If you are using loose fill insulation use sheet metal or wire mesh to create barriers around the openings for such lights.
Attic insulation around light fixtures.
Loose fill or batt the common term for blanket insulation.
If there are recessed light fixtures in the ceiling below the attic be careful not to lay insulation on top of the fixtures.
These lights create a tremendous amount of heat which could ignite the insulation and set the house ablaze.
Alternatively you could use loosefill insulation instead of laying down batting.
Brands like atticat insulation can be blown in with the proper machinery and when they re applied this way the insulation doesn t settle ensuring consistent and long lasting insulation for years to come.
Once you ve decided which type is best for you examine the material options and prices to home in on the right product.
Never lay insulation over recessed light fixtures or soffit vents.
Up in the attic clean the ceiling surface around each fixture slit the cover to accommodate the electrical cable and place the cover over the fixture.
Insulating your attic can significantly decrease your heating and cooling costs.
Both can be added to uninsulated attics or layered over existing material.
However blown insulation can create a fire hazard if it comes in contact with electrical fixtures.
Now it will be safe to heap insulation onto that spot.
Ensure you use a foam sealant to seal and insulate around any attic windows.
Keep all insulation at least 3 inches away from recessed can lights unless they are rated ic insulated ceiling.
How to install insulation next to ic light fixtures.
Fire rated recessed light cover that simply unfolds into a perfect cap over non ic rated attic light fixtures requiring a 3 gap between fixture and insulation.
Apply the sealant around the cable and along the edge of the cover where it rests on the ceiling.
Keep all insulation at least three inches away from recessed light fixtures.
For diy attic insulation you ve got two choices.
As another approach for insulating around the fixture i have worked with an insulation contractor who sprays foam over a dome shaped mold.
If you have recessed lighting in your ceiling it can get in the way when you want to insulate the attic because the canisters might get hot.
Again this approach only works when you have an accessible attic space.