How to fix slightly warped RoofI put a shingles over my existing shingles 8 years ago. My roof is slightly warped.The home inspector says that this maybe due to inadequate ventilation in the attic.What contractor should I call to fix this?August 03 2010 - Woburn11YesReport 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.