Walking (safely) On A Metal Roof - Roofing - DIY Home ...

Be sure to get something in your contract (in writing) that you will not be responsible for any shoe prints or any other normal foot traffic marks on the roof.

If you damage it, yes...you should be responsible.

That being said, if the finish is beyond serviceable and the surface is very chalked, even light foot traffic will show and you will be on the hook for it.

Just giving you a heads up and you should very carefully inspect the surface prior to walking it.

Source: http://www.diychatroom.com/f9/walking-safely-metal-roof-134980/

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