Uneven floors where I live too! It took awhile, but I finally found one section near the bathroom tub where the scale works! (I would weigh myself at my parent's home to compare.) I just usually have to move it whenever we use the tub to avoid it getting wet :/
Anyway, I'm scale-addicted. I know it's unhealthy, but I HAVE to weigh myself every few days. It's less to see the number go down, and more to make sure it's not going up - aka accountability!
But, I also take my measurements once a month to chart that progress.
I'll take weight-loss any way I can get it!