ᐅ Sealing of the Bathtub

Hello! We are building a prefabricated wooden house, and the bathtub has just been installed. The company did not waterproof the drywall back wall at all; they installed the bathtub and only sealed the top edge of the tub. Shouldn't this wall be properly waterproofed on the drywall to prevent water from entering through leaking joints or around the faucet, which could cause the drywall to swell? The construction company says this is fine, claiming the bathtub is sealed to the wall with silicone. But from the bathtub upwards, you can only see the drywall. We are very uncertain and unfortunately have no technical knowledge ourselves and feel completely at the mercy of the company. Thank you very much for any help. Best regards, hawaii2010

The wall will be tiled, right? I think that's quite common, as it was done in your case. You just have to be meticulous with the silicone joints and replace them after a few years if cracks appear or if they become porous. If everything is installed correctly, there should be no problems.

It will be done the same way for us as well; the tiles themselves are waterproof 🙂

In my opinion, this is not correct.
Walls behind bathtubs and showers should usually be coated with a waterproof slurry before tiling, and it should not be applied too thinly.
In our case, this was done and even had to be redone because the inspector said it was insufficient.