Don't know how long your foam roof has been down but with some routine maintenance they will last a long time. A quality elastomeric coating applied periodically will keep everything sealed up and help protect the foam from UV damage. If your roofer is not trying to sell you a new foam application, you're most likely ok and he is an honest example of the trade. You might want to ask him about an elastomeric top coat to help extend the life of the roof. If you know the brand of the foam he applied or even if you don't you can always do a general search for foam roof maintenance to get a general feel for what to expect.

Thank you for your reply - but now I realize I'm confused. It's been so long that I don't remember whether my initial deal was for the foam or the coating. The coating, I think. I have a coating that's slightly thicker than the norm. But by now, several years out, getting some blisters. I was asking about getting the elastomeric patched or re-done, and he's saying to just wait (presumably wait until it leaks) and then get a whole new roof, for god knows how many thousands of dollars that I don't have. When I asked how the roof looked, he shrugged that it could last another few years - or could spring a leak tomorrow.

Time to get another opinion. Kyko and Lyons have fairly good reputations... but just about every company has made someone unhappy. The truth floats closer to the surface when you get when you get multiple viewpoints.