What is National Certified Testing Laboratories, Inc.'s NAICS code?

National Certified Testing Laboratories, Inc.'s NAICS code is 4233 (Lumber and Other Construction Materials Merchant Wholesalers).

Insights

Expansion footprints Multi-location NFRC and CMA approved testing capabilities across York, Everett, and Orlando present a strong opportunity to offer national or regional testing and certification services to fenestration manufacturers seeking consistent compliance across the U.S.

Accreditation leverage ISO/IEC 17025 and multiple industry accreditations (AAMA, IGCC/IGMA, SGCC, Miami-Dade, Florida Product Approval) position the lab as a trusted partner for quality assurance and product approvals, enabling cross-sell of testing, simulation, and certification bundles.

Fenestration focus Specialization in windows, doors, skylights, and curtain walls aligns with suppliers and fabricators in the wholesale building materials space who require fast, compliant testing for product launches and performance endorsements.

SMB agility Small to mid-size scale with a focused service portfolio offers a gateway for growth through strategic partnerships, white-label testing programs, and scalable service packages tailored to regional manufacturers seeking cost-effective certification paths.

Growth opportunities Revenue in the lower mid-market range suggests upsell potential to larger firms via expanded service lines such as field testing, installation verification, and simulation-based performance modeling to capture end-to-end testing needs.

National Certified Testing Laboratories, Inc. Tech Stack

National Certified Testing Laboratories, Inc. uses 5 technology products and services including Google Fonts API, Twemoji, jQuery, and more. Explore National Certified Testing Laboratories, Inc.'s tech stack below.

Google Fonts API

Font Scripts

Twemoji

Font Scripts

jQuery

Javascript Libraries

Underscore.js

Javascript Libraries

GoDaddy

Web Hosting

National Certified Testing Laboratories, Inc. Email Formats	Example	Percentage
FLast@nctlinc.com	JDoe@nctlinc.com	91%
FirstL@nctlinc.com	JohnD@nctlinc.com	4%
F.Last@nctlinc.com	J.Doe@nctlinc.com	5%

National Certified Testing Laboratories, Inc. Email Formats

Example

Percentage

FLast@nctlinc.com

JDoe@nctlinc.com

91%

FirstL@nctlinc.com

JohnD@nctlinc.com

F.Last@nctlinc.com

J.Doe@nctlinc.com

Frequently Asked Questions

What is National Certified Testing Laboratories, Inc.'s phone number?

You can contact National Certified Testing Laboratories, Inc.'s main corporate office by phone at

+1-407-240-****

. For more prospecting data, LeadIQ has access to up-to-date and accurate contact information within our platform. Find, capture, and sync contact data to your CRM and sales tools in one click.

What is National Certified Testing Laboratories, Inc.'s official website and social media links?

National Certified Testing Laboratories, Inc.'s official website is nctlinc.com and has social profiles on LinkedIn.

How much revenue does National Certified Testing Laboratories, Inc. generate?

As of August 2026, National Certified Testing Laboratories, Inc.'s annual revenue is estimated to be $1M - $10M.

What is National Certified Testing Laboratories, Inc.'s SIC code NAICS code?

National Certified Testing Laboratories, Inc.'s SIC code is 7389 - Business Services, Not Elsewhere Classified NAICS code is 4233 - Lumber and Other Construction Materials Merchant Wholesalers.

How many employees does National Certified Testing Laboratories, Inc. have currently?

As of August 2026, National Certified Testing Laboratories, Inc. has approximately 25 employees across 2 continents, including North AmericaSouth America. Key team members include Executive Vice President: R. Z.Engineering Services To The Building Products Industry: E. R.Geotechnical Engineering Consultant - Remote: A. R.. Explore National Certified Testing Laboratories, Inc.'s employee directory with LeadIQ.

What industry does National Certified Testing Laboratories, Inc. belong to?

National Certified Testing Laboratories, Inc. operates in the Wholesale Building Materials industry.

What technology does National Certified Testing Laboratories, Inc. use?

National Certified Testing Laboratories, Inc.'s tech stack includes Google Fonts APITwemojijQueryUnderscore.jsGoDaddy.

What is National Certified Testing Laboratories, Inc.'s email format?

National Certified Testing Laboratories, Inc.'s email format typically follows the pattern of FLast@nctlinc.com. Find more National Certified Testing Laboratories, Inc. email formats with LeadIQ.

When was National Certified Testing Laboratories, Inc. founded?

National Certified Testing Laboratories, Inc. was founded in 1977.

National Certified Testing Laboratories, Inc.

Wholesale Building MaterialsPennsylvania, United States11-50 Employees

National Certified Testing Laboratories, Inc. is a wholesale building materials testing firm with facilities in York, PA; Everett, WA; and Orlando, FL. The company provides in-house testing of fenestration products such as windows, doors, skylights, and curtain walls, and also conducts field testing for curtain wall installations. It operates as an approved laboratory for NFRC thermal simulations and CMA, is AAMA accredited, and holds additional approvals from IGCC/IGMA, SGCC, and Miami-Dade and Florida Product Approvals, with ISO/IEC 17025 accreditation. Serving customers in the building products sector, the organization supports product performance verification and code-compliance processes for manufacturers, specifiers, and regulatory bodies. Based in York, Pennsylvania, the business functions across multiple locations to support testing and certification services within the construction materials industry.

Insights

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