When the property managers at Crystal Springs Apartments in Tacoma came to us, their multi-family flat roofing system was in serious need of replacing. As the preferred single ply roofing contractor for Tacoma, WA , our years of experience as a flat /low slope roofing contractor was very valuable. We accessed their existing roof and recommended a Carlisle Single-Ply TPO 60 mil roofing system as a replacement. Above are the photos of Crystal Springs Apartments after we installed their new single-ply system. The property managers were very happy with their new Carlisle flat roof. This roofing system has a great 20 year NDL warranty. A NDL or "no dollar limit" warranty is one of the best offered because it entails that the property manager is protected from any liability and the manufacture, Carlisle will be responsible for all workmanship, material, and labor on anything that may go wrong on their roofing system for 20 years.