We have a porch outside our bedroom which has a metal covering it appears to be some form of Tin. Unfortunately I need to lift it as the porch currently runs water against the house. The house is about 20 years old
1. Is this really a tinned product or some other form of metal sheeting that is welded together.
2. How do I remove this and repair = rejoin once I have cut a section out to re-set the base and create a run off away from the house?
Thank you for any advice