423330 — Roofing, Siding, and Insulation Material Merchant Wholesalers
NAICS 423330 is 'Roofing, Siding, and Insulation Material Merchant Wholesalers', a 2022 U.S. national industry under Sector 42 (Wholesale Trade); the SBA small-business size standard is 225 employees.
Description
This industry comprises establishments primarily engaged in the merchant wholesale distribution of nonwood roofing and nonwood siding and insulation materials.
Exclusions & Cross-References
- Establishments primarily engaged in the merchant wholesale distribution of wood roofing and wood siding are
- classified in Industry 423310, Lumber, Plywood, Millwork, and Wood Panel Merchant Wholesalers.
Overview Facts
| NAICS Code | 423330 |
|---|---|
| Industry Title | Roofing, Siding, and Insulation Material Merchant Wholesalers |
| SBA Size Standard | 225 employees |
| IRS PBA Code | 423300 (rolled-up match) |
| Sectors Hierarchy | Sector 42 → 423 → 4233 |
| Source / Verified | US Census 2022 NAICS Manual / 2026-06-28 |
NAICS Structure: 423330
National Industry
Sector (2)
42
Wholesale Trade
Subsector (3)
423
Merchant Wholesalers, Durable Goods
Industry Group (4)
4233
Lumber and Other Construction Materials Merchant Wholesalers
Industry (5)
42333
Roofing, Siding, and Insulation Material Merchant Wholesalers
National Industry (6)
423330
Roofing, Siding, and Insulation Material Merchant Wholesalers
Legacy SIC Concordance
Trace the historical mapping chain from the 1987 Standard Industrial Classification (SIC) to the modern 2022 NAICS code format.
- SIC 5033 - Roofing, Siding, and Insulation Materials (via SIC1987:5033→NAICS1997:42133→2002:423330→2007:423330→2012:423330→2017:423330→2022:423330)
Related Resources & Compliance Guides
Further regulatory reference links for NAICS code 423330:
- Sector 42 Directory Hub — List of related industries in the Wholesale Trade sector.
- SIC ↔ NAICS Crosswalk Tool — Look up mappings between legacy SIC codes and modern classifications.
- SBA Size Standards Guide — Complete rules and averaging periods for small business classifications.
- Calculating Annual Receipts Guide — Detailed worked example of revenue calculation rules.
- IRS Principal Business Activity Guide — How NAICS codes map to corporate and entity tax filings.
Related Industries in 4233
Frequently Asked Questions (FAQ)
Is 423330 a valid 2022 NAICS code?
NAICS 423330 is 'Roofing, Siding, and Insulation Material Merchant Wholesalers', a 2022 U.S. national industry under Sector 42 (Wholesale Trade); the SBA small-business size standard is 225 employees.
What is the SBA size standard for NAICS 423330?
The SBA small business size standard for NAICS 423330 is 225 employees (based on employees).
What is the legacy SIC code mapping for 423330?
NAICS code 423330 maps to the legacy 1987 SIC codes: 5033 - Roofing, Siding, and Insulation Materials.