Nicholas Thompson

Roof Maxx is basically a soy-based shingle “rejuvenator,” not an acrylic coating. The idea is it soaks into aging asphalt shingles and restores flexibility, which can help on roofs that are still structurally sound, but it’s not a fix for bad flashing, leaks, nail pops, lifted tabs, or heavy granule loss. So IMO: not total snake oil, but definitely not a miracle either best case it may buy time on a borderline roof, worst case it delays the inevitable.

Shingles shouldn’t directly touch stucco there should be proper flashing and a gap to allow water to shed and avoid wicking into the wall. If the roofer installed flashing behind the stucco and under the shingles, that may be okay, but check the shingle manufacturer’s installation guide. Some require a small clearance from vertical surfaces. It’s worth confirming otherwise, you could see water intrusion or premature shingle wear later.