Freestanding bathtubs are undoubtedly a luxurious improvement to any bathroom. In fact, choosing the right material is crucial to ensuring that the bathtub not only looks gorgeous but also functions well and lasts for a long time. The selection of freestanding bathtub materials is vast, and each one has its own set of advantages and disadvantages. This article will discuss the most popular freestanding bathtub materials in-depth to help you make an informed decision.

What is the Best Materials for a Freestanding Bathtub?

Acrylic Freestanding Bathtubs

Without a doubt, acrylic is the most typical material used to make freestanding bathtubs. It is also inexpensive, strong, and lightweight. Additionally, acrylic bathtubs are a very popular option for homes because they are simple to keep clean and come in a number of forms and sizes. Besides, acrylic is an excellent insulator, the water will remain warm for longer periods of time. Acrylic has a lot of benefits, but they are outweighed by the fact that it is easily scratched and that exposure to sunshine or harsh cleaning agents can cause discoloration over time.

Fiberglass Freestanding Bathtubs

Fiberglass, on the other hand, is another popular material for freestanding bathtubs. Additionally, it is lightweight, easy to install, and affordable. Fiberglass bathtubs are also easy to clean and maintain. However, despite these advantages, fiberglass is not as durable as other materials, it can crack or chip if not handled carefully. Furthermore, fiberglass bathtubs also tend to flex under pressure, which can cause them to creak or make noise when someone is using them.

Cast Iron Freestanding Bathtubs

In contrast, cast iron is a classic material for freestanding bathtubs. It is substantial, resilient, and has a timeless appearance that many homeowners adore. Also, cast iron bathtubs are excellent at holding heat, so the water will remain warm for extended periods of time. Despite these benefits, cast iron bathtubs can be challenging to install because of their weight. Further, they also need more maintenance than other materials because they may deteriorate if not properly maintained.

Stone Freestanding Bathtubs

The most luxurious material for freestanding bathtubs is stone. It displays a natural beauty that cannot be duplicated by other materials, as well as being strong and long-lasting. The water will stay warm for extended periods of time because stone bathtubs are excellent at retaining heat. Stone bathtubs are relatively heavy which might make them challenging to install despite their advantages. Furthermore, in comparison to other materials, they are also pricey.

The materials used for our freestanding bathtubs

At Pietra Bianca, we take pride in offering high-quality and sustainable bathroom fixtures. Moreover, our freestanding bathtubs are not only stylish and functional but also environmentally friendly, thanks to their unique composition.

Freestanding Bathtubs Materials

Our bathtubs are made of a combination of materials that ensure durability, strength, and sustainability. The composition of our bathtubs consists of:

Crushed, recycled marble natural stone

First, to decrease waste and encourage sustainability, we use crushed, recycled marble natural stone in our bathtubs. Marble also adds elegance and grandeur to any bathroom and is a strong, long-lasting material. Even more, by utilizing recycled marble, we successfully lessen the environmental impact of our production process and support the circular economy.

Calcium carbonate or fine-milled limestone powder

Then, we incorporate calcium carbonate or fine-milled limestone powder in our bathtubs to enhance their strength and durability. Calcium carbonate and fine-milled limestone powder are natural materials that effectively contribute to the structural integrity of our products. Additionally, these materials are abundant and renewable, making them a sustainable and eco-friendly choice for our bathtubs.

Polyester Resin

Thirdly, we use Polyester Resin, another synthetic material, to bond the other components of our bathtubs together.  Polyester resin is extremely durable, resistant to chemicals and water, and temperature-resistant. To further lessen the negative environmental effects of our production process, we use a low VOC (volatile organic compound) polyester resin.

Pigments and hardeners

Lastly, to enhance both the aesthetic appeal and durability of our bathtubs, we incorporate pigments and hardeners. By adding non-toxic pigments and hardeners, we infuse vibrant colors into the bathtubs and bolster their resistance against scratches and stains. This meticulous approach ensures that our bathtubs are both safe for you and the environment.

The combination of these materials, as a result, yields a freestanding bathtub that is strong, durable, and sustainable. Besides, our bathtubs are easy to clean, resistant to scratches and stains, and capable of withstanding high temperatures. Moreover, they are available in a variety of colors and styles to perfectly match any bathroom decor.


In conclusion, freestanding bathtubs offer a range of materials to suit different preferences and budgets. Firstly, acrylic and fiberglass provide affordability and easy maintenance, while secondly, cast iron and stone offer enhanced durability and a classic aesthetic. The choice ultimately depends on personal preference and budgetary considerations.

Our commitment to sustainability is evident in the materials we use. We prioritize recycled and renewable materials, contributing to a circular economy and reducing waste. Moreover, our bathtubs are made with low-VOC materials, non-toxic pigments, and hardeners, ensuring a safe and environmentally-friendly bathing experience.

Therefore, choose Pietra Bianca for a sustainable and luxurious addition to your bathroom.