The Canadian offshoot of Malvern-based CertainTeed stands to lose a lot of business, unless America’s neighbor to the north follows through on a provisional tariff that adds up to 277 percent more onto the price of drywall imported from the United States.

CertainTeed Gypsum Canada complained in April that U.S. manufacturers were dumping drywall products across the border at as much as half price, according to a Bloomberg report by Katia Dmitrieva.

“No company in Canada can compete against U.S. products dumped at such low price levels,” General Manager Matt Walker said in the article. “We hope that Canada stands firm for free and fair trade and a level playing field.”

CertainTeed has invested in three production facilities and about 200 jobs in Canada, and it’s now the country’s largest maker of drywall.

Meanwhile, the tariff has practically eliminated imports, and the ensuing shortage of product has caused a 30 percent hike in Canadian drywall prices.

Read more about CertainTeed and the bigger U.S.-Canada trade dispute on Bloomberg here, and check out previous VISTA Today coverage of the building materials giant here.