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Whether it's better to repair or replace a broken mirror depends on its size, value, and the extent of the damage. For small, inexpensive mirrors, replacement is often the better choice, as the average repair cost of around $200 can be close to the price of a new one. However, for large mirrors—like those over a bathroom vanity or large floor mirrors—repair is usually more cost-effective. A new large mirror can cost hundreds or even thousands of dollars, while repairs typically range from $50 to $200. You should also consider the mirror's age and sentimental value. Antique mirrors and family heirlooms are often priceless and irreplaceable, making repair the most sensible or only option.

Bathroom mirrors weigh between 6 and 13 pounds, depending on the size. A 16x20-inch mirror weighs 6 pounds, while a 24x36-inch bathroom mirror weighs 12.5 pounds. Large mirrors, such as a 30x40-inch mirror, weigh 46 pounds. When installing or hanging a bathroom mirror, have a neighbor or partner assist you in lifting and holding the mirror in place. A second set of eyes can also help ensure the mirror is centered and level. 

Yes, it is possible to repair a damaged or cracked mirror, but whether you should do it yourself depends on the extent of the damage. For minor issues like small chips, cracks, and scratches, you can use a DIY approach. Resin-based repair kits can fix minor cracks, while scratches can often be removed with metal polish, nail polish, baking soda, or a glass polisher. Always follow the manufacturer’s instructions for the best results.

However, for more significant damage, DIY repair is not recommended. Repairing and resilvering mirrors is a delicate process that can involve caustic chemicals and requires a high level of precision. The materials for a DIY attempt can cost over $100, which may not be a significant saving compared to hiring a professional. Since a failed attempt could result in more damage and higher repair costs, it is often better to hire a mirror repair expert from the start, especially for large, valuable, or extensively damaged mirrors.

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.