Market Notes: Lumber Is Up Sharply, and the Duty Rate Is Not the Number You Read

Softwood lumber has moved a long way in a year, and the trade case behind it is being reported with a single tidy percentage that does not exist. Here is what the federal data actually says, which notices it comes from, and the one line on a roofing quote where it shows up.

What moved

Two softwood lumber series published by the Bureau of Labor Statistics moved sharply over the past year. These are producer price indexes: they track what mills receive, not what a contractor charges you.

Bureau of Labor Statistics seriesJuly 2026Twelve months
Softwood lumber300.61415.0%
Softwood lumber, not edge worked156.55717.3%

An index level on its own means nothing to you. The change does. The Bureau of Labor Statistics puts the softwood lumber index at 300.614 for July 2026, which is 15.0% above where it sat twelve months earlier, and the rougher, less processed series moved further still at 17.3%. Both are the agency's not-seasonally-adjusted commodity series, read from its own public data.

Two things follow. Lumber that arrives on a job site this autumn cost the supplier meaningfully more than the same lumber a year ago, and the increase is larger for the least processed material, which is the sort that ends up as sheathing and framing rather than as finished trim.

The trade case, and the number nobody can give you

The reason you are reading about lumber at all is a trade case, and it is being reported with a single tidy percentage that does not exist.

The Federal Register carries the actual notices. The Department of Commerce published amended final results of a countervailing duty expedited review, together with a reinstatement of the order, in August of 2026, and it published preliminary results of both the antidumping and the countervailing duty administrative reviews for the 2024 period in April. Those are the documents. Everything else you will read this week is somebody's summary of them.

Here is what this page will not do: give you a duty rate. We could not source one rate that applies to every shipment, because these duties are set per exporter and revised in periodic administrative reviews, and several of the 2026 results are still preliminary rather than final. A headline percentage is almost always one row of a table treated as the whole table.

If a supplier tells you their price moved because of duties, the answerable question is which exporter supplied the wood and which review period applies to it. That is a question with a document behind it. "Tariffs went up" is not.

Where it lands on a quote

On a roofing quote, lumber is usually not the shingle line. It is the line that appears when the tear-off exposes something bad.

Almost every roofing bid carries a deck repair allowance: a stated quantity of sheathing to be replaced if the old boards are soft, priced per sheet or per square foot. Most homeowners skim past it because it reads as a small contingency. When lumber moves the way these indexes moved, that allowance is the line on the page that moved with it, and it is also the line most likely to be quietly repriced on the day the roof is opened.

The same applies to framing work behind a window replacement. A full-frame replacement that finds rot at the sill turns into a carpentry job, and carpentry jobs buy lumber.

None of this makes a higher bid wrong. It makes the bid checkable. A contractor who can tell you the per-sheet price, the number of sheets assumed, and what happens beyond that count is quoting from something. A contractor who has raised a lump sum and pointed at the news is not.

What this does not tell you

A producer price index is not a retail price and it is not your bid. It measures what producers receive at a point in the supply chain that sits well upstream of a lumberyard invoice, and it carries no information about your market, your supplier's contracts, or what a roofing company pays for a unit of sheathing this week.

It also says nothing about the other materials on a roofing quote. Shingles, underlayment, and metal edge are different commodities with their own indexes, and they do not have to move together. A supplier who raises everything and blames lumber is telling you about their pricing policy, not about lumber.

And an index that rose can fall. This page reports where the Bureau of Labor Statistics series stood in July 2026, not where it is going.

What to ask

Three questions, and each has a document behind it.

  1. What is the deck repair allowance, priced per sheet or per square foot, and how many are included before it becomes an extra? Ask for the number and the unit price separately.
  2. If material cost is the stated reason for an increase, which material, and by how much? Lumber, shingles and metal move independently. A single percentage applied to the whole bid is not a material cost explanation.
  3. Who supplied the wood, and under which review period? Only worth asking if a supplier cites duties by name, but it turns a slogan into a checkable fact.

Related on this site

Other pages on this site that take a quote apart the same way:

Sources and method

  • Producer Price Index — U.S. Bureau of Labor Statistics, Producer Price Index, commodity series read from the agency's own public API. Softwood lumber is series WPU0811 and softwood lumber, not edge worked, is series WPU081106, both not seasonally adjusted. The index measures what producers receive, not what a contractor charges you. bls.gov/ppi
  • Softwood lumber trade proceedings — U.S. Department of Commerce notices published in the Federal Register: the amended final results of a countervailing duty expedited review and reinstatement of the order (6 August 2026), and the preliminary results of the antidumping and countervailing duty administrative reviews for 2024 (both 14 April 2026). Figures read from the publisher on 1 September 2026. federalregister.gov
  • The duty rate on a specific shipment — We could not source one duty rate that applies to all Canadian softwood lumber. Antidumping and countervailing duties are set per exporter and revised in periodic administrative reviews, and several of the 2026 results are still preliminary. A single headline percentage is almost always somebody's simplification of a table. Read the notice for the exporter that actually supplied the wood.

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