Prices for materials used in the glass and glazing industry edged up in September, according to recently released Producer Price Index (PPI) data from the Bureau of Labor Statistics (BLS).

The monthly PPI for flat glass in the commodity category increased a slight 0.1 percent in September and was unchanged the month before. Prices are just 0.2 percent higher than a year ago. According to the BLS, the commodity classification “organizes products and services by similarity or material composition, regardless of the industry classification of the producing establishment.”

The index for flat glass manufacturing in the industry classification was unchanged from the prior month, and those prices have increased 0.6 percent since September 2016. The industry classification measures “changes in prices received for the industry’s output sold outside the industry (that is, its net output).”

Prices for fabricated structural metal products were up 0.3 percent from August to September, following an identical increase the month before. That index, in the commodity grouping, represents a 1.8-percent price increase year-over-year.

Ornamental and architectural metal product manufacturing, in the industry category, saw price increases of 0.3 percent for the month and 2.8 percent for the year.

The PPI for metal windows ticked down 0.1 percent from its August reading (2.7 percent above 2016’s levels), and metal doors and frames also dropped 0.1 percent (up 4.7 percent from last year).

The cost of builders’ hardware, which includes hardware used in doors and windows, was up 1.7 percent in September from the previous month and up 3.7 percent for the year.