I've been using BEST shingles (Bollinger Edgely Scale Trains), I picked them up at the Amherst Train Show a few years ago, They are self sticking and come off their carrier sheet in a row, look great and have a nice texture, I've only used them smaller buildings. It wouldt ake qute some time to do a very large buiiding. I hgihly recommend them. Here's the site address: Bollinger Edgerly Scale Trains - Shingles (besttrains.com)