Index lookup · WPU0811
Producer Price Index for softwood lumber, the structural framing grade tracked separately from WPU0812 (Hardwood Lumber) and narrower than WPU081 (Lumber). Index base: 1982 = 100.
Latest value is 1 month old. Next update expected around Sep 2026.
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Enter a base value, a current value, and a contract amount to see the adjustment.
Strongest average month-over-month move historically: February (+2.7% avg).
Residential and light commercial framing contracts name this series specifically rather than the blended lumber aggregate, since softwood is the grade actually framed with and its price swings, driven by housing starts and tariff cycles, run wider than the blended series shows.
A starting point citing this series by name and code. Replace the bracketed terms with your contract's actual scope before use.
The [affected portion] of the Contract Price shall be adjusted using US PPI — Softwood Lumber (BLS series WPU0811), published by BLS. Base Period: the index value published for August 2026 (or the month of contract signing, if different) is the Base Value. Adjustment: at each Adjustment Date, the Current Value is the most recently published three-month average of the index (the Averaging Window). The Escalation Factor equals Current Value divided by Base Value. Cap: the Escalation Factor applied under this clause shall not exceed 1.10 or fall below 0.90 (a 10% cap and floor) in any single Adjustment Date, regardless of the index's actual movement. [Replace bracketed terms with your contract's actual affected-portion definition and adjustment-date schedule before use. This is a drafting starting point, not legal advice.]
Want this in a spreadsheet instead? Use =ESCALAKE("wpu0811") in Google Sheets →
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A lumber PPI escalation clause compares a current-period Producer Price Index value for the softwood lumber series to the value at contract signing (the base period), turns that into a ratio, then applies the ratio to the contract price or affected line items. Clauses typically name the exact BLS series code, an averaging window, a publication lag, and a cap limiting the maximum adjustment.
Read more →Escalake tracks US PPI — Softwood Lumber, applies your formula, and gives both sides a number they can confirm, no spreadsheet required.
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