Not preparing well enough
The bathroom you design is supposed to stay there for many years to come. So ask anyone, and they will all agree that you need to invest a proper amount of time in its layout, design, and style if you want something good.
If you fail to prepare, you should prepare to fail (see what I did there?), so just make sure you’ve decided and you know exactly what you want. Be aware of those small details too, as a poor preparation strategy might be fatal for your project.
An example of very poor preparation is failing to consider the depth of the bathroom tiles before you install a shower valve. Poor attention to detail will only show to be extremely expensive and might cause the shower wall to hang over the bath. Trust me, it will NOT look good.
Please send me info o bathroom