Amarr Garage Doors laid off 19 manufacturing employees this week in Lawrence, citing a seasonal downturn in residential and commercial construction nationwide.

The layoffs affected full-time workers on all three shifts at the manufacturing plant at the southeastern edge of Lawrence, at 3800 Greenway Circle in the East Hills Business Park. Most of the affected employees learned of the layoffs Tuesday, but some had been notified late Monday.

“Obviously, we’re tied to the construction market, and the construction sector,” said Delbert Phlipot, vice president for manufacturing at Amarr, which is based in Winston-Salem, N.C. “Construction usually slows in the winter months.”

The company still has about 480 employees working at the 411,000-square-foot plant, which produces garage doors that are sold through more than 3,000 independent dealers and some major retailers, including Costco and — under private labels — Sears and Lowe’s Home Improvement Centers.

The company also made a handful of seasonal layoffs at a smaller manufacturing center in Mocksville, N.C., Phlipot said.

“We don’t anticipate any future reductions,” said Scott Carpenter, an Amarr spokesman.

Affected workers have not been offered severance packages or outplacement services, Phlipot said, although there could be potential for rehiring some displaced workers when and if construction activity picks back up.