ROTOL-AMS provides the three essential elements for a successful weatherproofing project; strong credentials, extensive experience and ROTOL GROUP back-up warranties. Our Director of Sealants was part of the committee in the U.S. who sets the standards in the industry. Our highly skill crews have extensive experience and training, each crew installing a performance mock-up to the satisfaction of the client on every job. ROTOL-AMS proven track record and established relationship with manufacturers allows us to offer the best warranties in the business, frequently better than the specifications, and backed up by extensive project management from start to finish with 10 years warranty