TPO Vs PVC Roofing: What is the difference?
PVC and TPO are two types of single-ply membranes used on flat and low-slope roofs. TPO was supposed to be an effective alternative to PVC, although the two have distinct qualities and properties. As a result, property owners may find it difficult to choose which material is ideal. Continue reading to learn more about the similarities and differences between TPO and PVC, as well as which one to choose.
Overview of TPO and PVC roofing
TPO
TPO roofing consists of polyethylene or ethylene thermoplastic bonded to ethylene propylene rubber. TPO is energy-efficient, recyclable, environmentally benign, and lowers UV rays. However, because it is less chemically resistant, it may not be the best choice for applications involving harsh chemicals or grease traps.
PVC
To promote flexibility, PVC roofing material contains polymerising vinyl chloride monomers as well as plasticisers. PVC is chemical, weather, and puncture resistant, and its flexibility makes installation easier. However, some plasticisers used in PVC degrade quickly.
Similarity of TPO and PVC
TPO and PVC are both flexible, energy-efficient, and come in white and other colours. They also reflect up to 91% of UV rays, which reduces the demand for HVAC systems. Both can be installed in the same way, entirely attach to the same surfaces or manually fasten the membranes to a hard subsurface, such as Densdeck or ISO board. Fully adhering provides a smooth finish and allows for installation on structural or lightweight concrete, as well as any other surface where mechanical installation is not possible.
Differences Between TPO and PVC roofing
TPO and PVC have some differences in terms of following parameters.
Cost
PVCs are more expensive than TPOs. However, not all TPOs are created equally, as you can get both low-cost and high-quality TPOs.
Grease Resistance
TPO does not withstand grease, animal fats, or acids. Grease traps and cooking exhausts will quickly degrade a TPO roof. However, PVC is effective against grease traps.
Fire Resistance
Compared to TPO, PVC is highly resistant to fire which makes it a good choice for low-sloped roofs that have balconies above them.
Ponding Water Resistance
TPO does not survive standing water. Nonetheless, PVC is waterproof, so it can withstand standing water and even continual wetness.
Flexibility
PVCs are more flexible than TPO due to the use of plasticisers. However, plasticisers can permeate the surface and flash off in a low-quality PVC membrane.
Weather Resistance
Though high-quality TPO may withstand weather if put correctly, it cannot withstand excessively hot temperatures. In contrast, PVC can resist extremely high temperatures.
Should I Install PVC or TPO Membrane?
While both PVC and TPO have some advantages and disadvantages, the one you choose depends on your budget, property’s location, and condition. You can hire a roofing service or contractor to consult with to help you make the right choice.
Looking for the best commercial roofing service in Winston-Salem or surrounding areas? Contact Applied Roofing Services today at (336) 937-9673 for more information on commercial roofing solutions. You can also get a quote online.
