The biggest U.S. homebuilders group urged the Biden administration to help increase lumber supply, saying record-high costs threaten to price potential home buyers out of the market and curb construction. The administration needs to remove import tariffs on Canadian lumber and urge producers to boost output, the National Association of Home Builders said Friday on its website. In November, the U.S. Department of Commerce reduced its duties on Canadian softwood lumber by more than half to 9%.  The association’s request comes as U.S. lumber prices soar to levels never seen before, stoking ...