A Torch on system is very popular roofing option for a flat roof scenario.
A Torch on System is commonly used as part of a 2 layer system, which comes in a variety of self finished mineral colours providing a decorative solar reflective finish to this built up waterproof system. A Torch on System guarantee can range from 10 - 20 years. A technical and professional installation.
For a professional explanation of the Torch on System