Parallel to the lines you ve drawn but about 1 inch 2 5 cm inside stick 4 pieces of painter s tape to the wall.
Hang shelves mirror wall.
If the home improvement project is a complete redesigning of the bathroom and the mirror is not on the wall then that reduces some of the work.
If the mirror was already attached to the wall it should be removed so that the glass shelf may easily be attached.
Attaching a glass shelf to a mirror is no different.
The best choice is to do what the pros do.
Set the mirror down.
Choose a picture hanger based on the weight of the picture or mirror.
Mark where you want the mirror to hang using a pencil.
Hang using picture wire hold the mirror against the wall at the desired position.
Secure medium weight items such as mirrors artwork and shelves weighing between 20 and 40 pounds with plastic ribbed anchors that spread out behind the wall after inserting the screw.
Mark the location of the top edge and the center of the frame.
You can buy special plastic anchors for hanging heavy mirrors and pictures but you ll be left with a sizable hole to repair if you decide to relocate the object.