PPI: Material Prices Rise for All but Glass and Plastic

The latest Producer Price Index (PPI) from the U.S. Bureau of Labor Statistics (BLS) shows prices for materials used in door and window manufacturing rising, not only from June to July, but on a year-over-year basis.

In July, the monthly PPI for flat glass in the commodity category showed no change from the previous month, while notching up 3.9% compared to the previous year. Softwood lumber showed significantly more change, with an 8.2% increase from June to July and a 15% rise over July 2025. According to 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 split the ticket with a 0.6% slide from June, but a 2.4% increase on a year-over-year basis. The industry classification measures “changes in prices received for the industry’s output sold outside the industry (that is, its net output).”

The PPI for metal windows increased—by just 0.3% from June, clocking in at 15.7% over the July 2025 report. Prices for metal doors and frames stagnated from the previous month but improved by 9.5% since last year. Prices for wood window units notched increases across the board, up 2.8% monthly, while up 4.4% on a year-over-year basis. Prices for wood doors for interior and exterior applications showed no change from June, but did record an increase of 4.2% over July 2025 pricing.

On the raw materials side, the price for thermoplastic resins and plastic materials slid by 6.8% from June, but saw an increase of 10.1% from July of last year, while prices for fiberglass plastic products flatlined from the previous month but had an increase of 3.6% over the previous July.

The cost of builders’ hardware, which includes hardware used in doors and windows rose by 2.8% from June to July, up 4.9% from July 2025.