| Index | Wt | YoY | Trend |
|---|
Material Weight Breakdown — Drywall
Each weight represents the estimated portion of material costs for this trade, mapped to the closest available PPI index:
| Weight | Component | Tracked Via |
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How We Calculate Escalation
Data Sources: Both come from the U.S. Bureau of Labor Statistics — materials from the Producer Price Index commodity series listed above, labor from Current Employment Statistics series CES2000000003.
Weighted Material Index:
Escalation Formulas:
Combined:
Limitations:
- PPI indices are national averages — regional pricing varies
- Not all materials have specific indices (proxies noted above)
- Past trends don't guarantee future performance
- Labor data is construction-wide, not trade-specific
- Weights are estimates based on typical projects
Formula Reference
What these indexes are, and what they are not
The seven material figures are U.S. Bureau of Labor Statistics producer price indexes, retrieved from the BLS public data API and listed by series ID so any of them can be checked: lumber WPU081, iron and steel WPU101, concrete products WPU133, gypsum products WPU137, prepared paint WPU0621, insulation materials WPU1392, copper wire and cable WPU10260314. Labor is BLS Current Employment Statistics series CES2000000003, average hourly earnings of all employees in construction. Everything here is the June 2026 data, retrieved on 31 July 2026; the indexes are published monthly and are subject to revision after first release.
A producer price index tracks prices at the producer's end of the chain. It is not the number on your invoice โ it carries no freight, no distributor's margin, no regional difference, no quantity break and none of your negotiated terms. The index levels are not comparable to one another either, because they sit on different base periods: copper wire and cable runs from December 1986 = 100 while most of the others run from 1982 = 100. The rate of change is the only figure worth reading across materials, which is why that is all this page uses them for.
Why one industry-wide number is the wrong number
In the twelve months to June 2026 the spread between commodities was enormous. Copper wire and cable rose 22.3 per cent and iron and steel 14.2 per cent. Prepared paint rose 6.2 per cent, lumber 5.1, concrete products 3.2. Insulation materials moved 0.6 per cent, and gypsum products actually fell, by 0.7. Average hourly earnings in construction rose 4.3 per cent.
An electrical package and a drywall package in the same building, priced on the same day and held for the same six months, are therefore not carrying the same risk โ and neither of them looks much like a national all-materials average. That is the entire argument for choosing a trade before reading a number off any cost index, including this one.
The weights are yours, not ours
Each trade preset carries a material mix and a material-to-labor split, and both are this page's assumptions rather than published data. They are starting points shaped by what the trade visibly buys โ drywall at 60 per cent gypsum, 30 steel, 10 insulation; painting at 100 per cent paint โ and the sliders exist precisely because your mix will not be ours. The split usually matters more than the mix: painting is set at 70 per cent labor, so a lumber spike barely reaches it, and moving that one slider will change your answer more than any material weight does.
Two mappings are frank proxies. There is no producer price index for acoustical ceiling tile, so the ceiling preset tracks tile against gypsum products and grid against iron and steel. The methodology panel names the proxy on the line where it is used, and a proxy is worth exactly what the underlying correlation is worth โ which for a mineral-fibre tile against gypsum board is a reasonable guess and nothing more.
Where the long-run rate comes from
The conservative scenario pulls the recent trend halfway back toward a long-run rate, on the argument that twelve unusual months rarely repeat twice. That long-run rate is the compound annual change in the BLS special index for construction materials, series WPUSI012011, from June 2006 to June 2026: 180.7 to 369.26, which works out at 3.6 per cent a year over twenty years that contained both the 2008โ09 collapse and the 2021โ22 spike.
What an escalation allowance is not
It is not a forecast. A producer price index records what has already happened; nothing in it knows about a tariff announced next quarter, a mill outage, or the supplier who has quietly already given you a price. It is national, so a regional shortage is invisible to it. It applies one annual rate across the whole horizon without compounding. And it says nothing at all about who carries the risk โ that depends on your escalation clause, on how long your supplier will actually hold a price in writing, and on how long your subcontractors will stand behind theirs. Use this to size an allowance and to argue for a clause. Anything that genuinely holds a price โ a quote, a subcontract, a purchase order โ beats an index every time.
Frequently asked questions
Take an annual rate of change for the things the job actually buys, divide it by twelve, and multiply by the number of months between the price you are holding and the month the money is spent. Weight materials and labor by their share of your cost, because a trade that is seventy per cent labor barely feels a lumber spike. The published index only tells you what producers charged in the past; it is not a forecast, and it is a national figure, so treat the result as a starting allowance and confirm it with quotes and a subcontractor's own escalation terms before it goes in a bid.
There is no single rate, which is why any one number you are quoted is probably the wrong one for your trade. In the twelve months to June 2026 the Bureau of Labor Statistics producer price indexes moved very differently by commodity: copper wire and cable rose 22.3 per cent and iron and steel 14.2 per cent, while gypsum products fell 0.7 per cent and insulation materials rose 0.6 per cent. Average hourly earnings in construction rose 4.3 per cent over the same period. An electrical package and a drywall package in the same building therefore face quite different escalation, and both differ from a national all-materials average.
This one is, and it needs no account. It runs entirely in your browser on published federal data, and nothing you type is sent anywhere. The trade-off is honest to state: it carries national indexes, not your region, not your supplier and not your negotiated terms, so it produces a starting allowance rather than a price. Anything holding a price for you โ a quote, a subcontract, a purchase order โ beats an index every time.
All figures on this page come from the U.S. Bureau of Labor Statistics and were retrieved from its public data API on 31 July 2026, using the June 2026 release. Materials are Producer Price Index commodity series WPU081, WPU101, WPU133, WPU137, WPU0621, WPU1392 and WPU10260314, plus the construction-materials special index WPUSI012011 for the twenty-year rate; labor is Current Employment Statistics series CES2000000003, seasonally adjusted. The trade material mixes and material-to-labor splits are this page's own assumptions, offered as editable starting points rather than as published data, and are flagged as such wherever they appear.