I don't want the floor installers to use my bathroom, thoughts?

This week is going to be hell as they are going to spend several days moving furniture around and installing a whole new floor. I am temporarily staying at my mom's new condo, and the builders refused to put in a new floor and insisted it was fine. The floor is falling apart, and so they had to agree to completely pay to replace it. I am very germaphobic and anyone other than my close family using my bathroom REALLY bothers me. I don't want random people I don't know using it, so I'd rather them use the master bathroom which is more inconveniently situated as it's not right out in the main hall, but it bothers me. Thoughts?
I don't want the floor installers to use my bathroom, thoughts?
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