remodeling the house..

I just wonder if it's all about cultural differences between America and my own country, Japan.
We currently had a remodeling construction. We were away while they were working on it. Since they tried to finish their works for remodeling project, they stayed at our house. ( I was notified after they started to live in our house by my husband whom had been also informed by his friend who managed to talk with the construction workers). The thing I say ' cultural differences ' is that the workers used my brand new laundry machine without asking for permission. I might sound sick though, I love doing laundry and looked forward to using this new laundry machine. I was so shocked to see the laundry machine was working when we went to check their work.
I heard that they were staying at our house, so I understand that they were using the fridge and the bathrooms. But is it natural that the workers use the brand new stuff without asking for permission? They also used our new dishwasher, too.
I am a sort of clean freak. I don't like to share something private, especially something to clean with people whom I don't have any intimate relationship with me. I do have a perception that there are something we share to use, such as public toilets, apt's laundry machines, and I don't mind sharing those with others. But it's our house's stuff yet they are brand new appliances. I felt so sad to face to this unbelievable reality...

My husband says that we Japanese are clean freak, so I am very sick on that part.
But in this case, I simply wonder if it's just about cultural differences between us or simply because I am narrow minded..

I am sorry but thank whom read my untidy unhappy notes here.
I would appreciate if you would tell me what you think about this situation.

Best,
miki