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The pros often outweigh the cons of using a concrete bathtub. Professional arguments include the material’s versatility, allowing for a wide range of bathtub shapes and sizes, as well as the durability and smooth, yet easy-grip surface of concrete. The disadvantages of concrete are that it has a high labor cost and can crack when exposed to temperature changes.
Versatility is the main argument for commissioning or creating a concrete bathtub. Concrete is a very moldable material, so it can be made into virtually any shape or size. A concrete vat can be cast in a factory and delivered to the location where it will be installed, or it can be cast in place, allowing for larger projects that would otherwise not fit through the doors to reach the installation site. Not only is the size infinitely adjustable, but so is the shape of the bathtub. Seats, ridges and any other additions can be included in the bathtub design.
Another argument for using a concrete bathtub is the material’s durability. It’s not very likely that a bathtub will be exposed to very long, but in this case, concrete is incredibly weatherproof. Concrete is also fireproof, so it’s a good material to use when building appliances or furniture. Fire and weather, though rarely, can destroy property, so it’s a good idea to use durable materials indoors to minimize devastation when natural or unnatural disasters occur.
One argument that also speaks to the durability of concrete is that it is very resistant to compression. This is a good feature when there is a greater risk of something collapsing on top of the concrete tub. Of course, no one expects their roof or a large tree to collapse on their bathtub, but concrete is one of the few materials that can withstand such high levels of compression. It takes a lot of force to crumble concrete.
Concrete is great for making bathtubs because of the smooth surface it creates when it dries properly. This is somewhat limited to the skill of the person molding and shaping the bathtub, but generally the concrete dries to an ideal surface for a bathtub. It’s smooth enough to be comfortable when the bather sits indoors, but it’s also rough enough to allow feet to grip the floor and prevent dangerous rain spills.
The main disadvantage of using a concrete bathtub is the high labor cost of the material. The material itself is relatively inexpensive, which is an argument in favor if one is planning to mold the bathtub themselves. Most people, however, prefer to leave this to a professional, and skilled craftsmanship in concrete often doesn’t come cheap. Mainly for this reason, there aren’t many concrete bathtubs.
Another argument against using a concrete tub is that the material tends to crack with changes in temperature. Cracks are only caused by extreme temperature changes, so they will not be affected by normal use. In certain extreme climates, this material is not recommended for use because it cannot withstand sudden drops and increases in temperature. The creation of the vat can be problematic because concrete has a tendency to crack as it cools and hardens.