The TPO membrane roof was completed this past week. Overall, its a 100% improvement over the old roof, and I hope it will last until our daughter gets through college (with some maintenance). I paid close attention to the install method out of curiosity, since it seems like there are at least 3 choices out there. 1. 'fully-adhered' - the TPO membrane is glued to the substrate 2. 'mechanically-fastened' - the membrane is fastened to the roof with circular metal plates with screws through them (like huge washer) 3. ' RhinoBond system ' - relatively new idea where an electro-magentic induction 'welder' heats up the metal fastener plate *through* the membrane, and the membrane sticks to the plate with the aid of a weighted magnet to help the weld set (magnet top - TPO middle - hot fastener bottom). The advantage of this is you can put the fasteners anywhere under the TPO, use less fasteners, and you don't need to create a hole in the membrane. ...
