Regarding tin roof, you're no doubt aware of King Mill's version: <!-- m --><a class="postlink" href="http://www.kingmill.com/shop/product_info.php?products_id=201">http://www.kingmill.com/shop/product_in ... cts_id=201</a><!-- m -->
Interesting product. Thought someone could print its own from textures you get on website specialized in 3D render.
Since Wayne's warehouse is a typical late 19th century building, I was thinking about a batten metal roof much more than corrugated sheets.
Matt
Wayne,IMHO the Walthers Railway Express building doesn't get it for all that many industries or a freight house.I think its more suitable for a knitting company.
I like your new freight house since it looks like a older structure that's been around as long as the town it serves.