You have several choices when repairing a mirror. You can try the Gorilla glue and put it at several places to make it secure. If that does not work you may have to make a new frame to hold it in place.
Neither use adhesive
You should use a utility knife or a drywall saw to cut drywall.
Drywall screws should be placed about 12 inches apart when installing drywall.
To properly prepare drywall for tiling over it, you should first ensure the surface is clean and smooth. Repair any cracks or holes, sand down any rough areas, and apply a primer to help the tiles adhere better. It's also important to use the right type of adhesive and follow the manufacturer's instructions for installation.
Drywall anchors should be used when hanging heavy objects on drywall to provide additional support and prevent damage to the wall.
Look to see if there is a small set screw on back of the mirror assembly. Loosen screw and the button should slide out. Clean old adhesive off the window and button thoroughly (small flat razon blade works great). Apply the setup adhesive and allow 2 minutes to dry. Then apply liberal drop of adhesive to the button, and place button on the windshield. Allow 15 minutes to set up, and then reapply rear view mirror.
Drywall anchors should be placed no more than 16" apart. On a 20 foot wall you should place approximately 15 drywall anchors.
When installing drywall over plaster ceilings, it is important to first ensure that the plaster is in good condition and securely attached to the ceiling joists. Any loose or damaged plaster should be repaired before installing the drywall. It is also recommended to use screws instead of nails to attach the drywall to the ceiling joists for a more secure and long-lasting installation. Additionally, applying a layer of adhesive between the plaster and drywall can help improve the bond and reduce the risk of cracking or sagging over time.
Plastic sheeting works well for this, and yes it goes behind the drywall on exterior walls to help prevent moisture from getting to the drywall.
Yes, it should
Typically, two coats of primer should be applied on new drywall for best results.
You will be very careful when you deciding for the drywall color. You should not check the color when there is too much light shining on the wall. After that you can find color you want for your drywall repair.