Fiberglass tubs are the least expensive. They are light weight and easy to install, and the finish can be repaired. They are also thin; they flex and are not very durable. The finish is prone to fading, scratching and cracking. Fiberglass tubs are expected to last 10-15 years.

Acrylic tubs are perhaps a little better, though the finish can also fade or scratch. A better grade of acrylic tub will have a better finish, so check manufacturer's guarantees as well as prices. A wide variety of shapes and styles are available.

Porcelain enameled steel and porcelain enameled cast iron are the better materials for bath tubs. Cast iron tubs are expected to last 50 years. The enamel provides a durable finish, and both steel and cast iron provide a more stable base, especially for large or heavy people. A steel tub will be heavier than fiberglass or acrylic, but cast iron is the heaviest, and cast iron is likely to be the more expensive of these two.

Another option is solid surface. These are usually a mineral dust bound with a resin. The surface is repairable with a fine grit sandpaper. It is easy to clean, though one should avoid abrasive cleansers or any that contain an acid or ammonia. The majority of solid surface tubs come in free standing styes, but there are a few conventional tubs as well. They tend to be heavier and more expensive. You may have to special order a bath tub, though solid surface tub surrounds and showers are readily available. They are too new to have a reliable life expectancy.

The choice of manufacturer can make a product more expensive than it deserves. One product may be just as good, but not be able to command as high a price because the company is less well known. This is another area where one should consider the warranty and the price.