This video is on the removal and reinstallation off an 8 year old roof mounted solar PV system. Shingle roofs should be brand new when solar panels are installed. This roof should have been replaced before the panels were installed. The solar company should not have installed the solar on this roof. The previous solar company had poor wire management, did not install enough flashings for the array, and had poor workmanship overall. High volume solar seems to = low quality. Be carefull out there folks....