Two years after launching Straight Cold Rollin in Sundance, Josh Kammerer no longer quite fits the description “local business”. Today, he has clients based in states as far afield as Texas – and in countries as diverse as Haiti and Tanzania.

“It’s been a little bit of a rollercoaster, I didn’t quite expect it to do what it’s doing – but hey, who am I to complain about it?” he laughs.

Using a computer-controlled roll former, Kammerer designs the layouts and components for buildings in the software and then, in layman’s terms, “prints them out”. The individual compone...