range hood duct piping in attic came off..duct run to a vent on my roof.

This would not be a plumbing job. A range hood duct is part of the kitchen ventilation system, not the plumbing system. Reattaching or repairing ductwork in the attic that vents through the roof is typically handled by a qualified handyman. A roofer may also be involved if the roof vent or flashing needs repair, but it would not fall under plumbing. We can definitely help with this type of repair. Let us know if you would like us to provide a free estimate. Troy Handyman Connection Ottawa