Prices for many materials used in door, window and glass manufacturing increased slightly in August, 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 2.7 percent from August 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 rose 0.4 percent from July 2018. It’s up 7.1 percent from August 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 grew 0.2 percent from the previous month, and are up 8.2 percent from August 2017. Ornamental and architectural metal product manufacturing, in the industry category, rose 0.3 percent from July, and is up 6.9 percent from this time last year.

The PPI for metal doors and windows rose 3.5 percent from its July level, and is up 11.3 percent from August 2017’s report.

Prices for wood window units remained the same from July to August, and are up 3.9 percent since August 2017. Prices for wood doors for interior and exterior applications also remained the same. They’re up 8.9 percent since last year.

The price of thermoplastic resins and plastic materials fell 0.2 percent in August and is up 5.9 percent from last year. Fiberglass plastic product prices are up 1.2 percent since last month and are 3.7 percent higher for the year.

The cost of builders’ hardware, which includes hardware used in doors and windows, fell 0.2 from the previous month. That price is 2.8 percent higher than in August 2017.

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