2020 PVC Roofing Membrane Cost, Plus Pros & Cons for Flat Roofs

In the single-ply roofing market, PVC roofing membranes offer an impressive set of advantages, unmatched by competitors. Among the most notable benefits are strength, durability, resistance to moisture, wind, fire and chemicals.

PVC membrane installed on a flat roof

Additionally, PVC roofs are consistently chosen by homeowners looking to install an Eco-friendly (green) system over their flat or low slope roof.


Expect to pay in the range of $6.50 to $12.50 per sq. ft. for a mechanically attached residential PVC 50 mil membrane installed over a flat or low-slope roof on a single-story or two-story house.

If the removal of the old roof is required, then your total cost installed could be higher, depending on the scope.

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PVC roofs are specifically engineered for strength, ensuring the membrane’s long service life. The American Society of Testing and Materials (ASTM) requires a roofing membrane to have a minimum breaking strength of 200 pounds per inch.

PVC roofing membranes far surpass this standard, all having a minimum breaking strength of 350 pounds per inch.

DURABILITY — Hot Air Welded Seams

Hot are welded seams are the feature that makes PVC roofing membranes exceptionally strong, durable, and impermeable to moisture. Hot-air welded seams form a permanent, watertight bond that is actually stronger than the membrane itself. — This gives PVC roofs an edge over other roofing systems, which rely on adhesives, tapes, and caulks to seal the seams, and as a result are inherently a lot less durable than PVC.


Exceptional durability and strength lend themselves to a long service life. A properly installed, high quality PVC roofing membrane can last in excess of 20 years, and will not require much maintenance during its service life. This means that once you invest in a PVC roofing membrane, you will be saving thousands of dollars on costly maintenance and repairs for years to come.


With a PVC roof, commercial buildings, such as manufacturing facilities, will not face roofing problems that result from exposure to chemicals, as PVC is highly resistant to chemical damage. Moreover, animal fat from grease vents on restaurants may cause damage to asphalt -based roofs and other single-ply roofing membranes, but will not have a negative impact on a PVC membrane.


PVC roofing membranes have a solid fire-resistance rating. These roofs are difficult to ignite, burn slowly, do not support combustion, and self extinguish when the source of flame is removed. PVC roofing membranes have passed FM and UL fire testing, and have an unlimited slope approval.


Because of their inherent strength as well as heat – welded seams, PVC roofs have superior wind uplift resistance. Many in-service membranes have survived Category 3 hurricanes. A PVC roof is the best choice for low and especially high – rise buildings located in regions prone to strong winds.


PVC membranes are manufactured to remain watertight in extreme conditions. The membrane stands up to constant dampness, ponding water, as well as high and low alkaline conditions. Also, exposure to plant roots, fungi and bacteria have no negative impact on a PVC roofing membrane.


There are many environmental benefits associated with PVC roofing membranes. Notably, the membrane’s high solar reflectivity reduces AC load and energy waste, lowers monthly heating (with insulation) and cooling costs, and helps mitigate the heat island effect in urban areas.

Moreover, vinyl is one of the few building materials that can be fully recycled into new products, even after decades of service life.


IB Roof – Manufactures PVC flat roofing membranes for residential and commercial applications. The company is based in Eugene, OR. Their products are installed not only on the West Coast, but also in New England and Nationwide.

IB PVC membranes available in different colors

Product line includes solar reflective membranes rated by Cool Roof Rating Council. Residential grade membranes come in 50 mil thickness, while commercial-grade membrane are available in thicknesses of 60 mil to 80 mil.

Membranes are available in solar-reflective white and several different colors.

Specialty flat roof decking product called DeckShield is available for walkable flat roof decks.

Duro Last is another PVC roofing manufacturer catering to commercial roof markets. Duro Last membranes are available in 40, 50 and 60 mil thickness.

Lastly, there is a commercial PVC membrane manufacturer Sika Sarnafil that is providing PVC membrane at supposedly TPO membrane prices! 😉

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  1. Hi all, I’m in San Diego and have a low slope roof. I’ve decided on IB roof systems PVC. I’m trying to make the right decision regarding thickness; 50 or 60 mil. There will be very little foot traffic on the roof following installation.

    I will have a solar installation and was planning on having PVC foot pads installed along the perimeter of the array to allow for easy access for cleaning and other maintenance. I’d greatly appreciate any thoughts to help me decide. Thank you, Dan

    1. A 50-mil IB PVC membrane should be 100% adequate for this project, as there is not going to be any major foot traffic and you will have PVC foot pads installed along the perimeter of the solar array to allow for easy access and maintenance.

      The material pricing difference for a membrane of greater thickness, such as 60-mil or 80-mil membranes, should not be too significant. The 50-mil membrane should be completely adequate with the foot pads.

      In terms of mounting the solar arrays on a PVC roof, IB roof has a separate line of anchor products here: https://www.anchorp.com/u-anchors/

      Here are some of the case studies for U-anchors used in solar array deployments on flat roofs: https://www.anchorp.com/news/

  2. I am considering PVC for a flat roof deck. I read that is has a minimum of 200 lb per sq inch puncture rating. There are only two people so the foot traffic will not be heavy. Can this surface stand up to furniture use?

    If not what would you suggest as a material to cover the PVC with?

  3. Yeah, I’ve been putting on built up roofs for 30 years, and I’m getting into PVC. I just got my first PVC job and I was wondering whether or not the contractor has to be certified to put on a PVC membrane roof. I would appreciate it if some one could get back to me soon as possible. Thank you.

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