Tips on Buying Mirrors With frameless mirrors its important to hang the mirror 6 inches above the faucet line. When buying mirrors especially for bathrooms, it is also important to look for mirrors that are made with silver. They provide a sharper reflection. Double coated silver mirrors (as this one is) have the most tolerance to humidity and will last significantly longer. This mirror is also made using high quality float glass. Have you ever seen a mirror where the reflection is just not right? It may be a bit blurry in the distance or warp your image, these mirrors are usually made using sheet glass. Float glass mirrors have a much cleaner finish which yields much less distortion.