Spray Polyurethane Foam and Duro Last go head to head in the market, the reason being that they both have the same benefits for your commercial roof. However, some may say that Polyurethane Foam is better than Duro Last and some may say the opposite. Well, we are going to compare them both and see exactly product is more beneficial for your roof.
What is Spray Polyurethane Foam?
When talking about Polyurethane Foam, the question you might ask is, what is the sole purpose of Polyurethane and how can my commercial roof benefit from it? What are the benefits of installing the spray polyurethane foam roofing system and how would it outweigh the advantages of other roofing systems? Many manufactures use SPF simply because of the ease of installation, the impressive performance, affordability, and durability. Property owners love the idea of it because of the protection it provides for their roof. Some of the benefits that SPF provides are energy efficiency, durability, a seamless surface and it’s environmentally friendly. Sprayed Polyurethane Foam has been used as a commercial roofing and insulation material for over 20 years.
Energy Efficient Insulation
Spray Polyurethane Foam provides the highest level of insulation against air and moisture, it also provides that perfect thermal barrier. Therefore, spray polyurethane foam carries out as an air sealant, where it closes the spaces that would allow the air to escape and add dollars to monthly energy bills. Based on the Environmental Protection Agency’s Energy Star program they estimated that when adding insulation and sealing air leaks, you can save about 20 percent on your monthly bill. Among other roofing and wall insulation, it has the highest R-value per inch. When a system has a higher R-value that simply just means that there is greater insulating power.
Durability
When applying a Spray Polyurethane Foam roofing system it is able to improve a building’s strength and effective lifespan. When SPF is sprayed on to the surface it conforms and adheres to the material, which creates a strong bond to protect the roof. That layer of spray foam is seamless, which can eliminate the ability of water to seep through weak spots. Therefore, if there was to be a flood on your commercial roof where spray polyurethane foam was sprayed, it would be highly resistant to water damage. When spraying the foam in the cavities of the walls it increases the durability of the wall system because of the foam’s ability to conform and adhere to the surface and create a strong bond where it’s sprayed. One of the best qualities that spray foam has, is that it is able to expand and contract with the changing temperature. Roofing contractors would be able to install the SPF in any climate or harsh environment and it will not be at the mercy of the conditions. Thus, guaranteeing a strong and legitimate bond.
Seamless Surface
The way that roofing companies apply SPF is by a liquid through a high-pressure spray gun. When the liquid lands on a surface it ends up expanding, covering the entire roof over a large area. Doing this provides a seamless membrane that fills in the cracks, holes, corners, and crevices along the base of the roof. Because spray foam roofs have no seams, there is a less chance for water to leak through. Spray foam is a solid, seamless barrier that is able to protect your roof from moisture and air.
Environmentally Friendly
Spray Polyurethane Foam is an environmentally friendly alternative to fiber insulation, such as fiberglass or cellulose. Spray foam insulation reduces the impact on the environment by using renewable resources and recycled plastic waste in their foams. Therefore, with the proper maintenance, your roofing contractor would be able to recycle the membrane of your roof whenever the time comes to replace your roof, and recycled materials would be used to create a spray foam. Also, keep in mind that Spray Polyurethane Foam insulation can improve the air quality by creating an impermeable air barrier against pollen, pollutants, and dust. With this, it makes it perfect for people who suffer from allergies, asthma or chemical sensitivity.
The Downside to SPF
We know that there are some great benefits to Spray Polyurethane Foam. However, here’s the downside, some people have poor thoughts on the spray foam because some commercial roofs were installed incorrectly using the foam insulation. This is one of the biggest reasons that there are negative reactions to the spray foam. To get the most benefits out of the Spray Polyurethane Foam roofing system, then your roofing contractor must install it correctly. Hiring a professional, certified roofing contractor would be able to provide your commercial roof with a special product that supply the savings in energy cost that SPF provides and they will reapply the SPF every ten years to ensure its quality. However, many believe that over time, these benefits will slowly disappear in comparison to the Duro Last roofing system. When compared to Duro Last, Duro Last uses a white or grey membrane that reflects the UV rays from the sun without having something additional applied to it.
What is Duro Last?
What makes Duro Last equivalent to SPF? What benefits from Duro Last could potentially outweigh SPF? For starters, Duro Last roofing systems contain the highest quality materials and undergo demanding quality control checks during the manufacturing process. A Duro Last roofing system is a reinforced thermoplastic (PVC) single-ply membrane that would be a perfect fit for your commercial roof or industrial building that has a flat or low slope roof. It is said that the Duro Last roofing system can last longer than the spray polyurethane foam. There are elastomeric coatings for roofs that can be applied and reapplied that can help make the spray foam last longer. When the PVC membrane is used and the ISO insulation is installed underneath the membrane, then Duro Last can last longer than the SPF. The only way that the spray foam can last longer than 20 years is if it is maintained and reapplied correctly. It would have to be recoated every ten years or so and would require a strict maintenance program in order to maintain all of its benefits. Duro Last offers a 15 and 20-year warranty on their products which many building owners prefer.
Prefabrication
With Duro Last, each roof is measured and manufactured to the exact size of the roof, accommodating for every rooftop penetration. When the Duro Last roof is prefabricated in the factory, it eliminates just about up to 80 percent of seaming that would’ve been done on-site during rooftop installation. Which in return improves the long-term performance of the roofing system. It is actually the only roof manufacturing company to offer prefabrication of the entire roofing system. Doing this provides an excellent fit and delivers leak-proof protection. A custom- fabricated Duro Last commercial roofing system is long-lasting and is one of the leaders in roof leak prevention.
Durability
Comparing Duro Last to SPF, the durability is quite similar in the sense that the Duro Last roofing system is resistant to any water damage. Duro Last has a custom flashing that is able to resist any ponding water, or collecting of water, which is very common in a commercial roof. Once the roof is installed, it is virtually maintenance-free, unlike other roofing materials that may require regular maintenance or other repairs. Not only is it resistant to ponding water, but it is also resistant to fire, chemicals, grease, high winds, and punctures. Just like the spray foam, Duro Last can easily accommodate for a wide range of temperatures.
Energy Efficient
The Duro Last roofing system has a white membrane that has the highest reflectivity retention of any single-ply membrane. Which means that you are able to save more money on cooling costs, very similar to Polyurethane Foam. Out of the white, single-ply products rated by the Energy Star program, Duro Last is the only roofing system that has a reflectivity retention of greater than 85 percent after three years of weathering. The sustained reflectivity rate is saving a lot of energy and money for building owners. The Duro Last roofing system is mechanically-attached, and insulation can be placed under the membrane during the installation of the roof, which would reduce the amount of heat loss in the winter.
SPF vs Duro Last: Which is Better?
Spray Polyurethane Foam is more costly than Duro Last because of the installation process. It is as easy as needing a piece of special equipment in order to install the spray foam, even to reapply it, but the special equipment is expensive to use. However, Duro Last is easy and quick to install as well without the required expense of high tech equipment to be used. Many know spray polyurethane foam is sprayed to secure the roof. Duro Last is installed with screws and plates which gives it that air and watertight fit. Duro Last can also be applied over EPDM rubber roofs, TPO single-ply, and metal roofs. It’s also affordable, plus it carries a longer lifespan and more benefits than polyurethane foam does. However, we are going to go against Duro Last a little. The reason being, that polyurethane foam can be applied to surfaces with irregular shapes and penetrations. Another benefit of SPF is that it can be applied over an existing roof, which eliminates the need for the cost of tearing off of an old roof. Sprayed Polyurethane Foam roofing systems are also much lighter than Duro Last. When placing the insulation on the outside, the foam insulation reduces building movement and thermal shock. Spray Polyurethane Foam is one of the best insulators that a building owner can buy. Closed-cell SPF is the only insulating material that does not soak up water. Since SPF is applied to the roof surface, it is recommended for your commercial roof that your qualified roofing contractor assures the material’s integrity.
So is SPF better than Duro Last? Or is it the other way around? The decision comes down to the requirements of your project, your budget, and personal preference. Both roofing systems are high quality products that will ensure the quality and protection of your roof. It is important to sit down with your commercial roofing contractor and discuss the pros and cons of each of these methods to come to the best solution for your commercial roof.
