Metal Roofing Accessories

Find fasteners, anchors, bolts, hardware and more. We are a leading provider of quality fastening products for metal roofing and siding


Flashing and trim available in steel with coordinating finishes and colors for your residential, commercial, industrial or agricultural metal roofing project.


Use sealant tape at the panel laps for metal roofs to increase weather tightness. Order yours today.


Self drilling metal roofing fasteners, rivets, and clips available. All types. Metal to Wood and Metal to Metal. Painted and Galvanized.


High Quality, Natural Illuminating FRP Panels that match our most popular metal roofing profiles. Immediate Availability - 8 OZ White.


Foam closures for metal roofing and metal decking. 7/8" Corrugated, PBR Panel, Western Rib (7.2 Panel). Shop a wide variety of foam closures and foam plugs.


Galvanized square tube in stock in 14 gauge at many different lengths. Galvanized tube used for metal fence posts, metal carports, deck posts, panic bar gates, or building supports.


Metal Purlins and Cee Channel are in stock. Cee Purlins and Zee Purlins. Galvanized and Red Prime Painted. Immediate availability.


Buy Metal Roof Sealant. Available In A Variety Of Colors And Sizes. NovaFlex Construction Silicone Colored Caulk for Metal Roofing Applications.

Western States Metal Roofing - Pipe Flashing on a Metal Roof install Blog

We offer a wide range of pipe flashings in both square and round. Shop now.


Proper metal roof ventilation is essential for a healthy indoor environment. Our ProfileVent ventilation products are an intelligent solution for your roof.


Find high strength moisture protective covering for the underlayment of your metal roof.


All of S-5!’s snow guard retention systems dramatically reduce these risks associated with rooftop avalanches while maintaining the clean lines of the roof. With multiple options to choose from, you can browse our selection of metal roof snow stops to see which product will work the best for your metal roof.


S-5! provides the easiest, most cost-effective way to install solar panels directly to standing seam metal roofs.

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3 Problems With SMP Painted Panels. Should You Consider PVDF Paint?
Lauren Risotto

By: Lauren Risotto on May 4th, 2020

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3 Problems With SMP Painted Panels. Should You Consider PVDF Paint?

Homeowner | Metal | paint systems

When it’s time to pick out a color for your new metal roof, the decision gets slightly more complicated when you also have to choose which kind of paint system, or coating system, you want. While the type of paint might not seem important, it does play a big factor in the longevity of your roof’s appearance.

Download Your How To Choose A Metal Roofing Color Guide

The two most popular coating systems for metal panels are SMP (Silicone Modified Polyester) and PVDF.

Some colors are offered in both systems, so what’s the difference? You may be tempted to choose SMP just because it is the more affordable option. However, the paint system has some downfalls that might not be worth the cost savings.

At Western States Metal Roofing, we manufacture panels in both SMP and PVDF paint systems. We have compared both systems and believe both are excellent products. However, PVDF is a more premium product of superior quality when compared to SMP. This doesn’t mean you should rule out SMP panels, as these panels also provide a great amount of value.

We want to make sure you are aware of any potential shortcomings associated with SMP paint before you make a buying decision.

Here are the three most common problems with SMP paint.

1. SMP Paint Fades Over Time

Fading refers to the roof’s visible loss of color over time. It results directly from the chemical breakdown of a coating’s base resins and pigments. The breakdown happens from factors such as chemicals in the atmosphere, moisture, pollution, and UV rays.

The silicone in the SMP paint helps protect the color from fading. For this reason SMP paint performs better than less expensive polyester paints without any silicone in them. However, the structure of SMP is not strong enough to prevent fading from happening eventually.

The result of fading usually is a much lighter, dull color. However, some colors might turn into a completely different color. The color of the roof might even appear to be uneven.

It’s very possible to have different levels of fading throughout a roof if one side receives greater exposure to the sun. If you choose a red roof, the side that's often in the shade could remain vibrant, while the other side of the roof that’s exposed to the sun could appear dull and old.

While fading does not affect a roof’s performance, it does greatly impact a roof’s appearance. While fading will eventually occur with any type of paint system, SMP painted panels will fade faster than a more expensive option like a PVDF paint system. The fading will be less noticeable with a neutral color such as white, tan, or light stone. If you have a bright and vibrant color, PVDF would be a better option.

How Does Your Climate Impact Fading?

The length of time it takes fading to occur will always vary. However, there are certain climates that will expedite the process.

Areas With High Sun Exposure

Since UV rays cause fading, any area where the sun is shining strong on a regular basis is going to cause SMP roofs to fade faster. For this reason, a black roof in Maine would likely fade slower than a black roof in Florida.

Moisture from salt water will cause a metal roof’s color to have accelerated fading.

Coastal Properties And Moisture

A roof that is close to a coastline will fade faster due to the salt in the atmosphere. Actually, any kind of constant contact with moisture will have an effect on the roof’s pigment. Exposure to moisture such as saltwater, condensation, snow, or rain will cause fading over time.

Extreme Temperatures

An area that experiences extreme temperatures, whether tropical heat or polar vortex type conditions, will cause accelerated fading. The chemical makeup of the paint is also weakened if there are frequent fluctuations in temperature.

2. Chalking

This is when the appearance of a powdery substance forms on the surface of a coating. If you touched the roof’s surface, you would have a white, chalky residue on your fingers. Chalking occurs faster on SMP panels than it does on PVDF painted panels.

Similar to fading, chalking is caused by the breakdown of resins. It’s an undesirable appearance that keeps the roof from looking fresh and new.

While not as many environmental factors contribute to the white residue when compared to fading, climate does take a role in the speed chalking occurs. UV rays from the sun will expedite the chalking process, so areas that are usually sunny will generally see chalking occur more rapidly.

Disguising Chalking

Lighter colored panels, such as certain gray colored metal roofing, make the appearance of chalking less apparent as the chalky substance blends in with the color. The lighter the color, the less noticeable the white residue will be. While it’s not a solution that will prevent chalking from happening, it might make the undesirable powdery appearance less noticeable.

If you are planning on having a dark-colored roof, you may want to avoid using SMP panels. The dark panels will only make the chalking more apparent. For example, chalking will be more noticeable on an Emerald Green roof and less noticeable on a Polar White roof.



Western States Metal Roofing Panel Colors Available In SMP Paint

3. Less Color Options

The third problem with SMP panels is the limited choices in terms of color. There is a much wider availability of colors that come in PVDF paint instead of SMP.

This might not be an issue if you are looking for a basic color. However, specialty colors like metallic or panels that look weathered are going to be done with PVDF coating systems.

For tips on choosing a metal roof color we recommend this article:

Metal Roofing Colors: 5 Tips To Pick The Best Metal Roofing Color

SMP Quality Can Vary

SMP is made of polyester and silicone intermediates. Silicone acts to improve the gloss retention and weather resistance of the coatings. The higher the silicone content, the better the performance of the paint.

The amount of silicone in the coating varies depending on the manufacturer. This means that not all SMP paints are created equal. Some SMP systems are of better quality than others.



When To Use SMP Or PVDF Metal Panels

SMP paint is considered to be “middle of the road” when it comes to roofing paint systems. They are better than polyester paints that do not have the protective silicone, but not nearly as high quality as PVDF.

SMP is a good option for your new roof if:

  • A metal roof’s performance is more important to you than its appearance.
  • You want a more affordable paint system.
  • You want a light-colored roof.

However, you might want to avoid SMP panels if:

  • The appearance of your roof is a top priority.
  • You want a dark-colored roof.
  • You want a bright and vibrant colored roof.
  • You want your roof in a specialty color.
  • You live near water or in a climate with constant moisture.

At Western States Metal Roofing, we offer metal panels in both SMP and PVDF paint systems.

If you have decided that SMP is not the right paint system for your roof, we have a wide selection of PVDF  colors to choose from. Start by taking a look at our available colors in both paint systems to decide which colors you are interested in for your project.

If you would like to learn more about the differences between a PVDF and SMP paint system, we recommend that you read:

Best Paint For My Metal Roof Panels: SMP Paint v PVDF

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About Lauren Risotto

Lauren is the Content Manager at Western States Metal Roofing and provides insight on content creation and product promotions.