Locate the stud closest to each side of the window where you’ll be mounting the blinds. Mark each stud with a pencil for reference.
Measure the width between the two studs and obtain a blind that spans this distance.
Mark the location where you’ll install the mounting brackets along the studs. Place them at a level even with or slightly above the window to ensure coverage. Hold the blind brackets up to the location and put a pencil mark through each screw hole.
Hold a nail set up to the pencil marks and tap gently with a hammer to score the tile surface, which helps to prevent cracking during the drilling process. A nail set is a tool that resembles a tiny ice pick.
Drill a hole through each pencil mark, placing the tip of your tile drill bit directly into the indentation from the nail set, going deep enough to hit the stud beneath.
Line the brackets up with the holes and screw them directly in place. Mount the blinds between the brackets to finish the installation process.