The Wall Flats are not suitable for direct water contact. They would be fine as a feature wall in a bathroom but not inside and actual shower. Please let us know if we can answer any additional questions or be of help in any way.

can these be put to fit a space? (i.e. around a window or door)

Yes the tiles can be cut with standard power tools or a utility knife. If we can answer any additional questions please let me know.

do these tiles muffle sound?

The tiles have not been tested for acoustic properties but because of the material composition and opposing angles they do provide acoustical benefits. The Wall Flats have been used in many theaters, recording studios and public spaces for this exact purpose. Please let us know if you have any additional questions.

How many sq ft is per box

It say 10 tiles but doesn't say how many sq ft per box

22.5 Square feet