If it can be shown that there was indeed defective workmanship that resulted in proximate and actual damages to your home, you may have grounds for a negligence suit or one rooted in defective workmanship. Were you aware that the air conditioner was annexed in such a fashion, but conceded to it nevertheless? Did you express disdain as to how the A/C unit was installed? Were there representations made to the contrary as to how the A/C was actually installed? These questions must be addressed before you can proceed. Consult a local litigation attorney and if you have a contract for services, specifically referencing how the A/C unit was to be installed...and there was a significant deviation from same that you did not concede to...you may have actionable grounds. More facts are required to give a definitive response in this forum. Good luck to you.
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