Siding Contractors (U.S., NAICS 238170)

1. Overview

Siding contractors install the exterior skin of a building — vinyl, fiber cement, engineered wood, aluminum, or steel siding, plus the gutters, downspouts, fascia, soffits, and flashing that usually go with it. It is a labor-intensive, local, project-based trade organized under North American Industry Classification System (NAICS) code 238170: crews bid a job, buy materials from a distributor, install over a few days, and move on. The work spans new construction, additions, alterations, repairs, and maintenance.[1] The federal government counts about 9,142 siding-contractor establishments employing roughly 41,885 people, with about $10.8 billion in annual receipts.[2][3] Those figures understate the real footprint, because a large share of siding work is done by self-employed installers and by roofing or general-remodeling firms counted under other codes (see Section 3).

Why it matters to an investor — public or private: siding sits at the intersection of two durable spending streams — new-home construction and the much larger, more stable repair-and-remodel (R&R) market, where U.S. homeowner improvement spending has run near a record ~$524 billion.[9] A meaningful slice of demand is non-discretionary (aging homes, storm damage funded by insurance), which cushions the cyclicality.

Ways in differ sharply by investor type. There is no listed pure-play siding contractor — the trade itself is overwhelmingly private and fragmented. Public-market investors get exposure indirectly, through siding-material makers, building-products distributors, and diversified installation platforms. Private investors get direct exposure by buying or backing local installers — the model private equity (PE) is now consolidating aggressively (Section 8). The long-term case is attractive (aging housing, recurring replacement, a fragmented contractor base), but near-term returns are execution-dependent: labor, safety, customer acquisition, working capital, and housing conditions matter more than headline national market growth.

2. What it is and how it's structured

Scope. NAICS 238170 covers establishments primarily engaged in installing siding of wood, aluminum, vinyl, or other exterior finish material (except brick, stone, stucco, or curtain wall), including gutter and downspout installation, on new work, additions, alterations, maintenance, and repairs.[1]

The basic chain: homeowner or builder → contractor sales process → material procurement → crew installation → inspection, warranty, and payment. Remodeling is often sold directly to the property owner; new construction is frequently subcontracted by a general contractor or homebuilder. Firms use employees, independent crews, or a mix.

What it explicitly excludes (each a separate NAICS code — the distinction matters because the same crew often does more than one):

• Brick, stone, and stucco exterior finish — 238140 Masonry Contractors.[1]
• Curtain wall (glass or metal exterior wall systems) — 238190 Other Foundation, Structure, and Building Exterior Contractors.[1]
• Roofing — 238160 Roofing Contractors. Not part of the official 238170 cross-reference, but very commonly bundled with siding by the same firm and counted separately.
• Manufacturing the siding itself (vinyl, fiber cement, engineered wood) — a building-materials factory activity, not a contractor code. James Hardie, Louisiana-Pacific, Westlake, and Cornerstone Building Brands are manufacturers, not 238170 contractors.

Ownership mix. This is a small-business, owner-operated trade. The average establishment has roughly five employees (41,885 workers across ~9,142 establishments) and the average firm roughly $1.3 million in annual receipts ($10.8 billion across ~8,594 firms).[2][3] Most firms are single-location S-corporations, limited-liability companies, or sole proprietorships. On top of the counted employer firms sit many nonemployer businesses — individual installers and crews with no payroll. Regional platforms, builder-focused subcontractors, franchises (e.g., ABC Seamless steel siding), and a growing tier of PE-backed roll-ups exist, but they are the exception, not the norm. The supplied federal file does not cleanly report the ownership split, so this is a practitioner's read rather than a Census statistic.

3. How big it is

Federal figures for NAICS 238170. The years differ because the sources are separate federal programs; do not treat them as a single-year trend series.

The Economic Census's Herfindahl-Hirschman Index (HHI, a standard market-concentration measure) is suppressed in the supplied file; no value is inferred.

The undercount caveat is real here. These federal statistics cover establishments and firms with payroll. They miss two big pieces. First, nonemployer siding businesses (self-employed installers, one- and two-person crews) are excluded from County Business Patterns and from the receipts total — a common feature of the trades. Second, an enormous amount of siding installation is performed by firms classified elsewhere: roofing contractors (238160), general remodelers, and direct-to-consumer exterior-remodeling companies. Because of this, private research firms estimate the U.S. siding contractor-services market at roughly $18 billion and the contractor population at around 35,000 — well above the ~$10.8 billion and ~8,600 employer firms the Census counts.[5] Those private estimates use broader definitions and different methods; treat them as order-of-magnitude, not directly comparable to the federal line. The honest read: the federal data accurately describe the employer core of the trade, but the full economic activity of installing siding in the U.S. is larger.

The supplied file also does not provide a reliable split between new construction and remodeling, employee versus subcontracted labor, siding versus gutter revenue, geographic market shares, average ticket, or capacity utilization. Where those matter below, they are flagged as absent from our federal data.

4. The investable universe

There is no listed pure-play siding installer whose reported revenue is primarily NAICS 238170. Public exposure comes through three adjacent layers — materials, distribution, and diversified installation services — plus private consolidators. Listings use the New York Stock Exchange (NYSE) unless noted.

Public companies (indirect exposure):

Note the mismatch: JHX, LPX, and WLK profits track siding volume and material mix, not installer margins; IBP and QXO's installation arms are weighted toward insulation, not siding; BLDR, HD, and LOW are channel plays. None gives clean, direct exposure to siding-contractor economics.

Private and other major owners:

• Power Home Remodeling — the largest U.S. exterior remodeler (~$1.7B revenue, 5,000+ employees, 20+ states; siding, roofing, windows, doors, insulation, solar), backed by Bain Capital, Sixth Street, and Harvest Partners.[20]
• Cornerstone Building Brands (Ply Gem, Mastic vinyl siding) — a leading vinyl-siding manufacturer, taken private by Clayton, Dubilier & Rice (CD&R). A supply-chain exposure, not a contractor.[18]
• ABC Supply — privately held, Hendricks-family-controlled distributor of roofing, siding, gutters, windows, and related products.[19]
• Southern Exteriors — private residential exterior-products installer (siding, roofing, gutters, house wrap, windows); acquired by Monomoy Capital Partners in 2024.[21]
• DaBella and ABC Seamless (franchise) — large multi-state installers.
• PE exterior-services platforms rolling up local installers — Vertex Service Partners (Alpine Investors), Infinity Home Services (Freeman Spogli/LightBay), Omnia Exterior Solutions (CCMP), Aligned Exteriors Group.[22]
• The long tail: ~8,600 counted employer firms plus thousands of nonemployer installers. Local and regional contractors remain the dominant ownership category.

5. How the money works

A siding contractor is a project-margin business, not a recurring-revenue one. Owners earn on the spread between what they charge for an installed job and what the job costs in materials, labor, and overhead — not on selling material alone.

Unit economics of a job. Work is priced per square foot (or per "square" = 100 sq ft) of wall. Installed vinyl typically runs about $4.50–$8.20 per square foot; fiber cement about $5–$14 per square foot in materials plus $2–$8 in labor, with a national fiber-cement project averaging near $14,700.[28][30] Within a job:

• Materials (siding, trim, house wrap, flashing, fasteners, gutters, disposal) are roughly 40–50% of cost.[29]
• Labor (employee or subcontractor) is roughly 35–55% of cost — about $40–$75/hr, or $2–$3.65/sq ft to install vinyl; more for heavier, rigid fiber cement.[28][29]
• What's left after direct materials and labor is gross margin. Net margins are thin — typically single digits to low teens — after sales and marketing (lead generation is a big line for consumer-facing firms), trucks and lifts, general liability and workers'-compensation insurance, bonding, permits, warranty reserves, callbacks, and financing/bad-debt costs.

Two demand channels with different economics:

• New construction (builder channel): higher volume, lower margin, price-competitive, tied to housing starts and builder concentration.
• Repair/remodel/replacement (homeowner channel): higher margin, more stable, often storm- and insurance-funded, driven by marketing and financing offers. This is where the branded consumer remodelers concentrate.

What owners actually watch (metrics that fit this trade): booked jobs and backlog; lead cost / customer-acquisition cost and lead-to-sale conversion (and cancellation) rate; average ticket and revenue per crew-day; crew utilization, installation throughput, and labor retention; gross profit after materials and install labor; warranty/callback and rework rate; and accounts receivable, deposits, supplier terms, and cash conversion. There is no federal capacity-utilization series for 238170; capacity is best read through crew availability, schedule fill, and output per crew-day. Because work is weather-dependent, revenue is seasonal (spring–fall peak) and lumpy; working capital swings with material deposits and progress billing, and input cost hinges on the lag between selling a job at a fixed price and installing it.

Why scale is hard. Labor is local and hands-on, so there are limited manufacturing-style economies. Durable advantage comes from marketing and lead flow, manufacturer certifications (e.g., James Hardie "Elite Preferred"), financing partnerships, warranty/brand, dense local crew coverage, and — for consolidators — centralized procurement and back-office leverage across many branches.

6. What drives demand

• Aging housing stock and the replacement cycle. Vinyl lasts roughly 20–40 years and fiber cement 30–50; a large, older U.S. housing base creates a steady replacement pipeline largely independent of the economy.
• Repair-and-remodel spending. Homeowner improvement outlays near a record ~$524 billion set the backdrop; the Joint Center for Housing Studies (JCHS) at Harvard identifies aging homes, energy efficiency, property values, and disaster resilience as major remodeling drivers, and siding is a common big-ticket exterior project.[9]
• Existing-home sales and home equity. Siding is frequently replaced around a sale, and cash-out refinancings and home-equity-line-of-credit (HELOC)-funded remodels rise with home prices. Big-ticket remodels are often financed, so demand softens when borrowing costs rise.
• New single-family construction drives the builder channel; it is more cyclical and rate-sensitive.
• Weather and storms. Hail, wind, and hurricanes generate insurance-funded, largely non-discretionary replacement — concentrated in "hail alley" (Texas, Colorado, the Upper Midwest) and coastal storm zones. This is a meaningful, partly counter-cyclical demand source (though storms also disrupt crews and raise warranty risk).
• Material-mix shift / premiumization. A structural move from vinyl toward fiber cement and engineered wood raises the dollar value per job. Vinyl remains the most-used material by volume (competing on cost and ease of install); fiber cement is the fastest-growing premium segment, led by James Hardie, which controls roughly a third of North American fiber-cement demand.[6][7]
• Curb appeal, energy efficiency, and resale ROI, plus wildfire codes favoring non-combustible fiber cement in the wildland-urban interface (WUI).

Forecast. JCHS's Leading Indicator of Remodeling Activity (LIRA) — a broad homeowner-remodeling gauge, not a 238170-specific series — projects remodeling-spending growth slowing to roughly 0.5% by early 2027, below inflation, even as the level stays near record highs.[8] The direction of interest rates is the biggest swing factor for the financed-remodel and new-construction channels.

7. Regulation

• Licensing is state- and local-level and highly variable — many states require a general-contractor or home-improvement license, bonding, and liability insurance; some require little. There is no single federal siding license.
• OSHA safety standards. The Occupational Safety and Health Administration (OSHA) construction standard generally requires fall protection for employees working six feet or more above lower levels; ladder, scaffold, lift, electrical, and training rules also apply.[26] Fall protection is the leading injury-and-enforcement area.
• Silica (fiber cement). Cutting fiber-cement board releases respirable crystalline silica, bringing the job under OSHA's construction silica standard (29 CFR 1926.1153) — requiring dust controls, wet cutting or vacuum shrouds, and respiratory protection.[25] (CFR = Code of Federal Regulations.)
• EPA Lead Renovation, Repair, and Painting (RRP) Rule. Any firm disturbing painted surfaces in homes or child-occupied facilities built before 1978 must be an Environmental Protection Agency (EPA)-certified firm, use a certified renovator, and follow lead-safe work practices. Certification runs five years; violations can draw fines up to about $41,056 per violation.[24] Siding removal on older homes routinely triggers this.
• Building codes and permits. Local jurisdictions adopt and amend model codes — the International Code Council (ICC) I-Codes are the widely used base — governing wind, fire, moisture, and energy ratings; WUI zones increasingly mandate non-combustible cladding; most jobs need a permit.[27]
• Consumer-protection law. Home-improvement contractor statutes regulate deposits, written contracts, and cancellation rights in many states.
• Immigration/workforce. Given the heavily foreign-born trade workforce, Employment Eligibility Verification (Form I-9) enforcement directly affects labor supply (Section 9).

For investors, compliance is verifiable through licenses, permits, insurance certificates, OSHA records, lead-safe certifications, subcontractor agreements, and warranty reserves.

8. Competitive dynamics and consolidation

The national industry is extremely fragmented. The largest four firms hold only about 11.1% of receipts, the top 8 about 14.6%, the top 20 about 19.8%, and even the top 50 just 28.4%; the HHI is suppressed in the federal data but is clearly very low.[3] Thousands of local players compete mostly on price, availability, reputation, and lead flow. Local markets can nevertheless be tighter than the national numbers suggest, because homeowners value reputation, referrals, manufacturer certification, and workmanship.

Competitive advantages: dense local crew coverage; reliable lead generation and sales conversion; builder and distributor relationships; procurement scale; consistent estimating, scheduling, and quality control; strong warranties and low callbacks; licensing/safety/manufacturer certifications; and technology for estimating, visualization, routing, and customer communication.

Three consolidation forces are reshaping the map:

1. Private-equity roll-ups. Backed platforms are buying local siding/roofing/exterior installers — often at mid-single-digit to high-single-digit EBITDA multiples — then centralizing marketing, procurement, and administration and cross-selling roofing, windows, and gutters. Deal cadence in the adjacent roofing space reached roughly one platform-level transaction every two days in 2025, and the same capital is active in siding.[22]
2. Distribution and installation consolidation. QXO's ~$11 billion purchase of Beacon Roofing Supply (April 2025) and ~$17 billion acquisition of TopBuild (completed July 1, 2026) built the largest listed distributor-plus-installer of roofing, insulation, and complementary exterior products, tightening the channel that supplies installers.[14][15] James Hardie's ~$8.4 billion AZEK acquisition (2025) added composite exteriors to the fiber-cement leader.[10] These deals show investor appetite for distribution, installation capability, and exterior-product platforms — but they do not prove the direct siding-contractor market has become concentrated.
3. Manufacturer pull-through. Siding makers steer demand and lock in installers through certified-contractor programs (James Hardie Elite Preferred, LP's programs), factory-finished color systems, and warranties — shifting bargaining power toward the material brands.

Direct-to-consumer national remodelers (Power Home Remodeling, DaBella) are a fourth force, scaling through marketing rather than acquisition. A siding roll-up can create value through purchasing, centralized marketing, technology, and back-office savings; the principal risks are losing the acquired owner, sales team, or crews, degrading installation quality, and using leverage against volatile cash flows.

9. Risks

• Housing and rate cyclicality. The builder channel and financed remodels contract when housing starts, home sales, or credit tighten and when rates rise. (Partly offset by non-discretionary storm/replacement demand.)
• Labor availability and cost. The construction workforce is heavily foreign-born; tighter immigration enforcement in 2025 reduced crew availability and pushed wages up. Construction wages reached roughly $39.69/hr, about 9% above the private-sector average, with a large majority of firms reporting hiring difficulty.[23]
• Material-cost and tariff volatility. Vinyl (polyvinyl chloride, or PVC, resin — oil-linked), fiber cement, engineered wood, aluminum, and steel prices swing; 2025 tariff escalation pushed many construction bids ~10% above prior projections, squeezing fixed-price contracts.[23]
• Thin margins and fixed-price risk. Cost overruns on bid work fall on the contractor; warranty claims, callbacks, disputed change orders, and moisture-intrusion litigation can erode profit.
• Safety and insurance. Falls, silica exposure, and vehicle accidents drive injury liability and rising insurance costs.
• Seasonality, weather, and customer concentration. Revenue is lumpy and weather-dependent; storm reliance concentrates risk regionally; and builder- or distributor-heavy books add customer-concentration risk.
• Compliance. State licensing, permit, lead-paint, code, and worker-classification (employee vs. subcontractor) violations carry real penalties.
• PE leverage. Aggressive acquisition assumptions and debt against volatile cash flows.
• Indirect-exposure risk for public investors. The listed proxies are materials, distribution, or insulation-weighted installation businesses; their results reflect siding only partially and can diverge from installer economics. Federal undercounting of nonemployer and informal operators also complicates any market-size or share analysis.

10. How to invest and the outlook

Public routes. First determine what exposure you are actually buying:

• Manufacturer exposure (most direct to siding product, but manufacturing economics): James Hardie (JHX), the fiber-cement leader enlarged by the AZEK deal; Louisiana-Pacific (LPX), whose engineered-wood Siding segment carries ~25% EBITDA margins and has been a growth standout; and Westlake (WLK) for vinyl and other exterior products.[11][12][16]
• Distribution and installation exposure: QXO (now spanning Beacon distribution and TopBuild's installation platform) and Builders FirstSource (BLDR), with Home Depot (HD) and Lowe's (LOW) as broad retail proxies.[15][17]
• Diversified installation discipline: Installed Building Products (IBP) is a useful operating comparison, though its reported categories do not establish a siding-revenue proxy.[13]

Tickers, valuations, and dividend policies vary; none is a pure siding play, so position sizing should reflect that the read-through is partial.

Private routes. Direct exposure means owning or backing installers:

• Direct acquisition of regional siding/exterior-remodeling contractors.
• The exterior-services roll-up — acquiring profitable local firms at mid-to-high-single-digit EBITDA multiples and building regional platforms (Vertex, Infinity Home Services, Omnia, Aligned Exteriors), or the direct-to-consumer remodeler model (Power Home Remodeling).
• Private credit backed by receivables, equipment, inventory, or owner guarantees.
• Private distributors and manufacturers serving siding contractors.

Franchising (ABC Seamless) and manufacturer-certified-contractor networks are lower-cost entry points. Because the trade is so fragmented, sourcing and integration — not underlying demand — are the hard part. The diligence priority is job-level economics, not headline revenue: customer-acquisition sources, close and cancellation rates, crew productivity, subcontractor dependence, material pass-through, warranty history, cash conversion, licensing, safety, customer concentration, and the true share of revenue that is actually siding installation.

Outlook. Near term, the environment is mixed: remodeling demand should be steadier than new construction, but broad growth is decelerating (LIRA points to ~0.5% by early 2027) and financing costs remain important.[8] Structural tailwinds — an aging housing stock, deferred exterior maintenance, the vinyl-to-fiber-cement mix shift, storm-driven replacement, outsourced installation, and accelerating consolidation of a very low-concentration market — look more durable than the near-term cycle. The key watch-items are labor supply (immigration enforcement) and input-cost/tariff inflation, both of which can compress the trade's already-thin margins even when demand holds. The strongest businesses are likely to be disciplined regional operators with local density, reliable crews, strong quality control, and conservative working-capital management.

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Sources

1. U.S. Census Bureau, "2022 NAICS Definition — 238170 Siding Contractors" (scope and cross-references). https://www.census.gov/naics/?input=238170&year=2022&details=238170
2. U.S. Census Bureau, "County Business Patterns 2023 (NAICS 238170)," 2025. https://data.census.gov/table/CBP2023.CB2300CBP?codeset=naics~238170
3. U.S. Census Bureau, "2022 Economic Census — Concentration of Largest Firms / Selected Statistics (NAICS 238170)," 2024–2025. https://data.census.gov/table/ECNSIZE2022.EC2200SIZECONCEN
4. U.S. Small Business Administration, "Table of Small Business Size Standards (NAICS 238170)," 2023. https://www.sba.gov/document/support-table-size-standards
5. Fortune Business Insights, "Siding Market Size, Share, Growth & Trends Forecast," 2025. https://www.fortunebusinessinsights.com/siding-market-117264
6. IMARC Group, "Siding Market Size, Share, Growth & Trends," 2025. https://www.imarcgroup.com/siding-market
7. The Farnsworth Group, "7 Top Trends in the U.S. Siding Industry," 2025. https://www.thefarnsworthgroup.com/blog/siding-industry-trends
8. Joint Center for Housing Studies of Harvard University, "Remodeling Growth to Slow Sharply in Early 2027" (Leading Indicator of Remodeling Activity), 2026. https://www.jchs.harvard.edu/press-releases/remodeling-growth-slow-sharply-early-2027
9. Joint Center for Housing Studies of Harvard University, "Remodeling Soars to New Heights, but Industry Struggles to Address Labor Shortages and Urgent Needs for Energy Efficiency and Disaster Resilience," 2025. https://www.jchs.harvard.edu/press-releases/remodeling-soars-new-heights-industry-struggles-address-labor-shortages-and-urgent
10. James Hardie Industries, "James Hardie Completes Acquisition of AZEK," press release, July 2025. https://www.jameshardie.com/all-about-james-hardie/press-releases/performance/james-hardie-completes-acquisition-of-azek/
11. James Hardie Industries plc, Annual Report on Form 10-K (fiscal year ended March 31, 2026), 2026. https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=0001159152&type=10-K
12. Business Wire, "LP Building Solutions Reports Third Quarter 2024 Results (Record Siding Sales)," 2024. https://www.businesswire.com/news/home/20241105756494/en/
13. Business Wire, "Installed Building Products Reports Record Fourth Quarter 2024 Results," 2025. https://www.businesswire.com/news/home/20250226863227/en/
14. QXO, Inc., "QXO Completes Acquisition of Beacon Roofing Supply," press release, April 2025. https://investors.qxo.com/news/news-details/2025/QXO-Completes-Acquisition-of-Beacon-Roofing-Supply/default.aspx
15. QXO, Inc., "QXO Completes Acquisition of TopBuild," press release / Form 8-K, July 1, 2026. https://investors.qxo.com/news/news-details/2026/QXO-and-TopBuild-Stockholders-Overwhelmingly-Approve-QXOs-Acquisition-of-TopBuild/default.aspx
16. Westlake Corporation, Annual Report on Form 10-K (year ended December 31, 2025), 2026. https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=0001262823&type=10-K
17. Builders FirstSource, Annual Report on Form 10-K (year ended December 31, 2025), 2026. https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=0001316835&type=10-K
18. Cornerstone Building Brands, Annual Report on Form 10-K (year ended December 31, 2025), 2026. https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=0000883902&type=10-K
19. ABC Supply Co., "Fact Sheet," 2026. https://www.abcsupply.com/media-center/fact-sheet/
20. Bain Capital, "Power Home Remodeling Secures Investment from Bain Capital, Sixth Street, and Harvest Partners," 2025. https://www.baincapital.com/news/power-home-remodeling-secures-investment-bain-capital-sixth-street-and-harvest-partners
21. Monomoy Capital Partners, "Southern Exteriors," 2024. https://www.mcpfunds.com/investment/southern-exteriors/
22. Roofing Contractor, "Roofing's Big Deal: What Contractors Need to Know About Private Equity in 2025," 2025. https://www.roofingcontractor.com/articles/100478-roofings-big-deal-what-contractors-need-to-know-about-private-equity-in-2025
23. Roofing Contractor, "Labor Shortages Mount Under Tariffs, Immigration Crackdown," 2025. https://www.roofingcontractor.com/articles/101248-labor-shortages-mount-under-tariffs-immigration-crackdown
24. U.S. Environmental Protection Agency, "Lead Renovation, Repair and Painting (RRP) Program," 2025. https://www.epa.gov/lead/lead-renovation-repair-and-painting-program
25. U.S. Occupational Safety and Health Administration, "Respirable Crystalline Silica — Construction Standard (29 CFR 1926.1153)," accessed 2026. https://www.osha.gov/laws-regs/regulations/standardnumber/1926/1926.1153
26. U.S. Occupational Safety and Health Administration, "1926.501 — Duty to Have Fall Protection," accessed 2026. https://www.osha.gov/laws-regs/regulations/standardnumber/1926/1926.501
27. International Code Council, "The International Codes (I-Codes)," current edition. https://www.iccsafe.org/products-and-services/i-codes/the-i-codes/
28. Angi, "How Much Does Siding Cost to Replace or Install? [2026 Data]," 2026. https://www.angi.com/articles/how-much-does-siding-cost-replace.htm
29. CountBricks, "Labor Price per Square Foot to Install Vinyl Siding," 2025–2026. https://www.countbricks.com/post/labor-price-per-square-foot-install-vinyl-siding
30. Modernize, "2026 Home Siding Cost Calculator," 2026. https://modernize.com/siding/cost-calculator