Most common ways thieves break into a house under rehab?

[Account Closed]

Hello everyone,

I just got a call from my contractor some thieves broke into my rehab and they stole some copper from the main line in the basement. 

What are some suggestions/security measures you take to prevent this from happening? I'm thinking about buying security cameras and install them outside the doors, not sure what to do about the windows. Any feedback would be greatly appreciated.