What should I know about roofing materials to make an informed choice for re-roofing?I am buying a home that still has its original 25 year old pitch roof with two layers of shingles that I believe will need to be replaced within the next few years based on a home inspection as well as an independent assessment from a roofer.The main types of roofing materials I have seen mentioned for use in Arizona are Asphalt Shingles and Metal. I know that Asphalt is cheaper & less durable than metal. I am less inclined to consider (clay) tile because of its price and being more fragile than shingles (bad for hail/severe weather), unless someone can provide more pros or discount the cons that I have listed.What I am looking for are details/resources regarding different types of asphalt, & metal, or any layers (sealant, etc) that go between the roof and the home's structure. That way, I can know what to ask a roofer about the materials they use. Also, do metal roofs require a structural assessment before installation just like tile roofs? Any information you can give or link me to would be greatly appreciated.December 29 2011 - Phoenix00YesReport a ProblemProblemSelect oneOffensive contentIrrelevant contentSpam (pure self-promotion)OtherDetailsYour emailPlease enter a valid email address.Submit CancelContent flaggedWe will review this content. Thanks for helping make the site more useful to everyone. To learn more, read Zillow's Good Neighbor Policy.We're sorry. This service is temporarily unavailable. Please come back later and try again.