Prices for many materials used in glass and glazing manufacturing were a mixed bag in November but all are up for the year, according to the latest Producer Price Index (PPI) from the U.S. Bureau of Labor Statistics (BLS).

The monthly PPI for flat glass in the commodity category dropped 0.1 percent from the previous month, but is up 2.2 percent from November 2017. 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 fell 0.2 percent from October 2018, after a decrease in September. It’s up 5 percent from November 2017. 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 fell 0.1 percent from the previous month after an increase in October. That index, in the commodity grouping, is up 8.3 percent for the year. Ornamental and architectural metal product manufacturing, in the industry category, jumped 3.8 percent in November after no change from September to October 2018. It has experienced a 14.3-percent increase since November 2017.

The PPI for metal windows rose 1.4 percent from its October level. That’s up 11.2 percent from the November 2017 report. Metal doors and frames are up 0.1 percent from October, but the category is up 6.9 percent for the year.

The cost of builders’ hardware, which includes hardware used in glass and glazing, rose 0.2 percent in November after a slight drop in October. That price is 2.6 percent higher than in November 2017.