Litko gives you terrain builders a little help with shingling with their new Rooftop Shingles strips.
From the release:
Shingle strips for your scratch building projects. Now you can quickly and easily add decorative shingles to any building roof.
Designed for use with 25-28mm sized miniature game buildings. Each shingle is 6mm wide by 12mm tall allowing you a range of layout options for different patterns. Mix and match the shingles for a unique look on each of your buildings.