For best results make sure the wall or door is completely flat and has no imperfections. If this isn’t possible or you are unsure we suggest the acrylic mirror is first mounted onto a thick MDF sheet.  Only use specialist Acrylic Mirror adhesive or mechanically fix your mirror using screws.  If you fix with screws, please leave some room in the hole for the acrylic mirror to expand and contract. This can be done by making the hole size slightly bigger than the screw.