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Decoration

Bathtub: what it is and tips for having one

Learn how to choose, install, and care for your soaking tub to transform the bathroom into a relaxing and stylish projects.

By CASACOR Publisher

Submitted at Nov 28, 2025, 5:00 PM

08 min de leitura
Banheira de imersão Ohtake, desenhada por Rodrigo Ohtake para a Roca.

Banheira de imersão Ohtake, desenhada por Rodrigo Ohtake para a Roca. (Ruy Teixeira/Divulgação)

The bathtub has become one of the most desired items in decoration projects thanks to the combination of aesthetics, comfort, and the feeling of spa at home. Unlike traditional models, it is designed to allow the body to be submerged more deeply, contributing to muscle relaxation and a more intense sensory experience.
Léo Shehtman - Memories. CASACOR São Paulo 2023 project. In the photo, bathroom with bathtub and integrated garden.

Léo Shehtman - Memórias. Projeto da CASACOR São Paulo 2023. (Adriano Pacelli/Divulgação)

Today, it can be found in bathrooms of various sizes and styles, as it offers great creative freedom when composing the projects. Whether as the central piece of the layout or positioned next to a window, its presence completely transforms the atmosphere of the space.

What is a bathtub and why is it so desired


BC Arquitetos - Casa Magenta LG. Project of CASACOR São Paulo 2023. In the photo, black bathtub, terracotta wall, and curtain.

BC Arquitetos - Casa Magenta LG. Projeto da CASACOR São Paulo 2023. (MCA Estudio/Divulgação)

The bathtub is a model designed with high walls and an ergonomic shape, allowing water to cover a large portion of the body while the user remains seated. This depth ensures deep relaxation, stimulates blood circulation, and creates a cozy feeling ideal for those seeking moments of self-care. In addition to the functional aspect, this type of bathtub also has a strong aesthetic appeal, functioning as a sculptural piece within the bathroom.
Mustard yellow and blue give personality to a 227 m² apartment. Project by Tetriz Architecture. In the photo, bathroom with bathtub and deck.

Projeto de Tetriz Arquitetura. (Renato Navarro/Divulgação)

Another reason for its popularity is the installation freedom. Unlike built-in bathtubs, the bathtub is installed directly on the floor, without requiring masonry. This makes renovations easier, reduces construction time, and allows it to be positioned in different points of the projects — from the center of the bathroom to areas next to the window or even integrated into the bedroom.

How to choose the ideal model for your bathroom


1960s apartment receives modernist décor full of design. Project by Beta Arquitetura. In the photo, bathroom with bathtub and bench.

Projeto de Beta Arquitetura. (Juliano Colodeti, do MCA Estúdio/Divulgação)

Choosing the right bathtub involves considering the size of the project and the desired style. Compact bathrooms call for smaller models, usually oval or round, which offer comfort without compromising circulation. In contrast, spacious areas allow for larger or sculptural design bathtubs, making them protagonists of the decor. Measuring the space accurately is essential to ensure proportion and functionality.
Apartment filled with natural light has a privileged view of the treetops. Project by Patricia Martinez. In the picture, a bathroom with a bathtub.

(Fran Parente/Divulgação)

The materials also influence comfort and durability. Acrylic bathtubs are light and accessible; mineral resin models keep water hot longer and have a sophisticated appearance; stone or metal options ensure high visual impact but are heavier. Additionally, evaluating ergonomics — depth, angle of the backrest, and internal width — is fundamental. Whenever possible, try the model in a showroom to understand if the shape adapts to your body.

Where to install the bathtub: positioning and infrastructure tips


Old apartment is modernized without losing the original layout. Project by Barbara Dundes. In the photo, bathroom with a support bathtub.

Projeto de Barbara Dundes. (Fran Parente/Divulgação)

The positioning of the bathtub directly influences the aesthetics and user experience. Many users choose to place it near windows to take advantage of natural light and create a relaxing atmosphere. In bathrooms integrated with the bedroom, it can serve as a highlight element, reinforcing the spa sensation. Ideally, place it away from circulation areas and ensure the project has adequate ventilation to avoid excessive humidity.
On an incline, a metal structure house is built above street level. Project by PKB Architecture. In the photo, a bathroom with a bathtub and stone wall.

Projeto de PKB Arquitetura. (Fotos: Denilson Machado, do MCA / Produção visual: Studio Jefferson Stunner/Divulgação)

The hydraulic infrastructure is another fundamental point. Although it does not require masonry work, the bathtub needs hot and cold water supply and an efficient drainage point. If installed on the second floor or in an apartment, checking the weight of the filled bathtub is indispensable — some models require structural reinforcement. Privacy elements, such as screens, curtains, or frosted glass, can also be added according to the decorative proposal.

Care and maintenance to prolong the useful life of your bathtub


Ana Maria Miller, Elisa Torres and Tainá Torres - Feel at home. Project of CASACOR Goiás 2023. In the photo, bathroom with stone wall, bathtub and clothes hanger.

Ana Maria Miller, Elisa Torres e Tainá Torres - Sinta-se em casa. Projeto da CASACOR Goiás 2023. (Edgard César/Divulgação)

The maintenance of the immersion bathtub is relatively simple, provided it is done regularly. Cleaning should be done with a neutral detergent and a soft sponge to avoid scratches, especially in white or shiny models. Materials such as natural stone or metal may require specific products, like sealants, to maintain shine and resistance.
800 m² country house in Petrópolis receives mountain-inspired décor. Project by João Panaggio. In the photo, a bathroom with a bathtub and a view of the mountains.

Projeto de João Panaggio. (Denilson Machado, do MCA Estúdio/Divulgação)

After use, rinsing the bathtub removes residues from essential oils, salts, and foams, preserving its appearance and preventing stains. Drying wooden surfaces of accessories, such as trays and shelves, also helps to avoid warping. Finally, periodic inspections of the hydraulic part ensure that there are no leaks and that the heating system functions correctly, prolonging the useful life of the bathtub and maintaining safety.
Marcela Penteado Architects - Loft 011. Project of CASACOR São Paulo 2023. In the photo, bedroom with curved shelf and integrated bathtub.

(Renato Navarro/Divulgação)

CASACOR Publisher is a content creator agent, developed by the CASACOR Technology team based on the knowledge base of casacor.com.br. This text was edited by Yeska Coelho.