Marlyn Steel Decks

What Marlyn Steel Decks does

Marlyn Steel Decks, Inc. is a family-owned and operated U.S. manufacturer of cold-formed structural steel decking, headquartered at 6808 Harney Road in Tampa, Florida, and continuously operating since 1964. The company produces roof deck profiles (B-Deck at 1.5-inch rib height, deeper N-Deck at 3-inch depth for longer spans, slot-vented roof deck, and acoustical deck with perforations for sound attenuation), floor deck systems (composite floor deck engineered to bond with concrete via embossments, non-composite stay-in-place form deck, and Marcore — a proprietary dovetail-profile composite deck with a flat architectural soffit designed for exposed ceilings), plus deck accessories (pour stops, girder fillers, closure plates, fasteners) and, through the related Marlyn Metals brand, metal roofing, siding, and trim. Products carry SDI certification, FM Approval, UL fire ratings of one to three hours, and an IAPMO evaluation report, qualifying them for fire-rated assemblies in healthcare, commercial, industrial, and institutional construction.

The business runs a direct, project-quoted go-to-market: inside sales representatives handle inbound quote requests via phone (813-621-1375), fax, and a website quote request form where customers upload drawings; pricing is per-square-foot and varies by profile, gauge thickness, coating (galvanized G60/G90 or painted), quantity, and shipping distance, with steel spot prices and freight (full truckload economics, cut charges under 8 feet) materially affecting every quote. Customer segments are organized by vertical — hospitals/healthcare, commercial offices and retail, industrial and warehouse, educational institutions, hospitality/multi-family, and roof repair/retrofit — with the company explicitly marketing to engineers, contractors, architects, and building owners nationwide.

Revenue is generated almost entirely from one-time product sales of manufactured steel deck and related metal building products, with no subscription, recurring, or service component. The company maintains an SEO-oriented educational blog as its primary top-of-funnel channel, a bilingual English/Spanish website, and no disclosed app, API, or software surface. Marlyn is privately held with no parent company, no institutional investors, no funding rounds, no M&A activity, and no publicly disclosed leadership roster beyond the founding family.

Name

Marlyn Steel Decks

Legal name

Marlyn Steel Decks, Inc.

Website

https://marlynsteel.com

Company type

Private

Founded year

1964

Operating status

Operating

Headcount range

1–10 employees

Short description

Marlyn Steel Decks, Inc. is a family-owned Tampa, Florida manufacturer, operating since 1964, of cold-formed structural steel roof and floor deck systems — including its proprietary Marcore dovetail deck — serving contractors, engineers, and building owners across U.S. commercial, healthcare, industrial, and institutional construction via project-based direct sales.

Ownership category

akta.pro rank

Product category

Structural Steel Deck Manufacturing

NAICS

Plate Work and Fabricated Structural Product Manufacturing (33231), Sheet Metal Work Manufacturing (332322)

SIC

Fabricated Structural Metal Products (3440), Sheet Metal Work (3444)

akta.pro primary industry

Steel Joists, Joist Girders & Decking (IMADACAC)

akta.pro secondary industry

Metal Cladding, Soffits & Trim (Non-Panel Components) (IMADACAM)

Keywords

• Steel roof decks
• Composite floor decks
• Steel deck manufacturing
• Structural metal decking
• Dovetail deck systems

Headquarters

HQ city

Tampa

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Personnel, Operations, Infrastructure, Marketing or Sales

Revenue model

1. Steel Deck Product Sales: The company manufactures and sells steel roof decks, floor decks, and related metal building products directly to contractors, engineers, and builders. Products include composite deck, form deck, roof deck, dovetail deck (Marcore), metal roofing, siding, trim, and accessories. Revenue is generated through one-time product sales with quote-based pricing determined by profile, gauge, coating, quantity, and shipping.

Pricing tiers

Go-to-market motion1 record

Distribution channels2 records

Marketing channels3 records

Core offering

Marlyn Steel Decks manufactures and sells cold-formed structural steel roof decks, composite floor decks, form decks, and proprietary dovetail (Marcore) decking to commercial and industrial construction contractors, engineers, and builders. The company also produces related metal building envelope products including metal roofing, siding, trim, and accessories, with custom cut-to-length fabrication for projects nationwide.

Product overview

Marlyn Steel Decks is a family-owned steel deck manufacturer since 1964, offering a portfolio of structural steel deck products for commercial and industrial construction. The core product line spans three categories: (1) Roof deck products including standard B Deck (1.5-inch deep), N Deck (3-inch deep for longer spans), slot-vented roof deck, and acoustical deck; (2) Floor deck products including Composite Floor Deck (designed for composite action with concrete), Form Deck (stay-in-place non-composite form), and Marcore Dovetail Deck (composite deck with architectural flat-soffit appearance); and (3) Metal building envelope products including metal roofing, siding, trim, and accessories. Accessories such as pour stops, girder fillers, closure plates, and fasteners are provided to complete installations. The related company Marlyn Metals handles metal roofing beyond the deck product line.

Differentiator

Problem solved

Functional benefit

Brands

• Marcore: A dovetail-style composite deck with a flat soffit that creates a clean, modern ceiling appearance when left exposed. Engineered with a sleek dovetail profile for exceptional structural performance and architectural design flexibility.

Products and services

• Steel Roof Deck Structural steel roof deck panels used as the base for commercial roofing systems, spanning across joists or beams and supporting insulation boards and roofing membranes. Sold to commercial and industrial construction contractors.
• Form Deck Stay-in-place metal form that supports wet concrete during pouring and remains after curing; the concrete slab independently carries the structural load without composite action. Sold to commercial contractors for floor construction.
• Composite Floor Deck Floor decking engineered with embossments or formed shapes to bond with poured concrete, creating composite action where steel and concrete share the structural load as a unified system. Sold to commercial construction contractors.
• Marcore Dovetail Deck Proprietary dovetail-profile composite deck with a flat soffit, combining composite structural action with a clean, plank-like architectural appearance suitable for exposed ceiling designs. Used in hotels, condominiums, and architectural commercial projects.
• N Deck Deeper steel roof deck profile (3-inch depth) designed for longer spans and greater load capacity than standard B Deck. Used in larger commercial and industrial buildings with wider bay spacing.
• Slot-Vented Roof Deck Steel roof deck with vented slots allowing air circulation, used in roof applications requiring ventilation.
• Acoustical Decks Steel deck designed with perforations and sound-absorbing material to reduce sound levels inside buildings, used in schools, gymnasiums, auditoriums, churches, and offices where sound control is important.
• Metal Roofing Metal roofing panels, including standing seam and exposed fastener systems, manufactured by the related company Marlyn Metals. Complements the steel deck product line for complete building envelope solutions.
• Deck Accessories Supporting components including pour stops, girder fillers, closure plates, flat plates, column closures, foam closures, and fasteners required to complete steel deck installations for roof and floor systems.

Quantifiable outcome

• Steel deck typically outlasts traditional materials like wood once installed inside a building
• +3 more outcomes

Segments6 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature3 records

Scale indicators2 records

Recent moves5 records

Expansion highlights5 records

Broad incumbents

• Steel Dynamics Inc. Steel Dynamics is a major U.S. flat-rolled and structural steel producer whose fabrication group competes across multiple structural metal product categories. Relevant as a competitor and as a raw steel supplier to Marlyn.
• Kingspan Group: Kingspan is a global building envelope manufacturer with U.S. insulated metal panel and deck offerings. Comparable as a broad incumbent in the cold-formed metal building components category, though with a stronger international presence and product line breadth.
• Nucor Corporation: Nucor is the largest U.S. steel producer and the parent of Vulcraft (deck/joist) and other structural steel products. While Marlyn is only directly competitive through Vulcraft, Nucor's vertical integration and scale represent the competitive ceiling for steel deck pricing.

Direct peers

• Epic Metals Corporation: Epic Metals produces composite floor deck, roof deck, and acoustic deck products with proprietary long-span profiles. Comparable to Marlyn in targeting commercial and institutional buildings with engineered deck solutions.
• ASC Steel Deck: ASC Steel Deck manufactures a full line of steel roof and floor deck products, including deep-rib and dovetail profiles, and competes head-to-head with Marlyn in commercial construction specifications. Similar size, similar product breadth, similar certification profile.
• Canam Steel Corporation: Canam manufactures steel joists, steel deck, and other structural components for the building construction industry. Directly competitive with Marlyn in roof and floor deck products for non-residential construction.
• Corrugated Metals Inc. Corrugated Metals manufactures roll-formed steel decking, roofing, and related products for commercial construction. Smaller, single-site manufacturer with similar product mix to Marlyn, including custom profiles.
• New Millennium Building Systems: New Millennium is a steel joist and deck manufacturer producing composite floor deck, roof deck, and deep-rib profiles for commercial construction. Directly comparable to Marlyn in product mix and customer base.
• Vulcraft (Nucor): Vulcraft is the largest U.S. steel joist and deck manufacturer, a division of Nucor. It directly competes with Marlyn Steel Decks in composite floor deck, roof deck, and form deck products for commercial construction, with nationwide manufacturing and vertically integrated steel supply.
• Verco Decking: Verco is a long-established steel deck manufacturer offering roof, floor, form, and composite decks with proprietary profiles like PunchLok and HSN. Directly comparable to Marlyn in product range, customer base (engineers/contractors), and go-to-market model.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat3 records

Key risks6 records

Key highlights7 records

Customer concentration

Compliance4 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 Marlyn Steel Decks