Switching roofing materials sourcing from China to Canada

When roofing materials crosses a US border, where it was made now decides a surprising share of what it costs. China carries roughly 40% in duties and fees against 15% for Canada, a spread worth near $26,375 on $100,000 of annual volume. The importers who win this cycle are the ones treating country of origin as a number to optimise, not a given. Below, each tariff layer is laid out for both origins, with the saving scaled to several order sizes.

How the tariff stacks compare

Both stacks share the same customs valuation, so the comparison is apples to apples. From China, the entry is assessed a 5% Most-Favoured-Nation base duty, a 25% Section 301 surcharge, and a 10% Section 122 reciprocal surcharge on its roofing materials, an effective 40% once the $49.74 in processing fees are added. Sourced from Canada, the goods face a 5% Most-Favoured-Nation base duty, a 10% Section 122 reciprocal surcharge, and a 10% negotiated bilateral rate on its roofing materials, an effective 15% once the $49.74 in processing fees are added. Section 301 does the damage here — 25% levied specifically on China shipments, stacked above the base and special-tariff layers rather than replacing them. Section 122 adds a reciprocal duty that one origin escapes via a bilateral deal — a meaningful but expiring factor in the current gap. The Merchandise Processing Fee and Harbor Maintenance Fee are charged on customs value, not origin, so they sit at $49.74 on either stack and never contribute to the gap. Subtract one stack from the other and $2,637.50 per $10,000 shipment separates the two origins. A $25,000 order therefore differs by about $6,594, and a $100,000 year by roughly $26,375. A buyer placing $25,000 orders sees about $6,594 of avoidable duty on each one.

Trade context

Classified in HTS chapter 6811, 6901, 7210, roofing materials spans products like Asphalt shingles, Metal roofing panels, Clay tiles, and Concrete tiles. Because roofing materials moves in volume, even a modest per-unit duty gap aggregates into a number that decides sourcing strategy. From Asia-Pacific, China's top US-bound categories include consumer electronics, computers servers, and clothing garments. Absent a trade deal, China's roofing materials is assessed standard duties and whatever surcharges apply. From North America, Canada's top US-bound categories include crude oil petroleum, passenger vehicles, and lumber wood products. Under USMCA, Canada-origin roofing materials that meets the rules of origin can clear duty-free entirely — a decisive edge where qualification holds. Spanning Asia-Pacific and North America, the two lanes differ in freight and transit, so weigh those against the duty saving. A switch to Canada still hinges on capacity, certification and lead time, but the duty advantage is the part that is already quantified. US tariff policy in 2026 is unusually fluid, with effective rates on many categories changing several times a year — a reason to treat any origin comparison as a live calculation rather than a fixed sheet.

Recommendation

For $100,000 a year of roofing materials, the move from China to Canada is worth about $26,375, scaling to $13,188 at $50,000, $65,938 at $250,000, and $263,750 at $1,000,000. These are engine-computed stacks, not estimates: identical inputs on both sides except country of origin, so the gap is purely a duty result. These figures reflect tariff and fee savings only, assuming equal product cost — your actual landed cost also depends on price and freight, which vary by supplier. Treat the annual saving as the ceiling on switching cost: as long as moving to Canada costs less than that, the change is accretive. Request parallel quotes from your China incumbent and a vetted Canada source, then compare landed cost with the duty gap held constant. The saving is current today; given the pace of 2026 revisions, verify it again at contract signing. Run your own volume — and a post-Section-122 view — through the interactive Tariff Savings Finder. One origin still carries the Section 122 surcharge, due to expire mid-2026; the ranking can shift once it lapses.