What Structures Unlimited does

Structures Unlimited, Inc. is a privately held, family-owned custom-engineered daylighting systems manufacturer and installer founded in 1968 and headquartered in Bow, New Hampshire. The company designs, engineers, fabricates, and installs translucent aluminum structures — including canopy systems, Clearspan™ skyroofs capable of spans exceeding 100 feet, removable skylights, full building enclosures, and pool/natatorium enclosures — using structural aluminum box-beam framing clad with Kalwall translucent sandwich panels. Its proprietary KCRF™ corrosion-resistant coating and 5-axis CNC precision fabrication (tolerances within .001/meter) underpin a portfolio that serves education, civic and recreation, hospitality and cultural, commercial, infrastructure and transportation, industrial, commercial aquatics, residential pools, and municipal wastewater markets.

The firm operates a single-source business model in which it handles delegated design, daylight modeling, structural engineering across all IBC codes, in-house fabrication at its Bow, NH facility, and installation via OSHA-trained factory crews. Revenue is generated project-by-project on a custom-engineering basis — pricing is not publicly disclosed and varies with span, specification, and installation complexity — delivered through a global direct sales force of technical representatives spanning the United States, Canada, UK, and Mexico. Notable installations include Yankee Stadium's Grand Hall, Dunbar High School, Gerald R. Ford International Airport, Mayo Clinic, and the Scarlet Pearl Casino Resort.

Go-to-market relies on architect and specifier relationships cultivated via AIA/CES accredited continuing education, market webinars, a YouTube channel, a resource library of CAD/BIM families, and project case studies. The company holds three registered trademarks (Clearspan™, KCRF™, Skyroofs®) and maintains a core strategic partnership with Kalwall Corporation for translucent panel supply. With 101–250 employees and no external institutional investors, Structures Unlimited functions as an operator-led niche industrial specialist competing on technical capability, longevity, and single-source accountability rather than scale or automation.

Name

Structures Unlimited

Legal name

Structures Unlimited, Inc.

Website

https://structuresunlimitedinc.com

Company type

Private

Founded year

1968

Operating status

Operating

Headcount range

101–250 employees

Short description

Structures Unlimited is a family-owned U.S. manufacturer and installer founded in 1968 that designs, fabricates, and installs custom-engineered aluminum daylighting structures — canopies, skyroofs, pool enclosures, and building enclosures — for architects, general contractors, and end-owners across education, civic, healthcare, transportation, industrial, and aquatics markets.

Ownership category

akta.pro rank

Product category

Architectural Daylighting Structures

NAICS

Sheet Metal Work Manufacturing (332322), Glass and Glazing Contractors (238150), Roofing Contractors (23816)

SIC

Prefabricated Metal Buildings & Components (3448)

akta.pro primary industry

Skylights, Roof Glazing & Glass Roofing Systems (IMADAHAK)

akta.pro secondary industries

Skylights, Roof Windows & Daylighting (IMADAFAL), Sunrooms, Screen Rooms & Enclosures (HSAPALAF), Architectural & Building Glazing Systems (Curtain Wall/Storefront/Canopies) (IMADAHAB)

Keywords

• Custom daylighting structures
• Translucent wall systems
• Architectural skylights
• Pool enclosures
• Aluminum box beam frames

Headquarters

HQ city

Bow

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, Technology or R&D, Marketing or Sales

Revenue model

1. Custom Daylighting Structures: Project-based revenue from design, engineering, fabrication and installation of custom-engineered daylighting structures including canopies, skyroofs, pool enclosures, and building enclosures. Single-source solution from delegated design to installation.

Go-to-market motion1 record

Distribution channels2 records

Marketing channels7 records

Core offering

Structures Unlimited designs, engineers, fabricates, and installs custom-engineered daylighting structures that combine Kalwall translucent sandwich panels with structural aluminum box-beam systems. The company delivers pre-engineered canopies, clearspan skyroofs, removable skylights, building enclosures, and pool/natatorium enclosures for commercial and institutional building projects.

Product overview

Structures Unlimited provides a single-source solution for custom-engineered daylighting structures, combining energy-efficient Kalwall translucent sandwich panels with structural aluminum box-beam systems. The product portfolio consists of six core product lines: Canopy Systems for building entryways and walkways, Clearspan Skyroofs for monumental daylighting spans exceeding 100 feet, Removable Skylights for industrial access applications, Building Enclosures for complete turnkey structures, and Pool Enclosures/Natatoriums for aquatic environments. All products are supported by a comprehensive service offering that spans from design-assist and daylight modeling through delegated engineering, precision fabrication, and on-site installation. The company has operated since 1968 as a single-source provider, handling every project stage from initial planning through final installation.

Differentiator

Problem solved

Functional benefit

Products and services

• Canopy Systems
• Clearspan Skyroofs
• Removable Skylights
• Building Enclosures
• Pool Enclosures and Natatoriums
• Design-Assist and Daylight Modeling Services
• Delegated Design Engineering Services
• Precision Fabrication and Installation Services

Quantifiable outcome

• Students in classrooms with the most daylighting progressed 20% faster on math tests and 26% faster on reading tests over a year period (Heschong Mahone Group study)
• +3 more outcomes

Named customers15 records

Segments9 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature6 records

Partnerships

Two partnerships are on record, tiered core and minor.

• Kalwall CorporationcoreStrategic or Co-development PartnerStrategic partnership where Kalwall supplies translucent sandwich panels that are combined with Structures Unlimited's structural aluminum box-beam systems. Kalwall panels provide the daylighting component with features including glare-free diffusion, thermal control up to R-20, and various color and grid options. The partnership enables single-source daylighting solutions from design through installation.
• Keller AssociatesminorStrategic or Co-development PartnerListed as a strategic partner in the company's ecosystem, contributing to the collaborative approach for daylighting projects.

Scale indicators3 records

Recent moves7 records

Expansion highlights5 records

Direct peers

• Kalwall Corporation: Manufacturer of translucent sandwich panel daylighting systems and a strategic partner-supplier to Structures Unlimited. Kalwall's own structural skylight and curtain wall systems overlap directly with Structures Unlimited's product lines, making it the closest comparable (and most strategically conflicted) peer.
• Major Industries Inc. Custom-engineered skylights, canopies, and translucent daylighting systems for commercial, institutional, and recreational facilities. Directly competes with Structures Unlimited in custom daylighting structures and clearspan skylight applications.
• CPI Daylighting Inc. Provider of translucent panel skylight and wall systems, including Kalwall-equivalent daylighting products. Directly competes on similar translucent sandwich panel specifications across commercial, educational, and recreational projects.
• Wasco Skylights: Commercial and architectural skylight manufacturer offering custom and standard skylight systems. Comparable on commercial/architectural daylighting, though Wasco leans more toward glazed glass systems than translucent FRP panels.
• Sunoptics: Manufacturer of high-performance prismatic skylights and daylighting systems for commercial and industrial buildings. Targets similar institutional, retail, and warehouse end-uses with prismatic rather than translucent panel technology.
• Duo-Gard Industries: Custom-engineered translucent daylighting systems, canopies, and skylights serving commercial, educational, and transportation markets. Closely comparable in product scope, custom-engineering approach, and architectural project focus.
• Solatube International: Manufacturer of tubular daylighting devices and commercial skylight systems serving residential, commercial, and educational markets. Adjacent peer on daylighting intent though differentiated by tubular device vs. clearspan/canopy product formats.

Broad incumbents

• Kingspan Light + Air: Division of Kingspan Group offering skylights, smoke vents, and daylighting solutions as part of a larger building envelope portfolio. Comparable on daylighting products but operates as part of a much broader construction products conglomerate.
• VELUX Commercial: Global skylight and roof window leader with growing commercial product lines. Comparable on daylighting function and project types, though its scale, residential heritage, and mass-produced model differ materially from Structures Unlimited's custom-engineered approach.

Emerging players

• Natural Light Energy Systems: Manufacturer of tubular skylights and energy-efficient daylighting systems for residential and light commercial applications. Comparable daylighting product category though focused on smaller-scale, lower-cost systems rather than monumental clearspan structures.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat6 records

Key risks6 records

Key highlights7 records

Customer concentration

• YouTubeyoutube.com/channel/UCwp5V_PatKWOEyelp4l_hTA
• LinkedInlinkedin.com/company/structures-unlimited-inc.

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 Structures Unlimited