This was my first time ever using Zimmerman's Roofing. I think they offer a really good 30 year warranty on their roof,so, should I ever sell my property the warranty is passed off to the new home owner. I think the roofers did a terrific job with putting on the new roof. However, they did a poor job with the drip edge; after a few weeks this was fixed. I didn't appreciate how they left their trash behind after they had ate lunch and the smell plus the debris attracted my dog ( I don't understand why they didn't put their trash in the garbage cans). I notified the head foreman since their materials were left behind in my yard for about 5 weeks although I was told that next day someone from the company would be by to pick up their material which never happen until weeks later as stated above. I think they need more training and organization.