Choosing the right roofing system for your facility requires considering many aspects. Utilizing the right materials, design, and manufacturing process results in a complete, integrated roofing system that performs reliably over the long run.

Location and Weather
There is no effective one-size-fits-all roofing system because geographic variations in wind velocity, potential snow load and annual rainfall all figure into choosing the right roofing system.

Durability and Roof Traffic
Some roofs have very little traffic, while others require walkways that provide access to rooftop units. Roofs with high foot traffic needs require additional structural pathway support. A high-performance roof meets or exceeds performance requirements for long life: all-weather reliability;
chemical, fire, and puncture resistance.

Maintenance Requirements
All roofs need some periodic maintenance or inspection, but not all roof systems are created equally in this regard.

Energy Savings
Everyone wants to save money on utility costs. A cool roof will be very beneficial in several ways to reduce energy consumption.

Future Plans
If you want to sell the facility soon, roofing cost is an important factor. If you plan to retain ownership for 10 years or longer, it pays to invest in a roof system that has a guaranteed long service life and warranty.

You want a roof that protects your assets and your investment. Our specialists will evaluate your facility and help you choose the solution that best suits your building, your needs, and your budget.

PVC Roofing

Duro-Last CoolZone

Why is Duro-Last known as the “World’s Best Roof”?

The custom-fabricated, single-ply Duro-Last commercial roofing system is ideal for any flat or low-sloped application. Extremely durable and easily installed without disrupting building operations. The Duro-Last roofing system is also watertight, highly reflective, able to stand up to all types of weather, resistant to chemicals, fire and high winds, and virtually maintenance-free. Over two billion square feet of Duro-Last membrane have been installed.
Duro-Last PVC roofing systems have been installed on all types of commercial, industrial, and institutional buildings throughout North America.


Every Duro-Last single-ply roof is measured and manufactured to exact size, accommodating every rooftop penetration. Prefabricating the vinyl roof membrane in our controlled factory environment eliminates up to 85% of seaming that is done on-site during rooftop installation, and improves the long-term performance of the roofing system as well reduces the material waste associated with the installation of most rolled systems. This precise attention to detail ensures an excellent fit and delivers worry-free, leak-proof protection. We can even assist your architect, facilities or maintenance personnel in developing specifications for your roofing project.


The Duro-Last roofing system, made from a PVC membrane, is resistant to fire, chemicals, grease, high winds, and punctures, and easily accommodates wide temperature extremes.

Installed With No Disruptions

Building occupants will hardly know a new roof is being applied, because installation is quiet and safe. Our PVC roof membrane is mechanically-attached to the deck. There are no loud machines, no hazardous materials, no noxious fumes, no hot tar, and no mess. Duro-Last roofing systems can often be installed over an existing roof without an expensive tear-off, virtually eliminating dust or falling debris that could interfere with building activities or damage sensitive equipment.


PVC roofing systems make an important contribution to sustainable buildings, and Duro-Last is proud to be a charter partner in the EPA’s ENERGY STAR® Roof Products Program. Of the white, single-ply products rated by the ENERGY STAR program, only the Duro-Last Cool Zone roofing system has retained reflectivity of greater than 85% after three years of weathering (based on ENERGY STAR roof products testing criteria). The high sustained reflectivity delivered by our white PVC roofing membrane is saving significant energy and money for building owners all over the United States.

Green Sustainable Roofing

In some circles, “green roof” means “vegetative roof.” But in fact, the term “green roof” really refers to a roofing system that’s sustainable. That is, it provides the long-term environmental benefits that building owners and managers are seeking for their high-performance commercial, industrial, and institutional facilities. This is what we mean when we say “green”:

  • A green roof is cool. It has high reflectivity and emissivity values that reduce the amount of heat transferred into a building. This translates into reduced energy costs (in virtually all climates) and increased comfort level and productivity for building occupants.
  • A green roof is lightweight. It requires less fuel to transport to the jobsite than other roofing systems. In many cases, it can be installed over an existing roof without an expensive and land-filling tear-off.
  • A green roof is solar-ready. It can accommodate the wide variety of rooftop photovoltaic equipment that’s available today.
  • A green roof uses environmentally-friendly processes. Manufacturing a green roof requires less energy than other roofing materials, plus minimizes scrap. The scrap that is produced is recycled back into production. Installation creates little material waste, and the roof is recyclable at the end of its useful life on the rooftop.
  • A green roof is one that can help facilities obtain credits toward the US Green Building Council’s LEED and LEED-EB certification. The LEED program and a similar program called Green Globes are well-established and aid in the high-performance building design process. Manufacturers of green roofs also are recognized by the EPA’s ENERGY STAR® Roof Products Program and the Cool Roof Rating Council (CRRC).

The Industry’s Best Warranties

Duro-Last is so confident they protect commercial and industrial installations with the best warranties in the industry. The standard, comprehensive 15-year full warranty is transferable, has no exclusions for ponding water, and provides coverage against consequential damages that result from defects. Duro-Last also has 20-year warranties available.

TPO Roofing

Thermoplastic polyolefin (TPO)

has become the fastest-growing segment in the commercial roofing industry.

The primary thickness of a TPO membrane is 45-mils with 60-mils fast becoming the standard. There are also 72-, 80-, and 90-mil membranes available. White TPO membrane features an initial ENERGY STAR and CRRC solar reflectance of 0.79, thermal emissivity of 0.90 and an SRI (Solar Reflective Index) of 99.

The flexibility of TPO makes it highly resistant to tears, impacts, and punctures, in addition to allowing for building movement. The membrane remains flexible in hot and cold temperatures for maximum durability and long-term performance. The smooth top surface is designed to resist dirt, debris, mildew and bacteria build-up. That means you get a cleaner, more solar reflective membrane throughout the life of your roof

The TPO membrane can be mechanically-attached (screwed) or fully-adhered (glued). When it comes to the seams and the detail work, the membrane can be adhered or heat-welded.

A key component of a TPO membrane is its laminated nature. The material that you see on top is not the same material you see on the bottom. Often the top is white and the bottom is gray. This is because it is not the same material through-and-through. A wearing surface is provided on top and filler material is provided on the bottom. Fiber reinforcement can be added to a TPO membrane that does make it stronger and more durable.

TPO membrane comes in rolls averaging 8 feet wide by 50 or 100 feet long. This means a high quantity of seams are created during the installation process. Seams are the weakest part of any roofing system. The more seams that have to be field-welded or glued increase the probability of human error.

TPO installation can be accomplished with little or no disturbance to building occupants. TPO membranes are an ideal choice for re-cover applications because they are lightweight and can re-cover almost any roof type, which eliminates disposal costs and keeps aging roofing materials out of landfills.

Warranty options range from 10 to 20 year coverage.

Metal Roofing

Aesthetically, a metal roof is versatile in design to compliment many architectural styles and can be used on both low-pitched and steep-pitched roofs. We offer a wide array of metal roofing solutions. Metal roofing is extremely durable and long-lasting in adverse weather conditions such as hail and wind.

Roof Coating

A roof coating is a fluid applied roofing membrane. It has elastic properties that allow it to stretch then return to its original shape without damage.

Typical roof coating thickness can vary from paint film thickness to more than 40 mils. This means a roof coating actually becomes the top layer of a roof membrane. As such, the roof coating is the topmost layer of protection for the membrane, receiving the impact of sunlight (both infrared and ultraviolet (UV), rain, hail and physical damage.

Roof coatings are seamless and when installed correctly, can solve roof leaks on almost any type of roofing material. Roof coatings can add years to the service life of a roof and reduce the amount of discarded roofing materials that end up in landfills. Field studies have shown that cool roof coatings can lower rooftop temperatures and reduce air conditioning bills.

Manufacture References

Reference Letter from Duro-Last


Reference Letter from Carlisle