I'm a quality control manager for a roofing company and R & S Foam Roofing are the only foamers I use. I've done quite a few jobs with them. Each time, they'll come out to look at a project with me and make recommendations for what needs to be done. What they recommend is what I always do. Each roof is different. So, when I call them they give me a rough survey of what needs to be done and they get things timely taken care of. They're really very good.