Prices for many materials used in door, window and glass manufacturing saw some changes in November, according to the latest producer price index (PPI) from the U.S. Bureau of Labor Statistics (BLS), while the divide between price decreases and increases remains fairly even. Some prices stood the same for several months running.

The monthly PPI for flat glass in the commodity category is down 0.1 percent from the previous month, and fell 0.1 percent compared to November 2017.

In the industry classification for flat glass manufacturing, the index dropped 0.2 percent from October 2018, but is up 5 percent from November 2017. Industry classifications measure “changes in prices received for the industry’s output sold outside the industry (that is, its net output).”

Prices for fabricated, structural metal products dropped 0.1 percent from the previous month, and are up 8.3 percent from November 2017. Ornamental and architectural metal product manufacturing, in the industry category, are up 4.4 percent from October, and 14.8 percent from this time last year.

The PPI for metal door and window manufacturing is up 0.5 percent from October, and 7.3 percent from November 2017’s report.

Prices for wood window units remained the same for the fourth month in a row, but are up 4 percent compared to November 2017. Prices for wood doors for interior and exterior applications also remained the same. They’re up 8.8 percent since last year.

The price of thermoplastic resins and plastic materials fell 2.5 percent in November and is up 1.1 percent from last year. Fiberglass plastic product prices remained the same from the previous month and are 3.4 percent higher for the year.

The cost of builders’ hardware, which includes hardware used in doors and windows, rose 0.2 percent from the previous month. That price is 2.7 percent higher than in October 2017.

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