The National Roofing Contractors Association has expressed concerns regarding the long-term warranties offered by many roofing contractors and material manufacturers because warranties do not necessarily provide assurance of satisfactory roof system performance. Warranties often contain provisions that significantly limit the warrantor’s liability and the consumer’s remedies in the event that problems develop or damage occurs to the roof system. Your greatest asset should be protected by a proven roofing system installed by a competent and experienced contractor with long term relationships with clients that will verify their abilities and qualities.