Great seeing you at the sketchcrawl, Rita! I really like how this drawing turned out--the crispness of the pen lines do a great job of defining the structure, so the watercolor can communicate the rust and decay clearly. I especially like how you captured the blue sky peeking through the windows, that pretty reminder that indeed, there's no roof left there!
Your drawing shows the derelict building to advantage...very nice. I especially like how you treated the sky showing through the warped windows.
Just a really well done sketch! You did a great job of the spaces through the windows.