"Made in the USA" Roofing: What the Label Really Means
Quick answer
"Made in the USA" roofing is governed by the FTC's "all or virtually all" standard — but a roof is a system (panels, underlayment, fasteners, trim), and the claim often covers only the parts a company manufactures, usually the panels. An imported accessory doesn't automatically make a panel claim false, so the smart move is to ask which parts of your roof the claim actually covers.
What does "Made in the USA" actually require?
In the United States, the "Made in USA" claim is governed by the Federal Trade Commission, and the standard is "all or virtually all" made in the U.S.: final assembly or processing happens domestically, and all — or virtually all — of the product's significant parts, processing, and labor are of U.S. origin, with only negligible foreign content. There are also perfectly legal qualified claims that mean different things: "Assembled in the USA" (put together here, may use imported parts), "Made in the USA with domestic and imported materials," and "Designed in the USA." So the badge alone does not tell you which kind of claim it is — or which parts of your roof it covers.
Panels vs. a system: the distinction that changes everything
Here is the nuance most homeowners miss. A roof is not one object — it is a system of parts: the metal panels, the underlayment beneath them, the fasteners and clips, and the flashing and trim. When a metal-roofing company says "Made in the USA," that claim almost always attaches to the product they actually manufacture: the panels. The underlayment — the waterproof membrane under the metal — is frequently a separate product from a specialist maker, and a great deal of it is imported no matter whose brand is on it. So a company can proudly claim American-made panels while the membrane, fasteners, and trim come from elsewhere. That is not the same as a lie — but it is not the whole story the badge implies, either.
Is one imported component a red flag?
Not automatically — it depends entirely on what the claim covers. If a company manufactures its panels domestically and claims so, importing a separate accessory like underlayment does not by itself make the panel claim false; they are two different products. Where a genuine question arises is when a company markets a complete roofing system or "kit" as Made in the USA while a meaningful part of that system — say, the underlayment — is imported. When the badge is put on the whole package but significant components are foreign, that can cross into deceptive-claim territory, and it is the kind of thing the FTC evaluates. The point for a shopper is simple: don't assume the worst from one data point, and don't take the slogan at face value either. Ask.
The questions to ask any roofing manufacturer
You do not need to be an expert — just ask about the whole system, not only the metal, and expect documented answers. Where is the raw metal coil milled? Where are the panels formed, stamped, and finished? Where is the coating applied? Where is the underlayment made — the component buyers most often forget, and where imported content most often hides? Where do the fasteners, clips, flashing, and trim come from? Does your origin claim cover the panels only, or the complete system — and is it "made in," "assembled in," or "made with domestic and imported materials"? Can you provide country-of-origin documentation for each component? And who backs the warranty, and where will claims be handled decades from now? A manufacturer proud of its sourcing answers all of these plainly and in writing.
Why where your roof is made actually matters
This is not only about patriotism. Domestic and North American manufacturing tends to mean tighter quality control, clearer accountability, more reliable warranty support, and a shorter, more resilient supply chain — plus manufacturing to recognized North American standards and independent testing. When a roof is meant to last 50 years, knowing who made each part of it, and who stands behind it, is not a minor detail. It is the difference between a slogan and a system you can verify.
Interlock's answer: transparency you can verify
We hold ourselves to the same questions we have just told you to ask. Interlock manufactures its aluminum roofing in its own facility in Delta, British Columbia — proudly North American made, in a plant we operate, not a name on someone else's product. Our panels are formed from heavy-gauge, aircraft-grade aluminum (3105-H24 and 3003-H24 alloys) and finished with our Alunar 70% PVDF coating. The system is independently tested and certified — UL 2218 Class 4 for hail, Class A fire resistance, and building-code evaluation reports — and it is backed by a North American company and a transferable Guardian lifetime warranty you can actually call on decades from now. And we answer the whole-system question, not just the metal: ask us where every part of your roof comes from — panels, underlayment, fasteners, and trim — and we will put it in writing. Transparency you can verify is the whole point.
Frequently Asked Questions
Does "Made in the USA" mean every part of the roof is American-made?
Not necessarily. The claim usually attaches to the product the company manufactures — typically the metal panels — not automatically the whole roofing system. Underlayment, fasteners, and trim are often separate products and may be imported. The FTC standard is "all or virtually all," so ask specifically whether the claim covers the panels only or the complete system.
Is imported underlayment a problem if the panels are American-made?
Not by itself. Underlayment is usually a separate product from the panels, and importing it does not make a panel-specific "Made in USA" claim false. It only becomes a genuine issue if a company markets the entire system as American-made while significant components are imported. The way to know is to ask where the underlayment — and every other component — is made.
What should I ask to verify a roof's origin?
Ask about the whole system: where the metal coil is milled, where the panels are formed and finished, where the coating is applied, where the underlayment is made, and where the fasteners and trim come from — plus what the origin claim specifically covers and who backs the warranty. Request country-of-origin documentation. Clear, written answers are the sign of a transparent manufacturer.
Where is Interlock roofing made?
Interlock manufactures its aluminum roofing in its own facility in Delta, British Columbia — proudly North American made. The panels use aircraft-grade aluminum and an Alunar 70% PVDF finish, carry independent UL 2218 Class 4 and Class A fire certifications, and are backed by a North American company and a transferable lifetime warranty. Ask us about the origin of any component and we will answer in writing.
Sources
- Federal Trade Commission — The FTC "Made in USA" standard
- Metal Construction Association — Metal roofing systems and components
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Last reviewed 2026-07-13 · Reviewed by Scott Plumptree, Director of Marketing