What are my rights against roofing company when the final bill is more than what was originally contract for

I think you should communicate with the roofer and explain your concern. Tell him you will pay the contracted amount, but unless he has a valid change order authorization the installation of the additional squares you won;t pay for them. He might sue you, and if he does you will need to tell this story to the judge. You should review all hte paperwork before you do anything rash. Good luck.

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