Single-ply membrane roofs (TPO, PVC, and EPDM) are typically fastened to commercial buildings in one of two ways: mechanically attached or fully adhered (there are others but these are the most popular). Virtually all roofs sit on top of a layer of insulation or cover board that rests between the single-ply membrane roof and the structural roof deck.
Here is a quick comparison:
Great wind uplift resistance (depending on attachment method)
Superior wind uplift resistance
Good resistance (depending on substrate)
Superior resistance (depending on substrate)
Lower due to air intrusion and fluttering of the membrane
Higher – acts as an air barrier
So which is best?
- That all depends on your budget, type of building, and your performance expectations.
- A Fully Adhered system will out perform a Mechanically Attached system every time.
- When it’s time for a new roof, always consult with an experienced and trusted roofing contractor to determine the best system for your building.
Pro Tip: Mechanically Attached and Fully Adhered both require proactive preventative maintenance programs to prevent hazards from becoming leaks and to prolong the life of the membrane. Manufacturer’s require a maintenance program to keep the warranty in good standing. Rhoden Roofing offers a preventative maintenance program called RoofCare. RoofCare is designed to save building owners money, increase the lifespan of the membrane, and reduce headaches that come from unexpected & preventable leaks.