Wall mounted barre brackets should be securely mounted to the wood studs of the wall or to a backer board. Hardware for mounting into wood comes provided with your wall brackets. If you have metal studs or a concrete wall, etc. you will need to purchase appropriate hardware from your local hardware or home improvement store. For this type of installation, we strongly recommend the use of a backer board which is securely attached to the wall or to every stud. Then the wall brackets may be mounted to the backer board at the desired spacing. Never mount a barre into just the drywall as it can easily pull out.
You should not attempt to mount wall brackets directly onto a mirror as it will surely crack the mirror. You may have the mirror cut out for the brackets to mount directly into the wall studs but this can get costly. We recommend a better method of attaching a backer board to the wall, securing it to the wall or to every stud, then mount the barre onto the backer board. Then you may install a mirror above and below this backer board. Another method is to install vertical mirrors leaving a small space between the mirrors to mount the brackets into the studs. When a barre cannot be mounted onto a wall due to mirrors or windows, a floor mounted barre is another option.