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NAICS Code· 238310

NAICS 238310: Drywall and Insulation Contractors

This industry comprises establishments primarily engaged in drywall, plaster work, and building insulation work. Plaster work includes applying plain or ornamental plaster, and installation of lath to receive plaster. The work performed may include new work, additions, alterations, maintenance, and repairs. Establishments primarily engaged in providing firestop services are included in this industry. Illustrative Examples: Acoustical ceiling tile and panel installation Lathing contractors Drop ceiling installation Plastering (i.e., ornamental, plain) contractors Drywall contractors Soundproofing contractors Firestop contractors Fresco (i.e., decorative plaster finishing) contractors Taping and finishing drywall Gypsum board installation Wall cavity and attic space insulation installation Cross-References. Establishments primarily engaged in--Show more

NAICS 238310 – Drywall and Insulation Contractors covers specialized construction services involving the installation of interior wall and ceiling systems, including gypsum board, metal framing, acoustic and fire-rated assemblies, and thermal, acoustic, and moisture-resistant insulation materials. This sector plays a critical role in the building envelope and interior finish phases of federal construction projects, supporting compliance with energy efficiency standards, fire codes, and indoor air quality requirements.

323
Active Contracts
$6.8M
Total Obligations (12mo)
78
Awarded Contracts (12mo)
43
Contractors Awarded (12mo)
1
Median Bidders per Award
+16.1%
YoY Growth

Industry Spending Overview

Federal obligations, top contractors and agencies, and related industry codes for NAICS 238310.

AI Industry Description

NAICS 238310 – Drywall and Insulation Contractors covers specialized construction services involving the installation of interior wall and ceiling systems, including gypsum board, metal framing, acoustic and fire-rated assemblies, and thermal, acoustic, and moisture-resistant insulation materials. T...

NAICS 238310 – Drywall and Insulation Contractors covers specialized construction services involving the installation of interior wall and ceiling systems, including gypsum board, metal framing, acoustic and fire-rated assemblies, and thermal, acoustic, and moisture-resistant insulation materials. This sector plays a critical role in the building envelope and interior finish phases of federal construction projects, supporting compliance with energy efficiency standards, fire codes, and indoor air quality requirements. Contractors in this category often work under prime construction firms or as direct subcontractors on military barracks, VA medical facilities, federal office buildings, and correctional institutions, delivering precision work that impacts building performance and occupant comfort. The work requires technical expertise in material compatibility, seismic bracing, and code-compliant detailing, making it a high-reliability niche within the broader federal construction supply chain. Top contractors in this space include AAECON GENERAL CONTRACTING LLC, VSGI LLC, ONEILL CONTRACTORS INC, and BHPE LLC, a mix of medium-sized specialized firms and small businesses with proven track records in federal retrofit and new construction projects. These firms typically operate as direct subcontractors or as small business set-aside performers, leveraging niche certifications and regional presence to secure repeat work across multiple federal regions. Primary federal buyers include the Department of Defense, Department of Veterans Affairs, Department of Labor, Department of Justice, and Department of the Interior, with demand driven by facility modernization, energy conservation initiatives, and infrastructure upgrades at military bases, veterans’ hospitals, and federal administrative sites. The U.S. Coast Guard’s Resolute also appears as a key recipient, reflecting broader maritime and coastal facility investment. The market is moderately competitive, with opportunities concentrated in regions with high concentrations of federal infrastructure. Contractors with expertise in sustainable insulation systems, fire-rated drywall assemblies, and LEED-aligned installation practices are well-positioned to capture recurring work. Procurement trends favor experienced firms capable of managing tight schedules and stringent compliance requirements in occupied or sensitive environments.

Small Business Size Standard

The SBA threshold that decides who can bid NAICS 238310 work as a small business.

$19.0M
Applies to the whole industry code

The SBA cap for this NAICS (13 CFR 121.201). A business at or under it can self-certify as small for work in this code, which is what makes it eligible for a small-business set-aside. The cap is set per NAICS, so the same company can be small in one code and not in another.

13 CFR 121.201, effective January 1, 2026. The SBA revises the table roughly once a year.

Top Contractors

Companies with the highest total award value under NAICS 238310, ranked by dollars won.

Top Agencies

Federal agencies directing the most contract spending toward NAICS 238310.

Department Of Defense46 awards$3.7M
249-NETWORK Contract Office 9 (36C249)1 award$1.8M
Department Of Justice5 awards$697K
W6QK Lad Contr Office1 award$200K
Department Of Veterans Affairs2 awards$93K
Department Of State5 awards$82K
Department Of Transportation2 awards$68K
General Services Administration8 awards$56K
DLA Troop Support1 award$47K
US Army Engineer District Walla Wal1 award$37K

Competition

How many companies historically bid on federal awards in NAICS 238310, from bidder counts reported on USAspending.

Usually Single-Bid

Half or more of reported awards drew exactly one bidder, usually a sign of incumbent-held work rather than an open field. · 4,326 reported awards

Median Bidders

1

Per reported award, all-time

Single-Bid Awards

52%

Share of reported awards with one bidder

10+ Bidder Awards

2%

Share of reported awards with 10+ bidders

Reported Awards

4,326

83% of 5,218 total awards

Bidder Count Distribution by Fiscal Year

Share of reported awards in each bidder-count bracket per federal fiscal year.

How this code compares up the NAICS hierarchy. Parent cohorts pool every code under their prefix, so they are the steadier baseline when a 6-digit sample is thin.

Industry FamilyCompetitionMedian BiddersSingle-BidBidder MixReported Awards
238310This Code
Drywall and Insulation Contractors
Usually Single-Bid152%
4,32683% of 5,218
23831NAICS Industry
Usually Single-Bid152%
4,32683% of 5,218
2383Industry Group
Building Finishing Contractors
Fewer Bidders237%
83,27989% of 93,510
238Subsector
Fewer Bidders245%
453,12790% of 505,706
23Sector
Construction
Fewer Bidders240%
1,132,66189% of 1,275,170

Bidder counts reported on past federal awards in this NAICS (USAspending). An open opportunity has no bidders yet, so this is the historical norm for similar work, not a fact about this solicitation. Not all awards report bidder counts, and fewer bidders often means incumbent-held work rather than an easier win. Federal reporting of bidder counts fell from ~96% of awards (FY2016) to ~30% (FY2018 onward); the chart shows shares of reported awards, and washed-out stretches mark years with fewer than 30 of them.

Related NAICS Codes

Industries similar to Drywall and Insulation Contractors, by shared sector, subsector, and industry group.

Explore contracts across multiple NAICS codes Browse all NAICS Codes

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NAICS 238310 FAQ

Frequently Asked Questions

NAICS code 238310 covers Drywall and Insulation Contractors. This industry comprises establishments primarily engaged in drywall, plaster work, and building insulation work. Plaster work includes applying plain or ornamental plaster, and installation of lath to receive plaster. The work performed may include new work, additions, alterations, maintenance, and repairs. Establishments primarily engaged in providing firestop services are included in this industry. Illustrative Examples: Acoustical ceiling tile and panel installation Lathing contractors Drop ceiling installation Plastering (i.e., ornamental, plain) contractors Drywall contractors Soundproofing contractors Firestop contractors Fresco (i.e., decorative plaster finishing) contractors Taping and finishing drywall Gypsum board installation Wall cavity and attic space insulation installation Cross-References. Establishments primarily engaged in--

Recently Posted in Drywall and Insulation Contractors

NAICS: 238310
New
International
Thermal Insulation Project, Halifax Campus
Solicitation # DAL2026-24340568
Dalhousie University is soliciting bids for the Thermal Insulation Project, which involves general construction work within the utility service tunnels across the Studley and Carlton campuses in Halifax, Nova Scotia. This lump sum contract, governed by CCDC 2-2020 and associated supplementary conditions, requires the successful bidder to perform all work between November 30, 2026, and a substantial completion date of March 31, 2027. The project is managed by the Facilities Management department, and the award will be granted to a single bidder based on the Schedule of Prices. Bidders must submit their proposals electronically via the designated bidding system by October 28, 2026, at 2:00 PM local time. Required submission components include a stipulated price, a mandatory cost breakdown attachment, and a digital agreement to bond. Contract security must be provided in the form of a performance and labour and materials bond, a certified cheque draft, or an irrevocable standby letter of credit, with bonds valued at no less than 50 percent of the total tendered price annually. The contractor is responsible for maintaining site cleanliness, adhering to WHMIS legislation for substance labeling, and following strict safety and insurance requirements. This includes providing a current insurance certificate naming Dalhousie University as the insured, a letter of good standing from the Nova Scotia Workers Compensation Board, and COR safety certification. Invoicing must be processed electronically through the DalBuy Jaggare eProcurement portal and must include the university purchase order number and the vendor's HST registration number.
Dalhousie University

POSTED

6 days ago

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