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The average mirror has a lifespan of 10 to 15 years. After that, the coating begins to deteriorate, losing its reflective properties. Acrylic mirrors have a slightly shorter lifespan of seven to 10 years. Higher-quality acrylic sheets with UV-resistant properties have lifespans similar to those of your average mirror. By maintaining your mirrors and keeping them out of direct sunlight when not in use, you can extend their lifespan. Some mirrors can last for decades.

The size of your mirror depends on the size of your vanity and personal preference. Most people prefer a mirror that is 1 to 2 inches narrower than the width of their vanity, while others like a mirror that’s the same width as their vanity. Remember that the mirror should sit 5 to 10 inches above your faucet when choosing dimensions.

While wavy glass is sometimes called antique glass or restoration glass due to the fact that it's found exclusively in older homes, the proper names for wavy glass are actually crown glass and cylinder glass. Most commonly used for circular or portal windows, crown glass was created by manufacturers using a process of blowing and spinning. Meanwhile, cylinder glass was used more commonly because it created large square sheets that could be shaped to fit windows of all shapes and sizes.  

The cost to remove a mirrored wall from your home ranges between $100 and $3,300, though the average price is only $500. You can save money by doing it yourself, but make sure you have safety equipment such as goggles and gloves, as well as the proper tools (drywall knife, wire saw, and a plastic sheet or tarp to cover the floor).