PVDF vs SMP: What to Tell Your Customers at the Kitchen Table

Homeowners cannot see gauge, clips or underlayment, but they can see color, and color is where the paint system conversation starts. PVDF and SMP are the two paint systems on nearly every painted steel and aluminum roof panel sold in the United States, and the difference between them is the difference between how the roof looks in year two and how it looks in year twenty. Here is how to explain it at the kitchen table in plain words, and how to walk a customer through a finish warranty without overselling it.

The two systems in one sentence each

PVDF, sold under the Kynar 500 and Hylar 5000 resin names, is a premium coating made with 70 percent polyvinylidene fluoride resin. It holds color and gloss longer and resists chalking better than anything else commonly applied to roofing coil. SMP, silicone-modified polyester, is the economy and mid-grade system. It is a harder, more scratch-resistant film with good performance in light colors, and it fades and chalks sooner than PVDF in dark and bright colors.

Both go on over a pretreatment and primer, on Galvalume or G90 galvanized steel or on aluminum. Both are good products. The honest message is not that one is good and one is bad. It is that they are built for different jobs and warranted differently.

The kitchen table script

Try something close to this, in your own words:

There are two grades of paint on metal roofs. The standard grade is a tough paint that does fine in light colors and on buildings where a little fading over the years will not bother anyone. The premium grade is the paint used on commercial buildings and on dark or bright colors, because it holds its color far longer. Your roof will last for decades either way. The paint grade decides how it looks along the way, and what the manufacturer will stand behind.

Then show them two samples of the same color, one in each system, and let them hold them. Most people decide quickly once they understand that the price difference is in the paint, not in the metal under it.

Reading a finish warranty with a customer

A finish warranty is a separate document from the substrate warranty and from your workmanship warranty, and customers mix them up constantly. Walk through three things:

• Term. PVDF finish warranties commonly run 30 to 40 years. SMP finish warranties commonly run 25 to 40 years. The headline number is not the whole story.
• What is covered. Film integrity, meaning peeling, cracking and blistering, is usually covered for the full term. Chalk and fade are covered to a numeric threshold, and those thresholds are often looser for SMP or run for a shorter period. Read the chalk and fade lines out loud.
• What is excluded. Finish warranties on steel generally exclude installations within a stated distance of salt water, unless the panel is aluminum. They also exclude damage from chemicals, standing water, scratches and improper storage or installation. Your workmanship warranty, not the paint maker, covers your installation.

Hand the customer the actual warranty document for the actual panel, not a brochure. If the panel is coming from a fabricator or distributor, confirm who issues the warranty and whether it needs to be registered. Our guide to metal roof warranties is written for homeowners, and you are welcome to send it to them before the meeting.

Which system for which job

Mistakes that cost you later

• Saying lifetime. No paint warranty is lifetime, and the word invites a claim you cannot honor.
• Saying it will never fade. Every finish fades. The warranty defines how much and over what period.
• Mixing systems on one roof. SMP trim on PVDF panels, or the reverse, fades at different rates and the roof looks two-toned in a decade.
• Ordering trim coil from a different supplier than the panels without matching the paint system and the color standard.
• Promising a color match to an existing roof or to a sample card without a physical chip from the coil run.
• Skipping the warranty registration if the manufacturer requires one.

One more thing to say

Tell the customer that the paint system is one of three decisions that set the roof’s look over time, alongside color and the panel profile. Our guides to metal roof colors and PVDF vs SMP cover both in homeowner language. A customer who understands the choice is a customer who does not call you in year eight asking why the roof does not look the way the brochure did. That conversation takes ten minutes at the table and saves you a day later.