Shipments of asphalt shingles and built-up roofing are down for the year through the end of the third quarter, while modified bitumen is up slightly.

The Asphalt Roofing Manufacturers Association released its Quarterly Product Shipment Report on Tuesday. The report covers asphalt roofing product shipments in the U.S. and Canada for the third quarter and year-to-date.

Among other things, the report indicates asphalt shingle shipments through the end of the third quarter was about 113.5 million compared with 120.7 million for the first three quarters of 2017 — a drop of 6 percent. By comparison, numbers were up in the second quarter.

More detailed numbers are in the table below.

“In all of its forms, asphalt roofing is important for a diversity of industries and professions,” said ARMA’s Executive Vice President Reed Hitchcock. “ARMA provides and will continue to provide these reports so that interested members of the public may stay up-to-date on the asphalt roofing industry.”

ARMA is a trade association representing North America’s asphalt roofing manufacturing companies and their raw material suppliers. The association includes the majority of North American manufacturers of asphalt shingles and asphalt low slope roof membrane systems. Information that ARMA gathers on modern asphalt roofing materials and practices is provided to building and code officials, as well as to regulatory agencies and allied trade groups, according to the organization.