Apogee Enterprises Inc. announced its 2015 fiscal year fourth quarter results this week, and according to the company, its revenues were up 15 percent in the quarter and 21 percent over the year.

Apogee also reported that its backlog sits at $491 million—a 49-percent increase over the prior year.

“We built our backlog significantly during the year, giving us momentum moving into fiscal 2016,” says CEO Joseph Puishys. “We expect fiscal 2016 will continue our trend of double-digit, top-line growth and very strong bottom-line growth.”

The company’s architectural glass segment, which is comprised of Viracon, recorded revenues of $92.3 million, up 22 percent. Operating income grew to $4.5 million, and operating margin expanded 480 basis points to 4.9 percent.

“As the U.S. non-residential construction sector strengthened, the architectural glass segment benefitted from operating leverage on volume growth, and improved pricing and productivity, somewhat offset by costs to restart the Utah factory,” a release from the company reads.

Apogee’s architectural services segment consists of Harmon Inc., which saw “flat” revenues of $63.5 million. The company’s architectural framing systems segment is comprised of Wausau Window and Wall Systems, Tubelite, Alumicor and Linetec. That sector saw revenues of $77 million, up 22 percent.

“We are confident that Apogee will again achieve strong growth in fiscal 2016,” said Puishys. “… Our architectural markets are expected to again grow in the mid-double digits in fiscal 2016, and we continue to have robust bidding and award activity,” he said. “Together, these factors give us continued confidence in sustained growth for Apogee.”