Many things may go wrong with low-slop (flat) roof system and there is no “bullet proof solution”.
There are many roof system components not necessary compatible with each other.
There are many different ways of proceedings to accomplish the end result, as long as you are well aware of what the end results should be. Somebody's way of “covering” one issue may cause other to fail.
Deep understanding and being aware of what may go wrong is a key to design low-slop (flat) roof assembly.
Making sure that the project is done as it was designed is the other key to success.
Our GAF Roofing Contractor Certificate for commercial single play roofing systems such as TPO, allow us to provide GAF extra value warranties to our customers, where GAF trusts us on installing TPO roofing system to their highest standards.