So, I'm scrapping a house that recently burnt down...

If it had a lightning rod, then my guess would be its a copper braid. If there is still a rod up there, I would suggest looking it up. Some of those are considered vintage, and will fetch some coin. Also introduce yourself if you haven't already, and lets see some pics

I actually did introduce myself a few hours ago here: http://www.scrapmetalforum.com/intro...ead-start.html I'll upload pictures tonight.

The twisted mystery metal could be "flashing". Usually a tin metal that is used for several different applications on the roof, but also other areas in all buildings. Flashing will be used up on the roof at the plumbing vents (stacks). Commonly found at the peeks and valley's as a sealing moisture barrier. Will also be along the entire perimeter of the roof, what's called the "drip line". Just a some what of "educated" guess, as your description is a little vague (twisted metal going in different directions). Flashing is fairly thin, has many different shapes and sizes. Extensively used on roofs, especially at any opening or access point leading into the buildings interior (pluming and air/exhaust venting). Sometimes used in large sheets for temporary repairs and then "covered over" with permanent roofing materials. Have seen this especially in more rural locations, where building materials and "skilled" labor is not always available. Sometimes you do with, what you have, when you have too!