Birds Pecking SPF Foam Roof

I have heard of this phenomenon, and seen it myself a few times. But we have a few million sq. ft. of SPF roofs on and have only experienced it on 2 roofs. Curiously, both are a particular manufacturer's foam, and they use a formulation called "sugar foam." Tom Hay still around?

The foam is cited with silicone, btw.

I don't know what sugar foam means, but if it is a sugar-based product, I'm wondering it the birds like the taste of it?

The issue it presents is complicated. One of the roofs has had around 500 spots we have repaired, some as big as a baseball. We have done this at our cost but it's really not a warranty issue. In a perfect world it should be an insurance claim, but we are reluctant to ask our customer to file a claim because we have no reason to think it won't be an ongoing issue.

Well, we can't fix bird pecks for free for the next 20-years! The building owner thinks the manufacturer should have known about this "risk" and informed him or at least me.

What are your thoughts on this, aside from you not liking SPF? :-)

Here a old bird we found in a SPF roof on a residential house. It had burrowed in from the fascia though. Still entertaining.