KEY POINTS
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The United States began collecting additional 50% duties on selected Canadian goods at 12:01 a.m. Eastern time Aug. 22 after trade negotiations fell apart.
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Covered construction-related products include cement, paint, plywood and fiber cable. Separate measures continue to affect steel, aluminum, copper, lumber and other products.
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Canada suspended negotiations and plans dollar-for-dollar counter-tariffs beginning Sept. 8, with details to follow.
The United States began enforcing additional 50% tariffs on selected Canadian goods Aug. 22 after trade talks failed to produce an agreement before a three-day negotiating delay expired.
The duties apply to Canadian imports covered by three July proclamations addressing alcoholic beverages, dairy products, motor vehicles and auto parts. The White House said the action covers nearly $20 billion in goods. Canadian Prime Minister Mark Carney put the value at roughly $28 billion.
The tariffs apply even when covered goods qualify for preferential treatment under the United States-Mexico-Canada Agreement, or USMCA. The White House excluded energy, potash, fish, critical minerals and goods already subject to Section 232 tariffs from the Section 338 action.
Three-Day Delay Ends Without Agreement
The White House proclamation issued Aug. 18 moved the effective date from Aug. 19 to Aug. 22. It suspended collection during the negotiating period but did not cancel the duties.
Carney said late changes to the U.S. proposal were unfair and uneconomic. He said Canada had offered to remove remaining retaliatory tariffs on steel, aluminum and autos if the United States substantially reduced its duties. Canada also offered to encourage provinces to return U.S. alcohol products to store shelves.
Canada suspended negotiations after the duties took effect. Carney said Ottawa will match the new tariffs dollar for dollar, targeting steel, dairy, appliances, agricultural equipment, pulp and paper, and electronics. The measures are scheduled to begin Sept. 8, the Tuesday after Labor Day.
Construction Exposure Centers on Materials and Classification
The new duties cover several construction-related products. An analysis by the Associated General Contractors of America lists cement, paint, plywood and fiber cable among the affected Canadian goods.
Canada accounted for 22% of U.S. cement import sources from 2020 through 2023, according to the U.S. Geological Survey. Because cement is costly to transport, changes in Canadian supply economics may have the greatest effect in border states and markets connected to Canadian terminals.
The effect on a project will depend on the product’s Harmonized Tariff Schedule classification, country of origin, entry date and applicable tariff programs. Estimators and procurement teams should not apply a single 50% rate to all Canadian materials. The final tariff schedule had not been released Aug. 22.
The Section 338 duties also do not replace other trade measures. AGC lists separate tariffs affecting steel, aluminum, copper, lumber and related products, creating different rates, exemptions and documentation requirements across materials.
Note: Because of the complexity of tariffs, and the evolving trade situation, obtaining advice from a qualified professional is encouraged.
Planning Risk Extends
Canada’s response could affect U.S. building product manufacturers and distributors selling steel products, electrical equipment, appliances, agricultural machinery and paper-based products into Canada.
Our northern neighbor's response in the escalation could also drive supplier substitutions and regional price variations.
The tariff escalation adds uncertainty to the North American trade framework. The Office of the U.S. Trade Representative said July 1 that the United States would "not renew USMCA in its current form", although the agreement remains in force pending resolution or termination.
The next immediate milestone is Sept. 8, when Canada’s counter-tariffs are scheduled to begin. Until product lists and implementation details are published, cross-border material pricing will remain difficult to anticipate with accuracy.
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