As Congress returns to Washington, the National Lumber and Building Material Dealers Association (NLBMDA) is urging congressional leaders and the Administration to address growing cost and supply pressures stemming from recently implemented Section 338 tariffs on Canadian building materials. In a letter sent Monday to Mike Johnson, Hakeem Jeffries, John Thune and Chuck Schumer, NLBMDA urged for targeted relief for essential building materials where domestic production is insufficient to meet US demand. NLBMDA also called for greater stability and predictability in the US-Canada trade relationship, citing the highly integrated nature of the North American building materials supply chain. …In a recent member survey, 80% of respondents reported sourcing or availability impacts, while nearly 87% reported higher supplier prices. Dealers also cited reduced shipments from Canadian suppliers, longer lead times and difficulty identifying domestic alternatives that can readily meet demand. …NLBMDA also highlighted the broader uncertainty created by sudden changes in tariff policy.