COP v3.0:site-practice; completion

12.7 Completion 

The roofing contractor should notify the main contractor, architects or owner when he has completed the scheduled work. If the contract is completed to the satisfaction of all parties, the roofing contractor should be released in writing from further obligations, except those included in warranties. Any subsequent damage should be the responsibility of the main contractor or owner.

All gutters, valleys, roof channels and the roof cladding should be left clean and free from debris on completion of the work.