a improvement when your attic is properly insulated. I have two out of three rooms with insulation properly done over them and one with nothing (going to be replacing the sealing soon). You can definitely feel a big difference when you walk through the doorway. I'm in south carolina with a tin roof so my attic gets considerably hot. I put up a radiant barrier stappled to the roof joists and then installed a gable vent. The manufacturer recommends setting its thermostat to come on at 105 degrees, but it never comes on unless i set it down in the 90s. Other than that, i have R-30 fiberglass placed between the joists. I removed everything that was up there when i moved in, but of course the pictures below are what I started with.
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