What Elmdor does

Elmdor Manufacturing Company designs and manufactures access doors, roof hatches, and valve boxes for non-residential construction markets in North America. Founded in 1989 as a division of Acorn Engineering Company and now operating as part of Morris Group International's 23-division conglomerate, the company is headquartered in City of Industry, California, with 11–50 employees. Its product portfolio spans 17+ access panel series — including drywall (DW), fire-rated (FR, FRC, SFI), exterior insulated (ED, EDI), security and vandal-resistant (SLA, SMD, SMP, SLK), behavior-health ligature-resistant (BH), acoustical tile/plaster (AT, AP), covert solid surface (CD), draft-stop (DS), and duct access (DT) — plus VB/SVB valve boxes, the RAH roof hatch series, and configurable lock/latch options. Underlying materials are primarily galvannealed steel with select stainless steel and solid surface applications; fire-rated SKUs carry UL 10B, Warnock Hersey, and CAN/ULC S104 third-party certifications that anchor specification pull in institutional and government work.

The company monetizes through one-time product sales at quote-based pricing, distributed via a network of independent sales representatives (Acorn Thorn, Elmco & Associates, Elmco Stewart, Elmco Silver State, Elmco Swords, Morris Lee, Morris Industries Mexico) and expedited through its Kwik Ship® Brands program of locally stocked, weekly-replenished inventory. Customers span commercial construction, government facilities (hospitals, courthouses, police and fire stations), schools, correctional institutions, and behavioral-health facilities, with code compliance, durability, vandal resistance, and aesthetic integration as primary purchase drivers. Go-to-market is enterprise field sales supported by digital content (MasterSpec listings across 1,700+ sections, BIM/Revit drawings, submittals, installation documentation) and direct quote requests through the company website.

Name

Elmdor

Legal name

Elmdor Manufacturing Company

Website

https://elmdor.com

Company type

Private

Founded year

1989

Operating status

Operating

Headcount range

11–50 employees

Short description

Elmdor Manufacturing Company designs and manufactures access doors, roof hatches, and valve boxes for non-residential construction, serving commercial, government, educational, and correctional facility markets across North America as a division of Morris Group International.

Ownership category

akta.pro rank

Product category

Building Hardware / Access Doors and Panels

NAICS

Metal Window and Door Manufacturing (332321)

SIC

Metal Doors, Sash, Frames, Moldings & Trim (3442)

akta.pro primary industry

Access Panels, Hatches & Specialty Openings (IMADAIAJ)

akta.pro secondary industries

Exterior Doors (IMADAIAA), Interior Doors (IMADAIAB), Windows, Doors & Millwork Distribution (CRAOAFAI)

Keywords

• Access doors
• Roof hatches
• Valve boxes
• Fire-rated panels
• Security access panels

Headquarters

HQ city

City Of Industry

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Operations, Personnel, Marketing or Sales, Infrastructure, Technology or R&D

Revenue model

1. Access Doors and Panels: Manufacture and sale of various access door series including drywall, fire-rated, security, and specialty access panels. One-time product sales with standard pricing available via quote.
2. Roof Hatches: Roof access hatch products including the RAH series for commercial and industrial building applications.
3. Valve Boxes: Surface-mounted and recessed valve boxes for accessing valves concealed in walls.
4. Lock and Latch Options: Various latching options and accessories including cylinder locks, T-handles, and mortise lock preps.
5. Custom Products: Custom-made products to virtually any specification as part of Morris Group International network.

Pricing tiers

Go-to-market motion1 record

Distribution channels1 record

Marketing channels6 records

Core offering

Elmdor Manufacturing Company designs and manufactures access doors, roof hatches, and valve boxes fabricated primarily from galvannealed steel, stainless steel, and solid surface materials. The portfolio spans drywall, fire-rated, exterior, security, behavior-health, duct, acoustical tile/plaster, covert, and specialty access panels, plus roof access hatches and recessed/surface valve boxes for non-residential commercial, institutional, government, and healthcare construction markets. Products are made in North America and sold via an independent sales representative network, custom engineering services, and the Kwik Ship in-stock quick-delivery program.

Product overview

Elmdor Manufacturing Company designs and manufactures access doors, roof hatches, and valve boxes for non-residential construction. The product portfolio centers on four main categories: (1) Access Panels comprising 17 distinct product series including DW Series drywall doors, FR/FRC Series fire-rated panels (wall-only and wall/ceiling), ED/EDI Series exterior insulated doors, SLA/SMD/SMP Series security doors (high vandal resistance, medium security, and medium security prepped), SLK Series Shur-Lok doors, SFI Series security fire-rated insulated doors, BH Series behavior health ligature-resistant doors, DS Series draft stop doors, DT Series duct access doors, CD Series covert solid surface doors, CFR Series ceiling fire-resistant doors, AT/AP Series acoustical tile and plaster doors, and DWB Series drywall bead doors; (2) Valve Boxes including VB Series recessed and SVB Series surface-mounted boxes; (3) Roof Hatches featuring the RAH Series galvanized steel roof access hatch; and (4) Options including various latches, locks, and mounting accessories. Products are manufactured in North America with materials including galvannealed steel, stainless steel, and solid surface, serving institutional (schools, prisons), commercial, government, and healthcare markets. The company also offers custom product design services and Kwik Ship-branded quick-delivery items.

Differentiator

Problem solved

Functional benefit

Brands

• Kwik Ship® Brands: A product program featuring standardized items that are stocked locally, replenished weekly, and available for quick delivery, ensuring minimal delay for customers. Products include DW Series Drywall Access Panels, FR Series Fire-Rated Wall Access Panels, and FRC Series Fire-Rated Ceiling/Wall Access Panels.

Products and services

• DW Series Drywall Access Doors Standard drywall access panels with 16-gauge galvannealed steel construction, white prime coat finish, rounded safety corners, concealed piano hinge, and screwdriver-operated latch; available in sizes from 6x6 to 30x72 inches, with heavy-duty DW14 version. Designed for non-residential commercial construction contractors and drywall installers.
• FR Series Fire-Rated Access Panels for Walls Fire-rated access doors designed for wall-only installation, featuring 16-gauge galvannealed steel fabrication, prime coat finish, and recessed exterior latch operated via ring attached to sliding bolt. Rated 1-1/2 hours by UL and 2 hours by CAN/ULC S104. Designed for institutional and commercial construction requiring code-compliant fire-rated wall assemblies.
• FRC Series Fire-Rated Access Panels for Walls & Ceilings Fire-rated access doors for ceiling and wall installation featuring 20-gauge galvannealed steel door with 2-inch fire-rated insulation, 16-gauge frame with masonry anchors, and self-latching bolt with interior release. Rated 1-1/2 hours by UL, 3 hours by Warnock Hersey for ceilings, 2 hours for walls. Targeted at commercial contractors and institutional specifiers needing code-compliant ceiling/wall access.
• ED Series Exterior Door for Walls and Ceilings Exterior access doors with 16 gauge galvannealed steel frame and panel, prime coat finish, 1-inch thick rigid foam insulation, concealed hinge with dual-purpose latch operated by knurled knob or flush key. Weather-resistant with neoprene gasket. Designed for commercial building exteriors, soffits, and ceiling-exterior assemblies requiring insulation and weather sealing.
• EDI Series Exterior Insulated Door Insulated exterior access doors with internal release latch enabling operation from inside, featuring 16 gauge galvannealed steel construction, 1-inch foam insulation, neoprene gasket on four sides, and exterior lock with threaded ring latch or key operation. Designed for exterior commercial and institutional applications requiring inside-release safety and weather resistance.
• SLA Series Slammer Access Doors High vandal-resistant security access doors featuring 10-gauge steel door, 0.1875x2x2 inch angle steel frame, vandal-resistant lock, heavy-duty hinges, and seamless welded construction. Designed for abusive and vandal-prone institutional conditions in schools, correctional facilities, and public buildings.
• SMD Series Medium Security Doors Medium security access doors with 12-gauge galvannealed steel construction, white prime coat finish, rounded safety corners, concealed pivoting rod hinge, and one-piece frame with allen head latch. Designed for detention centers, psychiatric institutions, and schools requiring moderate security access.
• SLK Series Shur-Lok Access Doors Security access doors featuring 14-gauge galvannealed steel construction, 16-gauge vertical reinforcement channel, concealed hinge, and automatic locking springbolt lock. Designed for drywall, masonry, or concrete in schools, hospitals, hotels, and correctional institutions.
• SFI Series Security Fire-Rated Insulated Access Door UL-listed security fire-rated insulated access doors combining heavy-duty spring closures, 14-gauge galvannealed steel door with 2-inch insulation, and 16-gauge frame with dual-purpose lock. Rated 1-1/2 hours by UL, 3 hours by Warnock Hersey for ceilings, 2 hours for walls. Designed for high-security institutional settings requiring both fire protection and vandal resistance.
• BH Series Behavior Health Access Doors Ligature-resistant access doors fabricated from 16 gauge type 304 stainless steel with satin finish or white powder coat, featuring cam and cylinder locks with concealed hinge allowing 150-degree opening. Designed to reduce possibility of use as suicide apparatus. Targeted at behavioral health facilities, psychiatric institutions, and hospitals.
• DS Series Draft Stop Access Door Non-fire-rated access doors designed for draft-stop spaces in attics, preventing backdraft between attic sections. Features 16-gauge galvannealed steel construction, one-piece frame, concealed pivoting rod hinge, and knurled knob latch. Available in 9 standard sizes. Targeted at residential and light-commercial attic draft-stop applications.
• DT Series Duct Access Doors Duct-mounted access doors with 24 gauge galvanized steel construction, 1-inch double-wall insulated door, knock-over edges for duct attachment, continuous piano hinge, and self-tightening cam latch. Designed for HVAC contractors needing access to commercial building ductwork.
• CD Series Covert Access Door Solid surface ceiling access doors designed to blend seamlessly with gypsum ceilings, featuring tapered edges for joint tape application. ANSI/CPA SS-1 certified solid surface material in OCC11M Blanco Matte color. Lightweight and crack-resistant. Designed for architects and contractors needing concealed access in finished ceilings.
• CFR Series Ceiling Fire Resistant Access Doors Ceiling access doors designed for use in suspended drywall ceiling fire-rated assemblies. Features 16 gauge steel frame and 18 gauge steel door, recessed 1.5 inches to accommodate ceiling tile. Not fire-rated itself but maintains fire-resistant ceiling assembly quality. Targeted at commercial ceiling contractors and architects specifying fire-rated suspended drywall assemblies.
• AT Series Acoustical Tile Access Doors Access doors designed for acoustical tile or gypsum board walls and ceilings, featuring 16 gauge door and 12 gauge frame galvannealed steel construction. Door recessed 5/8 inch to accept acoustical tile or gypsum board and install flush virtually concealed. Designed for commercial and institutional architects specifying concealed access in acoustical tile ceilings.
• AP Series Acoustical Plaster Access Doors Access doors designed for plaster construction with 16 gauge galvannealed steel construction, recessed 0.625 inches and lined with metal lath. Features 3-inch wide metal lath on frame for plaster finish application, concealed hinge, and screwdriver latch. Targeted at plaster contractors and architects working on plaster-finished walls and ceilings.
• SMP Series Medium Security Prepped Access Door Medium security access doors prepped for mortise cylinder lock, featuring 12-gauge galvannealed steel construction, white prime coat finish, continuous concealed piano hinge, and mortise cylinder lock prep as standard. Designed for detention centers, behavioral health facilities, and schools.
• DWB Series Drywall Bead Access Panels Drywall bead access panels with 16-gauge galvannealed steel construction, featuring drywall bead on frame allowing joint compound application, concealed pivoting rod hinges, and screwdriver-operated latch. Designed for flush installation in drywall surfaces by drywall contractors and finishers.

Quantifiable outcome

• Thousands of access doors ready to ship immediately
• +2 more outcomes

Named customers5 records

Segments4 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature7 records

Partnerships

One partnership is on record.

• Morris Group InternationalcoreStrategic or Co-development Partner · 1 January 1989Elmdor Manufacturing Co. was founded in 1989 as a division of Acorn Engineering Company and is now a division of Morris Group International, leveraging a vast network of experience and expertise across 23 plumbing and drainage divisions.

Scale indicators4 records

Recent moves5 records

Expansion highlights4 records

Direct peers

• JL Industries: JL Industries (part of Activar Construction Products Group) manufactures access panels, roof hatches, and fire-rated/fire-protection products for commercial construction. Comparable product mix and institutional customer overlap with Elmdor.
• Nystrom: Nystrom manufactures access doors, roof hatches, floor doors, and smoke vents for commercial construction. Overlaps directly with Elmdor's access panel and roof hatch lines and serves the same non-residential specification-driven market.
• Karp Associates: Karp is a long-established manufacturer of access doors, roof hatches, and floor doors for institutional and correctional markets. Comparable to Elmdor's security, fire-rated, and behavioral health product lines.
• Babcock-Davis: Babcock-Davis is a manufacturer of access doors, roof hatches, floor doors, and smoke vents serving commercial and institutional buildings. Directly competes with Elmdor across fire-rated, security, and standard access panel SKUs.
• Acudor Products: Acudor is a U.S. manufacturer of access doors and panels for walls, ceilings, and roofs, including fire-rated, security, and specialty series. Directly comparable to Elmdor across product categories, materials (galvannealed/stainless steel), and institutional customer base.
• Williams Brothers Corporation of America: Williams Brothers manufactures access doors and panels for commercial and institutional buildings, including security, fire-rated, and exterior series. Directly comparable to Elmdor on product category and channel.

Regional players

• Cendrex: Cendrex is a Canadian-based manufacturer of access doors and panels for drywall, plaster, masonry, and fire-rated applications. Comparable product range to Elmdor, but with primary focus on the Canadian and select North American markets.

Broad incumbents

• MIFAB: MIFAB is a broader manufacturer of plumbing, drainage, and access products including access doors and roof hatches. Larger and more diversified than Elmdor, with overlapping access product lines but a much wider portfolio.

Others

• Potter-Roemer: Potter-Roemer is a sister division within Morris Group International that manufactures fire protection equipment (cabinets, extinguishers, valves). Comparable as a Morris Group peer and adjacent in fire-rated building products, but not a direct access door competitor.
• Acorn Engineering Company: Acorn Engineering is Elmdor's original parent company and a Morris Group division manufacturing stainless steel plumbing fixtures. Sister-company relationship; comparable in materials and institutional customer base, though not a direct competitor in access doors.

Market position

Strengths1 record

Weaknesses5 records

Competitive moat4 records

Key risks5 records

Key highlights7 records

Customer concentration

• Instagraminstagram.com/ElmdorMfgCo
• Xx.com/ElmdorMfgCo
• Facebookfacebook.com/elmdormfgco
• LinkedInlinkedin.com/company/elmdor

Compliance3 records

Revenue estimate

Valuation estimate

Number of profiles

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Elmdor