423330

Roofing, Siding, and Insulation Material Merchant Wholesalers

Wholesale Trade › Merchant Wholesalers, Durable Goods › Lumber and Other Construction Materials Merchant Wholesalers

SBA Size Standard

500 employees

Employee-Based Verify at SBA.gov →

NAICS Code Hierarchy

42

Sector

Wholesale Trade

423

Subsector

Merchant Wholesalers, Durable Goods

4233

Industry Group

Lumber and Other Construction Materials Merchant Wholesalers

423330

National Industry (This Code)

Roofing, Siding, and Insulation Material Merchant Wholesalers

Official NAICS Description

Source: U.S. Census Bureau 2022 NAICS

📘 Source: U.S. Census Bureau — 2022 NAICS Manual
This industry comprises establishments primarily engaged in the merchant wholesale distribution of nonwood roofing and nonwood siding and insulation materials.

✓ Small Business Eligibility at a Glance

Based on SBA Table of Small Business Size Standards (2024)

Size Standard

500 employees

Measurement Period

Current count

Standard Type

Employee-Based

Applies To

All contracts under NAICS 423330

Set-Aside Programs

8(a), WOSB, HUBZone, SDVOSB

Certification Required

No (self-certify in SAM.gov)

Size standards are set by the SBA and reviewed periodically. Always verify at SBA.gov before bidding.

Cross-References

The following activities are classified elsewhere in the NAICS system:

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.

How to Use NAICS 423330 in SAM.gov

NAICS code 423330Roofing, Siding, and Insulation Material Merchant Wholesalers — is used in SAM.gov to identify businesses whose primary activity falls within this classification. When you add this code to your SAM.gov entity registration, contracting officers searching for vendors in the Lumber and Other Construction Materials Merchant Wholesalers space will be able to find your business.

If this code represents your primary business activity, designate it as your primary NAICS code. Your primary NAICS code determines your size standard for any contract solicited under this code. With a size standard of 500 employees, your business must be at or below this threshold to qualify as a small business for set-aside contracts under NAICS 423330.

Log in Entity Registration Goods & Services Add NAICS Code Enter 423330 Save

Frequently Asked Questions

What is NAICS code 423330?

NAICS code 423330 is 'Roofing, Siding, and Insulation Material Merchant Wholesalers', classified under the Wholesale Trade sector (NAICS 42). This industry comprises establishments primarily engaged in the merchant wholesale distribution of nonwood roofing and nonwood siding and insulation materials. Cross-References.

What is the SBA small business size standard for NAICS code 423330?

The SBA defines a small business under NAICS code 423330 (Roofing, Siding, and Insulation Material Merchant Wholesalers) as one with 500 employees. This size standard determines eligibility for small business set-aside contracts, 8(a), HUBZone, WOSB, and SDVOSB programs in SAM.gov.

How do I register NAICS code 423330 in SAM.gov?

To register NAICS code 423330 in SAM.gov: (1) Log in at sam.gov, (2) Navigate to your Entity Registration, (3) Go to the Assertions section, (4) Add 423330 (Roofing, Siding, and Insulation Material Merchant Wholesalers) to your NAICS code list. You may designate one code as your Primary NAICS code.

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Related NAICS Codes

Other codes in Lumber and Other Construction Materials Merchant Wholesalers

Related PSC Codes

PSC codes commonly used with this NAICS sector

Source: GSA PSC Manual April 2025

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