As the dust settles in this tit-for-tat tariff row, what will be affected most on both sides of the border? …Construction materials such as steel, aluminium as well as lumber wood have had tariffs in place before the latest escalation, though Canada has now matched US rates on the metals at 50%. Carney has also imposed import taxes on several US wood products, such as plywood, and even screws used to fix timber together. That means building firms that import such materials will face higher costs and may choose to pass those on through higher prices – pushing up the cost of homes, for example. The Forest Products Association of Canada says tariffs would “raise costs on both sides of the border”, while on the US side, Bill Owens, chairman of the National Association of Home Builders (NAHB) urged Trump to make building materials exempt from his tariff agenda due to an “ongoing housing affordability crisis”.