As a noun or adjective, rollout is one word. Some publications, especially British ones, prefer the hyphenated roll-out, but the one-word form is well established and fairly common even in the U.K. When you need a term meaning to implement a product, service, or policy, use the two-word phrasal verb roll out. Rollout doesn’t work as a verb.
Examples
Rollout
Of course, paying for the sensors in that infrastructure is another matter, so rollout for such a system may take a while. [USA Today]
This first version is wi-fi only, and a high-speed 3G version will come soon thereafter, a similar rollout plan to that of Kindle. [Wall Street Journal]
The funding round has been interpreted as a sign that Spotify’s long-delayed US rollout could be announced within weeks. [Guardian]
Roll out
This was despite the Liberal leader’s continued reluctance to roll out major policy initiatives. [Sydney Morning Herald]
A cavalcade of limousines will converge on the provincial legislature, but don’t look for the province to roll out the red carpet for this rally. [Winnipeg Free Press]
Luxury hotel chain Fairmont is to roll out BMW bikes to all of its worldwide hotels, it confirmed this week. [Independent]