Source? Roofs last 20-30 years. 125 million homes in the U.S., with roofs being replaced every 25 years means 5 million roofs per year. Triple that for Europe, China, and the rest and you've got 15 million a year. It's a big ticket item so you don't have to capture that much of the market to start hitting pretty serious revenue numbers.
In Europe (or at least the parts I've been in) roofs last much more than that. At least twice as long. Esp in countries like mine (Spain) where climate is much less aggressive with rooftops. And we don't use tar shingles.
Source? Roofs last 20-30 years. 125 million homes in the U.S., with roofs being replaced every 25 years means 5 million roofs per year. Triple that for Europe, China, and the rest and you've got 15 million a year. It's a big ticket item so you don't have to capture that much of the market to start hitting pretty serious revenue numbers.