Acrylic tubs and cast-iron tubs are some of the most popular materials for homeowners to update the look and style of their bathroom. This is because both materials have a wide range of benefits that make them an excellent choice for a bathroom update. However, there are also some key differences between the two materials that homeowners should be aware of before making a final decision. Below, we will discuss some of the key differences as well as the similarities between these two popular materials so that homeowners can make the best decision for their bath or shower update.
How are Acrylic Tubs Made?
Acrylic tubs are made by combining different plastics using a curing process to harden the material and comes out into a sheet. It is then heated and then vacuumed into the desired shape. Acrylic tubs are then reinforced by fiberglass. This results in a material that is much stronger and more durable than traditional plastics. In addition, the material is also much lighter than other types of tub materials, making it easier to install and move around.
How are Cast Iron Tubs Made?
Cast iron tubs are made by pouring molten iron ore into a mold. This results in an extraordinarily strong and durable material that is also very heavy. Because of this, cast iron tubs are often considered to be more of a permanent fixture in a bathroom than acrylic tubs. In addition, cast iron tubs can be difficult to move and install. This is because they are so heavy. Cast iron tubs often require multiple people to move and to install them. This often makes cast iron tubes expensive not just for the material but also the labor for installation.
The Comparison: Acrylic Bathtub vs Cast Iron
When it comes to choosing between an acrylic tub and a cast iron tub, the choice can be difficult. Both materials have their advantages and disadvantages, and homeowners should consider all the options before making your final decision. Both acrylic and cast-iron tubs offer a wonderful choice for a bathroom update. However, the key difference between these two materials is the weight, installation, cost of labor and materials, durability, maintenance, and heat retention. See below for a breakdown of these characteristics to help you choose the best tub for your bathroom.
Durability & Appearance
Cast iron tubs are known for their durability and strength. With the proper maintenance and care, these tubs can last for decades. The base of a cast iron tub is made of metal, so it is exceptionally resistant to cracking and denting. Since cast iron tubs are poured into a mold, this can severely limit the designs available. Cast-iron tubs are usually found as free standing tub, garden tub or claw foot tubs. If you were looking for a tub and shower combination, this type of material may not be the best choice for you.
On the other hand, acrylic is amazingly flexible and can be molded into just about any shape or color. This allows the homeowner to find the perfect tub to match their bathroom décor. Unfortunately, acrylic tubs are not as durable as cast iron and can be more susceptible to cracking and denting. However, modern acrylic tubs are reinforced with fiberglass, which makes them much more durable than traditional acrylic tubs.
Weight Differences
Another key difference between acrylic and cast-iron tubs is contributed to the weight difference. Cast iron tubs are incredibly heavy and can weigh up to 300-500 pounds, depending on the size. This makes it difficult to move and install, often requiring multiple people or special equipment.
On the other hand, acrylic tubs are much lighter and can weigh anywhere from 60-100 pounds, making them much easier to move and install.
Maintenance Differences
The level of maintenance for each of these tubs also differs greatly. Acrylic tubs do require more maintenance. This is because they are more prone to staining and scratches.
Cast Iron tubs require extraordinarily little maintenance because of their durability. The metal exterior does not scratch easily and does not require regular treatments. Additionally, these tubs are non-porous, which means they will not absorb stains and odors. Homeowners may find that cast iron tubs require more cleaning, but they will not have to worry about deep cleaning or harsh chemical treatments.
Both of these tub materials should be cleaned regularly, at least once a week. We created an article on how to maintain and how to clean acrylic tubs.
Cost Differences
The cost of materials and labor also plays a role in deciding between acrylic and cast-iron tubs. Cast iron tubs are usually more expensive due to the manufacturing process, the weight, and the difficulty of installation.
On the other hand, acrylic tubs are usually much cheaper in comparison. Since they are much lighter and easier to install, they require less labor and are much easier to transport. Additionally, since acrylic is cheaper than cast iron, this may be a deciding factor for some homeowners. However, since acrylic tubs are not as strong and durable as cast iron, they may need to be replaced more frequently.
Heat Retention
Another difference between cast iron and acrylic tubs is heat retention. Cast iron tubs are known for their ability to hold heat much longer than acrylic tubs. This can be a notable feature since they allow you to enjoy a hot bath without having to continually add hot water. Acrylic tubs do not retain heat either, so they cool down faster and require fresh warm water to maintain the heat.
Cast Iron vs Acrylic tub: What is the Best Bath Material for a Bath Remodel?
Ultimately, which material is best for your bath remodel depends on your budget, preferences, and expectations. Cast iron tubs are incredibly durable, heat retaining, and luxurious. However, they are significantly heavier and more expensive than acrylic tubs. Acrylic tubs are much lighter and easier to install, but they do not have the same level of durability as cast iron tubs, but with regular maintenance and care, they can last a lifetime.
Here at DaBella, our Bath & Shower materials are provided by Sentrel Bath Systems. They offer a wide range of beautifully designed patterns, colors, textures, and sizes for our acrylic baths. We also provide professional installation for all our tubs, so you can rest assured that your bath remodel will be completed safely and efficiently. We can help you find the perfect bath or shower for your bathroom and stay within your budget. With our top-quality products and highly trained professionals, you can be confident that your bath remodel is a success. Whether you are looking for a modern, classic, or contemporary look, we have the perfect tub for you backed by industry-leading warranties. Contact us today to get started on your dream bath remodel.
FAQ’s: Cast Iron and Acrylic Tubs
Here are some of our most frequently asked questions from homeowners deciding between cast iron and acrylic tubs:
Can I use Clorox wipes on an acrylic tub?
Clorox Disinfecting Wipes are safe on acrylic because they use a diluted, bleach-free disinfecting formula. The confusion usually comes from conflating the wipes with liquid Clorox bleach, which are very different products. Full-strength bleach chemically degrades acrylic over time, causing surface discoloration and material weakening that is often irreversible. Some tub manufacturers do permit a heavily diluted bleach solution as an occasional disinfectant, but only if rinsed off completely and immediately. For routine cleaning, the wipes are fine, just avoid leaving them sitting on the surface for extended periods, and always rinse after use.
What tubs do plumbers recommend?
Acrylic is the go-to recommendation for most standard bathroom installs. It is lightweight, works with conventional plumbing configurations, and does not require floor reinforcement, making it practical for upper-floor bathrooms and straightforward remodels. Cast iron is what plumbers point to when a homeowner wants something built to last generations. It holds heat exceptionally well and can exceed 50 years with proper care, though its weight demands solid floor support and adds installation complexity. Stone resin has grown in popularity as a middle ground between the two, offering more durability and heat retention than acrylic without the burden of cast iron. Fiberglass is the material most plumbers actively steer clients away from, as its tendency to flex, crack, and degrade quickly results in premature replacements. Kohler, American Standard, and Jacuzzi are consistently cited as reliable brands across all material types.
What are the disadvantages of acrylic tubs?
Acrylic scratches more readily than cast iron or porcelain, and while minor surface scratches can sometimes be buffed out, deeper damage is permanent without professional refinishing. The material is chemically sensitive in ways that catch many homeowners off guard, as bleach, ammonia, acetone, aerosol-based cleaners, and drain cleaner splatter can all permanently etch or cloud the surface. UV exposure and certain cleaning chemicals can cause yellowing over time, particularly in bathrooms with strong natural light. Budget-grade acrylic tubs often flex underfoot, producing a hollow, unstable sensation that undermines confidence in the tub’s structural integrity. Heat retention, while adequate, falls short of cast iron and stone resin, meaning bath water cools faster during long soaks. The overall lifespan typically ranges from 10 to 20 years, significantly shorter than cast iron. For buyers prioritizing a premium, substantial feel, acrylic rarely delivers the same sensory experience as heavier, higher-end materials.
Choose DaBella for Your Next Bath Remodel Project
When deciding on the best bath for your remodel, it is important to consider the pros and cons of each material. At DaBella, we strive to provide our customers with the most reliable and durable bath replacements and products available. When choosing DaBella for your acrylic bath installation, you can trust that it will last for years to come and add value to your home. With the help of our experienced professionals, we can help you find the perfect tub or shower that fits both your style and budget. Contact DaBella today at 844-DaBella to learn more about how we can transform your bathroom into a beautiful and functional space for you and your family.