Yes. The US has previously initiated antidumping and countervailing duty investigations on gypsum wallboard from certain countries. Importers should check the current status of any orders with the US International Trade Commission and US Customs and Border Protection before sourcing, as duty deposit requirements and scope rulings can significantly affect landed cost.

Synthetic gypsum, produced as a byproduct of flue-gas desulfurization at coal-fired power plants, has supplied a substantial share of US wallboard manufacturing capacity. As coal plant retirements reduce synthetic gypsum availability, manufacturers may need to increase reliance on mined natural gypsum—either domestic or imported—which could shift trade flows and create sourcing opportunities for importers of raw gypsum rock.