ᐅ How to Install a Built-In Bathtub Flush with the Floor: Technical Steps Explained

So, I recently considered recessing our bathtub into the floor so that instead of stepping over it, you would step down into the tub.

Now I’m wondering how this is technically possible or how it is usually done.

When building, is some kind of basin cast into the floor slab at the spot where the tub will go, creating a built-in recess? Or is it done differently?

And is this difficult to achieve on an upper floor? Because if there are living spaces below, the bathtub can’t extend into the room beneath through the ceiling, right?

What options are there that are realistically feasible?

Hello, I saw this about 2-3 years ago. A recess was integrated directly into the foundation slab. However, it seems to be quite a complex process because everything needs to be specially formed, and a reinforcement cage has to be fabricated. The whole thing also needs to be watertight afterward. Additionally, you need to know very precisely where the basin will be placed, as well as how large and deep it should be. There shouldn’t be any issues with wastewater drainage. I wouldn’t install the basin flush with the floor but would leave a 15-25 cm (6-10 inch) plinth. The top part will certainly be even more challenging. But with sufficient construction budget, it is definitely doable. It’s best to consult the architect.

Regards, Thommi

We will install our bathtub directly into the screed on the top floor, which will lower it by about 17cm (7 inches).