Millwork (U.S.) — NAICS 32191 Industry Primer

NAICS 2022 code 32191 — Millwork. The North American Industry Classification System (NAICS) is the federal scheme that sorts businesses by what they make; this five-digit "industry" groups three related child industries that all cut, shape, and finish wood into parts for buildings: wood windows and doors, other millwork including flooring, and the cut-stock/resawing/planing step that feeds them.

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1. Overview

Millwork is the trade name for worked wood products used in construction — the fabricated wood you see once a building is finished: windows, doors, mouldings, trim, stairs, and wood flooring, plus the upstream shops that plane and resaw purchased lumber into the precise stock those products are made from. If you have run your hand along a windowsill, a run of crown moulding, or a hardwood floor, you have touched this level's output.

Three things make it one coherent industry to study, and one useful lens for an investor:

• Common economics. Every business here is a conversion manufacturer — it buys wood, adds machining and finishing, and sells the finished piece for more than the wood cost it. Profit is a spread (selling price minus input-wood cost minus processing), and it lives and dies on lumber prices, how full the plants run, and how much of the mix is high-value custom work versus low-margin commodity.
• Common demand. All three ride the same two cycles — new home construction and repair, remodel, and replacement (R&R) — and are therefore highly sensitive to mortgage rates. R&R (spending on existing homes) is the larger and steadier driver across the level.
• Common cost shock. All three buy wood, so all three are exposed to lumber prices and 2025 U.S. trade policy (Canadian softwood duties near 35% and new Section 232 tariffs).

Why an investor should care: this is a large, durable, mostly private industry with defensible corners — but thin margins, real commodity exposure, and sharp cyclical swings. The distinctive point of studying it at this level is the contrast among the three children, which differ sharply in size, concentration, who owns them, and how (or whether) you can buy them on a public exchange.

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2. What's inside — the three children and how they differ

All three children make worked wood for buildings, but they are not interchangeable. The window-and-door business is the big, brand-driven, consolidated one with the only real public pure-play; the millwork-and-flooring business is the fragmented, small-shop one under substitution pressure; and cut-stock/planing is the small upstream conversion step hidden inside larger wood companies.

Contrast table (shares computed from federal receipts, 2022; concentration from the 2022 Economic Census — CR4 is the combined revenue share of the four largest firms, and the Herfindahl-Hirschman Index (HHI) is a standard concentration gauge where under 1,500 is "unconcentrated"):[1]

How to read the contrast:

• Size and jobs. Wood windows and doors is roughly half the level by revenue and 54% of its employment (60,645 of 113,205 workers) — it is the industry's center of gravity and runs the biggest factories. Cut-stock/planing is the smallest slice on both revenue and jobs, but it carries the highest revenue per worker (~$400,000, versus ~$310–315,000 in the other two) because most of that "revenue" is really pass-through wood cost, not labor.[1]
• Concentration runs the opposite way from what the brands suggest. Windows and doors feels consolidated because a few brands are household names, and the data agree (HHI 718). Millwork/flooring is genuinely fragmented (HHI ~225 — a long tail of small shops). Notably, the level as a whole is less concentrated (HHI 263) than its biggest child, because combining three industries dilutes any one firm's share.[1]
• Ownership mix is the real dividing line for investors. All three are private-dominated, but the route in differs: windows/doors is the only place with a listed near-pure-play (and a set of famous private leaders that are not for sale); millwork/flooring is a classic private-equity roll-up space; cut-stock/planing is almost entirely bundled inside bigger companies or held by small independents. Section 4 maps this in detail.

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3. How big it is (the rollup, federal figures)

Our ground-truth federal statistics for NAICS 32191 as a whole:[1]

Useful derived scale: about $11.5 million of receipts and 35 workers per establishment, and roughly $329,000 of revenue per employee — the profile of a real-factory industry, not a cottage trade, though the average hides a wide range (see the small-plant tail in millwork).[1]

The children add up cleanly. The three child industries sum almost exactly to the level: employment (60,645 + 20,181 + 32,379 = 113,205) and establishments (1,080 + 708 + 1,445 = 3,233) match to the unit, and payroll ($3.71B + $1.11B + $1.68B ≈ $6.50B) and receipts (~$19.0B + $8.05B + $10.2B ≈ $37.25B) match within rounding. Firm counts sum slightly higher than the level total (936 + 608 + 1,459 = 3,003 versus 2,976) because a company active in more than one child is counted once at this level but in each child it operates in — a small, expected overlap, not an error.[1]

Concentration (whole level). Millwork is unconcentrated: the four largest firms hold 27.4% of revenue (CR4), the top eight 40.8%, the top 20 53%, the top 50 64%, and the HHI is 263 — well inside the "unconcentrated" range.[1] Read that as: a handful of large branded players (mostly in windows/doors) sit atop a very long tail of regional mills and custom shops.

Undercount and scope caveats — important, and mostly definitional. These federal figures are not distorted by a cash or gig economy; they capture employer establishments well. The real distortions are about where NAICS draws its lines:

• Material scope. NAICS classifies by material, so this level captures only the wood part of the fenestration ("openings in a building" — windows, doors, skylights) market. Metal windows/doors (NAICS 332321) and vinyl (PVC) windows (part of 326199) — vinyl is today the most popular U.S. residential window frame material — sit outside 32191. The marquee window makers run wood, vinyl, and aluminum lines, so only their wood revenue lands here.[2]
• Vertical integration. In cut-stock/planing (321912), a company that planes and resaws its own logs is counted under sawmills (NAICS 321113), so the standalone figure understates how much conversion work actually happens in the U.S. — treat $8 billion as the "merchant" slice, not the total.[3]
• Flooring is a minority of the millwork code. Despite the "(including Flooring)" label, wood-flooring manufacturing represents only about one-fifth of NAICS 321918's ~$10 billion in shipments (~$2.2 billion); the larger share is mouldings, trim, stairs, and architectural millwork.[4]
• Small-shop tail. The millwork and cut-stock children include a long tail of very small, sometimes owner-operated shops; while most are employer businesses that do get counted, the smallest individually owned operations are the segment most prone to mild undercount.[3][4]
• Sellers and installers excluded. Retailers (Home Depot, Lowe's, Floor & Decor) and installation contractors are counted in retail and construction codes, not here — so the level measures makers, not the full millwork economy consumers actually spend into.[4]

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4. The investable universe — where value concentrates across the children

The single most important fact for a public-market investor: the pure-play public exposure sits almost entirely in one child — wood windows and doors — and even that is thin. Cut-stock/planing and millwork/flooring have no pure-play at all; you reach them bundled inside diversified wood-products, flooring, or timber companies. For a private investor, the whole level is a target-rich, fragmented, mostly private M&A field, with the strongest brands and the deepest roll-up opportunity concentrated in different children.

Public-market routes (tickers reserved for this section). Where the listed exposure actually is:

Private-market routes — where the real volume and the best brands live. The center of the level is off-market:

• Windows & doors (321911): the branded leaders — Andersen (family + employee stock ownership plan, or ESOP; the largest North American maker, ~$3.6B revenue), Pella (family-owned; 20 manufacturing locations, 10,000+ employees), and Marvin (family-owned, fourth generation; ~8,000 team members) — are not for sale; accessible private exposure runs through PE platforms such as MITER Brands (Koch-backed; bought PGT Innovations for ~$3.1B and delisted it in 2024) and Cornerstone Building Brands (Clayton, Dubilier & Rice).[5][6][7]
• Millwork & flooring (321918): the classic lower-middle-market roll-up space — PE-owned AHF Products (Paceline Equity Partners; largest North American hardwood-flooring maker; ~2,400 employees, 8 plants), Berkshire-owned Shaw Industries (major hardwood maker via Anderson Tuftex; ~$6B sales, ~18,000 staff), family-owned Woodgrain (vertically integrated moulding/millwork) and Sierra Pacific Industries (a leading moulding/millwork maker), and hundreds of custom shops.[4][8][9]
• Cut stock, resawing, planing (321912): large private producers (Sierra Pacific, Georgia-Pacific under Koch, Idaho Forest Group) run big planing/remanufacturing lines, while the independent core is hundreds of small hardwood dimension/component shops, many in the Wood Component Manufacturers Association (WCMA).[3][10]

Bottom line: public money concentrates in doors and windows plus the diversified converter (UFP); private money is the whole game across all three children.

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5. How the money works

Owners across all three children make money the way cyclical conversion manufacturers do — not the way stores, landlords, or fee businesses do. The metrics that matter are manufacturing metrics:

• The conversion spread. Buy wood, add processing, sell the finished piece for more. Profit is selling price minus (wood cost + processing cost). When lumber spikes faster than a maker can raise prices — or when it buys inventory high and prices then fall — the spread compresses fast. Managing working-capital and inventory risk on a bulky, price-swinging raw material is a core skill, especially in cut-stock/planing where wood is most of the cost. UFP Industries, for example, purchased approximately $1.7 billion of lumber (excluding panels) in 2025; lumber including plywood represented 41.6% of net sales.[3]
• Capacity utilization. Plants carry high fixed costs (buildings, kilns, moulders, finishing lines). Profitability swings hard with how full the lines run — the operating leverage cuts both ways. In 2025, JELD-WEN's North American revenue fell 20.5% to $2.15 billion, while North American adjusted EBITDA fell 60.9% to $99.5 million — the segment's adjusted EBITDA margin dropped from 9.4% to 4.6%. Company-wide gross margin fell from 18.2% (2024) to 16.0% (2025).[5]
• Product mix. In every child, commodity work (builder-grade trim, plain surfaced-four-sides board, entry-level units) competes on price and is import-exposed and low-margin; custom, branded, and engineered work (architectural millwork, impact-resistant windows, precision components, branded flooring) earns more and is harder to import. In soft markets buyers trade down, hurting mix even when unit volume holds.[4][5]
• Yield/recovery. How much sellable product you get per board foot drives margin; sawdust, shavings, and offcuts are sold as bedding, mulch, or pellets, or burned for kiln heat — turning waste into a small offset.[3]
• Input-price transmission lags. Changes in green-lumber prices historically take approximately five to six months to reach earnings as the wood must be dried before production — a lag that can hurt when prices move against a manufacturer's inventory position.[4]
• Freight as a natural moat — for the bulky, low-value pieces. Mouldings, trim, and windows are bulky and cheap per pound, so ocean freight rarely pays and domestic makers hold a structural edge. Denser, higher-value goods (wood flooring) face much harder import competition.[4]
• Brand and dealer networks are the strongest moat in windows/doors — Andersen, Pella, and Marvin command price premiums through installer loyalty and homeowner recognition, which is why the branded private leaders generally out-margin the listed volume players.[2]
• Channel concentration is significant. JELD-WEN's ten largest customers represented approximately 48% of 2025 net revenue; Home Depot represented approximately 17% and Lowe's approximately 13%. A fragmented manufacturing market selling into concentrated retail channels faces meaningful buyer power.[5]

Headline numbers to watch across the level: conversion/gross margin, capacity utilization, yield, inventory turns, and mix — not the same-store or occupancy metrics used in consumer or property industries.

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6. What drives demand

All three children share one demand engine — U.S. housing — split into two cycles:

1. Repair, remodel & replacement (R&R) — the biggest lever. There are far more existing homes than new ones, so replacement dominates: roughly two-thirds of residential window demand is replacement, and flooring/trim upgrades are core remodeling projects. Harvard's Joint Center for Housing Studies projected $509 billion of owner-occupied improvement and repair spending in 2025, with spending on track for roughly $518–524 billion by end-2026 — near a record but growth slowing to approximately 1.6% by year-end.[4][11][12]
2. New residential construction. Every new home needs windows, doors, floors, stairs, and trim, feeding the higher-volume, lower-margin builder channel. Total U.S. housing starts were 1.36 million units in 2025, down 0.6% from 2024, while single-family starts were 943,000, down 6.9%. Wood and clad-wood products skew toward single-family, custom, and higher-price applications. Starts are projected near 1.3 million in 2026, roughly flat with 2025 — a soft but stabilizing base.[13]
3. Interest and mortgage rates — the master variable. Rates gate both new construction and the appetite to finance big remodels; ~6–7% mortgages have held down existing-home turnover (a major renovation trigger). A 2026 U.S. Forest Service-supported study estimated housing-start elasticity of softwood-lumber demand at 0.59, compared with income elasticity of 0.14 — underscoring how central housing is to wood demand. Rate relief is the clearest upside catalyst for the whole level.[3][13]
4. Furniture, cabinetry, and industrial uses add demand specifically for the cut-stock/planing child (dimension parts, components, crating, specialty blanks).[3]
5. Energy efficiency, storm codes, and nonresidential work tilt demand toward the higher-margin corners — efficient and impact-resistant windows, and architectural millwork for retail/office/hospitality buildouts.[2][4]
6. Substitution — a structural headwind, not a cyclical one. Vinyl and fiberglass have taken window-frame share from wood for decades, and luxury vinyl tile (LVT) has taken flooring share from wood on price, water resistance, and easy install. Wood is now only about 12.5% of U.S. flooring sold (hardwood specifically 7.5% of value but just 3.7% of volume in 2025); resilient flooring (including LVT) now rivals carpet as the largest category. Trade-press estimates put 2025 U.S. hardwood-flooring sales at first distribution at $1.77 billion, down 3.8%, with volume declining 6.8% to 630 million square feet. This caps the wood portion's long-run growth even when the broader building cycle is strong.[4]

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7. Regulation

Because all three children buy wood and run woodworking plants, they share a regulatory spine, with a few child-specific rules on top:

• Trade duties and tariffs — the most active lever right now, and it cuts both ways. Combined U.S. antidumping (ADD) and countervailing (CVD) duties on Canadian softwood lumber roughly doubled to ~35% in mid-2025.[3][14] New Section 232 national-security tariffs added 10% on softwood timber and lumber and 25% on kitchen cabinets and vanities (an adjacent product), effective October 14, 2025; scheduled increases were delayed on December 31, 2025, holding the 25% rate through 2026.[4][15] Higher duties help domestic producers who sell lumber and protect domestic flooring makers from imports, but hurt the many shops that buy wood as feedstock — a genuine cross-current inside the same level. With the new Section 232 tariff, the total burden on some Canadian lumber approaches ~45%.[4]
• Antidumping/countervailing duties on Chinese engineered wood flooring remain in force after the USITC's 2023 sunset review found that revocation would likely cause recurring material injury — recently roughly 31.6% antidumping plus ~20.8% countervailing for most exporters, on top of a 25% Section 301 tariff.[4]
• Formaldehyde emissions (EPA TSCA Title VI). Composite panels used in engineered flooring and primed millwork (plywood, MDF, particleboard) must meet federal formaldehyde limits with third-party certification and labeling — a compliance cost especially for importers. Nonexempt laminated-product requirements expanded in 2024, and EPA proposed another technical standards update in 2026.[4]
• Lacey Act. Importers must declare wood species and country of harvest and may not trade illegally sourced wood; the record penalty (~$13.15M, flooring retailer Lumber Liquidators, 2016) shows the teeth.[4]
• Energy codes and labeling (windows/doors). State adoptions of the International Energy Conservation Code (IECC) and ASHRAE 90.1 set heat-loss (U-factor) and solar-gain limits; the National Fenestration Rating Council (NFRC) certifies the ratings that codes and ENERGY STAR reference; the current ENERGY STAR residential window specification (Version 7.0, effective October 23, 2023) uses tested U-factor, solar heat-gain coefficient, and air-leakage performance; high-velocity hurricane zones require impact testing (ASTM E1886/E1996, Miami-Dade TAS).[2]
• Federal tax credit expired. The Section 25C Energy Efficient Home Improvement Credit (up to $600/year for qualifying ENERGY STAR windows) was terminated for property placed in service after December 31, 2025 by the July 2025 tax law (the "One Big Beautiful Bill") — removing a modest replacement-demand support in 2026.[2]
• Worker and environmental safety. OSHA rules on woodworking machinery and combustible wood dust (an explosion and respiratory hazard) apply across the level; OSHA's permissible exposure limit is 15 mg/m³ total dust and 5 mg/m³ respirable dust over an eight-hour period. EPA air rules apply to finishing lines and wood-fired kilns.[3][4]

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8. Consolidation

The level as a whole is unconcentrated (HHI 263), but that headline hides very different competitive structures and a common direction: consolidation at the top, a long tail below.[1]

• Windows & doors is consolidating fastest and losing its public names. 2024 was a landmark year: Owens Corning bought Masonite (~$3.9B) and Koch-backed MITER Brands bought PGT Innovations (~$3.1B) and delisted it — removing two public names in a single year, which is why the listed universe is now so thin. The structure is a barbell: premium branded leaders (Andersen, Pella, Marvin) versus scale volume players (JELD-WEN, MITER, Cornerstone).[5][6][7]
• Millwork & flooring is a roll-up field with a persistent long tail. PE and strategics assemble platforms — Paceline's AHF has rolled up hardwood-flooring brands, UFP bolts on architectural-millwork makers, Mohawk grows by acquisition — while thousands of small custom shops survive because local, made-to-order work resists standardization. Channel power is real: the 2024 collapse of LL Flooring (formerly Lumber Liquidators) closed roughly 430 stores and cut about 2,000 jobs almost overnight, showing how a retailer failure ripples upstream.[4]
• Cut-stock/planing consolidates through vertical integration. Acquisitive converters (UFP most visibly) buy independents, while big sawmill companies (Weyerhaeuser, West Fraser, Interfor) run their own planing/remanufacturing and compete with the independents who buy from them. For historical context, in 1997 the largest four firms in cut-stock/planing accounted for only 19.5% of industry shipments; the 2022 figure is ~38%, indicating substantial consolidation over the intervening decades.[3]

Across all three, a slow structural force is material substitution — vinyl/fiberglass in windows, LVT in flooring, MDF/PVC in trim — which caps the wood segment and pushes survivors toward premium, custom, and engineered products.[4]

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9. Risks

• Housing and rate cyclicality — the dominant, shared risk. Volumes and margins across all three children swing with starts, existing-home sales, and mortgage rates; the 2025 downturn cut JELD-WEN's North American adjusted EBITDA by ~61%.[5]
• Input-cost and tariff volatility. Lumber, glass, resin, veneer, and energy prices move sharply and are now tariff-inflated; thin-margin commodity producers have little room to pass it on, and trade policy can whipsaw (duties raised, delayed, or trimmed by courts). Raw-material risk is species- and grade-specific rather than reducible to a single lumber benchmark.[3][4][14]
• Trade policy cuts both ways. The same duties that protect domestic sellers raise costs for the many shops that buy wood — the net effect depends on whether a given firm is a net seller or net buyer of lumber.[3][4]
• Structural substitution. Continued share loss from wood to vinyl/fiberglass (windows) and to LVT (flooring) is secular, not cyclical.[4]
• Loss of the 25C tax credit removes a replacement-demand support after 2025, risking a 2026 air pocket for the window/door child.[2]
• Channel concentration. Home Depot, Lowe's, and big specialty chains hold pricing power and push private label; retailer failures ripple upstream (LL Flooring collapse).[4][5]
• Labor and safety. An aging workforce, hiring difficulty, and combustible-dust/machinery hazards, plus dependence on hard-to-replace installer and millwright skills. Pella has introduced bilingual training and translation tools as it recruits a more diverse factory workforce, identifying talent availability as a major industry headwind.[2][3][4]
• Thin public liquidity. For public investors the only near-pure-play (JELD-WEN) is a volatile small-cap; every other listed route dilutes the exposure inside a bigger story.[5]

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10. How to invest & the outlook

Public-market routes (tickers/valuation reserved for here).

• Cleanest single bet: JELD-WEN (JELD) — the only listed near-pure-play in the level, but a volatile Russell 2000 small-cap with 2025 revenue of ~$3.2 billion (North America ~67%). Note that JELD-WEN spans wood, vinyl, aluminum, and fiberglass across North America and Europe, so its results cannot be mapped cleanly to U.S. wood manufacturing.[5]
• Doors inside a conglomerate: Owens Corning (OC) (~$10.1B company-wide 2025 sales) and Fortune Brands Innovations (FBIN).[2][6]
• The cross-cutting converter/miller: UFP Industries (UFPI) — the one public name that touches both cut-stock (321912) and millwork (321918); ~$6.3B revenue (2025).[3][4]
• Flooring proxy: Mohawk (MHK) (~$10.8B net sales 2025); timber/wood-products names Weyerhaeuser (WY), West Fraser (WFG), Boise Cascade (BCC), PotlatchDeltic (PCH) for the planing/remanufacturing angle.[3][4]
• Channel/demand proxies: distributor Builders FirstSource (BLDR) (~$15.2B revenue 2025) and retailers Floor & Decor (FND), Home Depot (HD), Lowe's (LOW). Expect all of these to trade on interest rates and housing data more than on millwork specifically; earnings are cyclical, so multiples and dividend coverage swing with the housing and lumber cycle.[2][4]

Private-market routes — where most of the industry actually lives. The famous window brands (Andersen, Pella, Marvin) are family/ESOP-held and not for sale; the accessible private exposure is through PE-owned platforms (MITER and Cornerstone in windows; AHF in flooring; Woodgrain and Sierra Pacific in mouldings/millwork), family-held millwork makers, and the fragmented long tail of independent mills and custom/component shops that a private buyer, a roll-up, or a search fund can actually acquire. Private-market underwriting should separate manufacturing EBITDA from installation and dealer earnings, map revenue by material and end market, and examine yield by species and grade, plant utilization, delivered freight radius, working-capital seasonality, compliance systems, warranty reserves, dealer concentration, backlog quality, price-cost lag, and maintenance capital.[4][5][6][8][9][10]

Outlook (forward-looking judgment). The near-term picture across the level is soft but stabilizing: 2024–25 fell hard, housing starts roughly flat near 1.3 million in 2026, remodeling growing only low-single-digits (~1.6% by year-end 2026), and ~6–7% mortgages capping the upside, with the 25C credit's expiration a specific 2026 headwind for windows/doors.[2][11][12][13] Wood flooring specifically faces continued share loss to luxury vinyl, with 2025 hardwood sales down nearly 4% and volume down nearly 7%.[4] The durable structural themes are continued consolidation (fewer, larger players and a thinner public roster, most visibly in windows/doors), ongoing material substitution (vinyl/fiberglass and LVT capping the wood segments), and a value tilt toward the defensible corners — premium impact-resistant and high-efficiency windows, custom and architectural millwork, and domestic mouldings insulated by freight economics — over commodity flooring and trim. The clearest shared upside catalyst is rate relief: lower mortgage rates would revive home turnover and remodeling, and this level has historically been an early beneficiary when the housing cycle turns. As with all cyclicals, the best historical entry points have come when housing pessimism is deepest, not when starts are peaking.

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Sources

1. U.S. Census Bureau, 2022 Economic Census and 2023 County Business Patterns — NAICS 32191 and its children 321911/321912/321918: receipts, firm counts, establishments, employment, payroll, and concentration ratios (CR4/CR8/CR20/CR50, HHI). Histometrics federal-statistics compilation. https://www.census.gov/programs-surveys/economic-census.html; https://www.census.gov/programs-surveys/cbp.html
2. Wood Window & Door child primer (NAICS 321911) and its sources — JELD-WEN, Owens Corning/Masonite, Fortune Brands, Andersen, Pella, Marvin; NAICS material-scope cross-references (332321 metal, 326199 vinyl); NFRC/IECC energy codes; ENERGY STAR Version 7.0; IRS Section 25C termination under the July 2025 tax law; Pella labor challenges. https://www.census.gov/naics/
3. Cut Stock, Resawing & Planing child primer (NAICS 321912) and its sources — conversion-spread economics, sawmill vertical-integration undercount (321113), UFP Industries as converter proxy (lumber purchases, customer concentration), Canadian softwood duties, WCMA, housing-start elasticity (USFS 2026 study), historical concentration (1997 vs. 2022). https://www.census.gov/programs-surveys/economic-census.html
4. Other Millwork incl. Flooring child primer (NAICS 321918) and its sources — Mohawk, UFP, AHF Products, Shaw, Woodgrain; flooring as minority of code (~$2.2B of ~$10B); wood ~12.5% of U.S. flooring (hardwood 7.5% value, 3.7% volume) and LVT substitution; 2025 hardwood sales/volume decline; input-price lag; formaldehyde (EPA TSCA Title VI 2024/2026 updates); Lacey Act; Section 232 tariffs (10% softwood, 25% cabinets); Chinese-flooring duties (~31.6% AD + ~20.8% CVD + 25% Section 301); LL Flooring collapse (~430 stores, ~2,000 jobs). https://www.census.gov/programs-surveys/economic-census.html
5. JELD-WEN Holding, Inc., 2025 Form 10-K and Q4/FY2024–2025 results — ~$3.2B revenue, North America ~67%, North American revenue down 20.5% to $2.15B, North American adjusted EBITDA down 60.9% to $99.5M (margin 9.4% → 4.6%), company-wide gross margin 18.2% → 16.0%, top 10 customers ~48% of revenue (Home Depot ~17%, Lowe's ~13%). https://investors.jeld-wen.com/
6. Owens Corning, "$3.9 Billion Acquisition of Masonite" announcement and completion, 2024; 2025 Form 10-K (~$10.1B company-wide). https://investor.owenscorning.com/
7. MITER Brands, "MITER Brands Completes Acquisition of PGT Innovations" (Business Wire), 2024. https://www.businesswire.com/news/home/20240327387754/en/
8. AHF Products / Business Wire, "Paceline Equity Partners Completes Acquisition of AHF Products" (~2,400 employees, 8 plants), 2022. https://www.ahfproducts.com/en-us/press/paceline-equity-partners-acquire-leading-hard-surface-flooring-manufacturer.html
9. Shaw Industries Group company profile (~$6B sales, ~18,000 staff), Woodgrain corporate information, Sierra Pacific Industries millwork profile, 2024–2025. https://shawinc.com/company-profile; https://woodgrain.com/
10. Wood Component Manufacturers Association (WCMA), "Manufacturers / About," 2025. https://wcma.com/
11. Joint Center for Housing Studies of Harvard University (JCHS), remodeling outlook / Leading Indicator of Remodeling Activity (LIRA) — $509B owner-occupied improvement spending 2025, ~$518–524B by end-2026, growth ~1.6%, 2025–2026. https://www.jchs.harvard.edu/research-areas/remodeling/lira
12. Harvard JCHS remodeling blog — homeowner improvement spending projections, 2025–2026. https://www.jchs.harvard.edu/blog/remodeling-growth-set-downshift-late-2026
13. National Association of Home Builders (NAHB) / Forisk, 2025 actual and 2026 housing-starts outlook — 2025 total starts 1.36M (down 0.6%), single-family 943K (down 6.9%); 2026 starts near 1.3M. https://www.nahb.org/news-and-economics; https://forisk.com/u-s-housing-starts-outlook-q1-2026-update/
14. NAHB, "Canadian Lumber Duties Hit 35% — And May Go Higher Soon," 2025; Congressional Research Service, "U.S.–Canada Softwood Lumber Trade: Current Issues for Congress" (R48781), 2025. https://www.nahb.org/blog/2025/08/canadian-lumber-cvd-rates
15. The White House / U.S. Customs and Border Protection, "Section 232 Tariffs on Timber, Lumber, and Derivative Products" — 10% softwood timber/lumber, 25% kitchen cabinets/vanities, effective Oct. 14, 2025; Dec. 31, 2025 delay holding 25% rate through 2026. https://www.whitehouse.gov/presidential-actions/2025/09/adjusting-imports-of-timber-lumber-and-their-derivative-products-into-the-united-states/