What Do I Do If I Have Blown-in Insulation?
Yes, you can.
You can use window screen mesh or use a piece of batting style insulation as a way to hold the insulation back without inhibiting the proper air flow.
Batt insulation is the preferred method of insulating above ceiling speakers. It holds back the blown in insulation when you cut the installation hole.
If you already have blown in insulation and doing a cut without batting above, take a piece of batt insulation up the ladder with you and with your last cut of the hole, push that batt, along with the piece of cut drywall up into the attic space and leave it there in place holding back the blown in insulation.
Should the insulation be removed from the area in the wall where the speaker mounts?
Using Regular R19 paper backed fiberglass insulation, we’ve removed the Kraft (paper) backing (sometimes plastic) just around the speaker’s rear components and found that’s all that’s needed to allow the speaker to “breathe” properly. The fiberglass itself has a burning point at over 1000 degrees fahrenheit. Cellulose has raw materials and paper content and may burn closer to 300 degrees Fahrenheit. The speakers may heat a little higher than ambient temperatures but shouldn’t be a cause for alarm.
Any concern with the speaker contacting the insulation?
Best practices would be to keep paper, cellulose and other organic matter away, but fiberglass shouldn’t be a problem.