What Curbs Plus does

Curbs Plus, Inc. is a U.S. custom metal-fabrication manufacturer founded in 1996 and headquartered in Ringgold, Georgia, that designs and builds roof curbs, transition/adapter curbs, equipment supports, vibration isolation systems, acoustic damping systems, plenum-diffusers, and equipment screens for the commercial and industrial HVAC and metal building markets. The company operates five U.S. manufacturing plants (Ringgold GA HQ, Rossville GA, El Dorado KS, Mount Union PA, Glendale AZ) producing prime G90 galvanized and galvalume steel products with welded watertight construction in 14–18 gauge steel, and operates proprietary product lines including the CPT-1 transition curb, QZAcoustic in-curb acoustic treatment, CPISO vibration isolation curb, CPR isolation rail system, and the NuVue equipment screen line.

Curbs Plus sells almost exclusively direct to commercial and industrial end customers — primarily HVAC and mechanical contractors, metal building manufacturers and erectors, and to a lesser extent building owners and facility managers — through a U.S.-based inside sales team (named reps for conventional and metal roof products) plus an outside sales and Strategic Accounts function. The company differentiates through on-site roof curb verification services, live video call support, 5-day standard build times on adapter curbs, and a stated position as the first metal building roof curb manufacturer to formally join MBMA (January 2021). Revenue is generated on a quote-based, project-by-project basis with no public price list, and the customer roster includes American Buildings, Whirlwind Steel, Captive Aire, Tom Barrow Co, and Conklin Metal Industries.

The business is privately held and founder/co-owner-controlled, with no disclosed institutional investors or follow-on funding rounds since the 1996 seed of $425,000 in pooled capital from the founding group (Marc Brower, Tina Brower, Ken Herrick, Nick Waber, Joan Waber, Jon Steed, Steven Jensen). A significant near-term development is the August 2024 passing of co-owner and President Jon Steed, which creates a leadership transition risk for the otherwise stable, multi-decade founder-owned operation.

Name

Curbs Plus

Legal name

Curbs Plus, Inc.

Website

https://curbs-plus.com

Company type

Private

Founded year

1996

Operating status

Operating

Headcount range

101–250 employees

Short description

Curbs Plus is a U.S. custom metal fabricator (founded 1996, Ringgold GA) that designs and manufactures roof curbs, transition curbs, equipment supports, vibration isolation, and acoustic systems for commercial HVAC contractors and metal building manufacturers, operating five U.S. plants and selling direct via quote-based project pricing.

Ownership category

akta.pro rank

Product category

Roof Curb Manufacturing

NAICS

Asphalt Shingle and Coating Materials Manufacturing (324122)

SIC

Asphalt Paving & Roofing Materials (2950)

akta.pro primary industry

Metal Roofing Systems (IMADAFAB)

Keywords

• Roof curb manufacturing
• HVAC equipment supports
• Metal roof curbs
• Plenum diffusers
• Vibration isolation systems

Headquarters

HQ city

Ringgold

HQ country

United States

HQ region

North America

Offices5 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Manufactured Metal Roof Curbs & Equipment Supports: One-time sale of custom-fabricated metal roof curbs (CPM, CPC, CPES series), adapter/transition curbs (CPT-1), isolation curbs and rails, equipment screens (NuVue), and roof hatches. Products are quote-based and built to specification with materials sourced domestically.
2. Plenum-Diffusers and Concentric Diffusers: One-time sale of HVAC plenum-diffusers (DLPD, LPPD, SFPD, VFPD series) and concentric diffusers (CDR, CDS, CFR, CFS) sized to specific tonnage/CFM requirements; engineered curb and duct packages available.
3. Field Verification & Engineering Services: On-site roof curb verification, adapter selection support, and live video call consultation bundled with curb purchases to ensure fit and reduce costly errors.

Pricing tiers

Go-to-market motion2 records

Distribution channels3 records

Marketing channels5 records

Core offering

Curbs Plus manufactures custom-fabricated metal roof curbs, adapter/transition curbs, equipment supports, and plenum-diffusers for commercial and industrial HVAC and metal building applications. The company produces galvanized/galvalume steel roof curbs (conventional, metal roof, and adapter/transition variants), supply and concentric diffusers, vibration isolation curbs and rails, acoustic dampening systems, equipment screens, and roof hatches across five U.S. manufacturing plants. They also provide on-site roof curb verification services to ensure proper fit.

Product overview

Curbs Plus operates as a specialized manufacturer of rooftop equipment support and transition products for the commercial/industrial HVAC industry, organized as a portfolio of distinct product lines rather than a single unified software platform. The core offering consists of roof curbs (Metal Roof Curbs, Conventional Curbs, and Adapter/Transition Curbs like the CPT-1) that serve as the foundation for mounting rooftop equipment, complemented by Supply Diffusers (DLPD, LPPD, SFPD, VFPD series) and Concentric Diffusers (CDR, CDS, CFR, CFS series) for air distribution. Support and integration modules include Support Systems (Platform Support System, SS-1 Sliding Support System), Equipment Supports (CPES-1/2/3), Isolation Curbs (CPISO), and Isolation Rails (CPR system) for vibration, seismic, and wind control. Additional lines encompass the NuVue Equipment Screen for rooftop equipment enclosure, the QZAcoustic System for in-curb noise reduction, and Roof Hatches for rooftop access. The product portfolio is engineered to integrate with a wide range of third-party HVAC OEMs (e.g., Carrier, Lennox, Daikin, Rheem, Trane, Mitsubishi Electric) and metal building manufacturers (e.g., American Buildings, MBCI, Nucor, Kirby, Behlen).

Differentiator

Problem solved

Functional benefit

Brands

• NuVue: NuVue Equipment Screen line of pre-formed metal panels and framing systems to enclose rooftop mechanical equipment.

Products and services

• Metal Roof Curbs Metal roof curbs designed as frameworks supporting HVAC units, skylights, and other rooftop equipment on commercial and industrial metal buildings. Offered in CPM-1, CPM-3, CPM-5, CPM-7, and CPM-9 variants with different clip configurations for over-over, over-under, and flat flange installations.
• Adapter Curbs (CPT-1 Transition Curb) Transition/adapter curbs used to fit new rooftop units onto existing roof curbs. The CPT-1 arrives ready to install without field assembly, uses heavy gauge G90 prime galvanized steel, is fully insulated, prime-painted, and includes welded lifting lugs. Standard 5-day production build time.
• Conventional Curbs Conventional insulated and non-insulated roof curbs built with 18 ga. prime galvanized steel, fully welded watertight one-piece construction, with pressure treated wood nailers, 1-1/2" thick 3# density fiberglass insulation, and mitered/welded raised 3" cant. Offered in CPC-1, CPC-2, CPC-3, and CPC-4 variants.
• Supply Diffusers Plenum-diffuser systems including DLPD 2-way, 3-way, 4-way, and 6-way Drum Louver Plenum-Diffusers, LPPD Low Profile Plenum-Diffusers, SFPD Slant Face Plenum-Diffusers, and VFPD Vertical Face Plenum-Diffusers. G-90 galvanized steel construction with turning vanes, duct liner, and adjustable drum louvers, available in capacities from 3-ton through 62.5-ton.
• Concentric Diffusers Concentric drop box and flush mount diffusers for lay-in ceiling installation. Includes CDR (round duct, drop box), CDS (square/rectangle duct, drop box), CFR (round duct, flush mount), and CFS (square/rectangle duct, flush mount) variants with aluminum louvered face grilles and double deflection diffusers, available from 3-5 ton through 20 ton capacities.
• Support Systems Roof-mounted equipment support systems including the Platform Support System (with rib-cap strips and clamps matching roof panel, no penetrations required for installation) and the SS-1 Sliding Support System (14 ga. prime galvanized steel construction with hold-down brackets for wind uplift resistance while allowing thermal movement, installable before or after roof panels).
• Equipment Supports Conventional roof equipment supports built with 18 ga. galvanized steel, fully welded one-piece construction with prime paint finish, full-depth internal C-channel reinforcing and 6" spreader channels on 12" centers, pressure treated 2x4 wood nailers, and mitered/welded 3" cant. Offered in CPES-1, CPES-2, and CPES-3 variants.
• Equipment Screens (NuVue Equipment Screen) Pre-formed metal panel and framing system that encloses rooftop mechanical equipment. Attaches to the equipment's roof curb without additional roof penetrations on most installations, with sliding doors for service access, available in 15 standard colors plus custom colors. Made of rigid galvalume metal sheets, minimum 18 gauge G-90 galvanized steel, with stainless steel fasteners and a one-year manufacturing-defect warranty.
• Isolation Curbs (CPISO Vibration Isolation Roof Curb) Prefabricated conventional vibration isolation roof curb. Base curb has 1x4 wood nailer and is designed to allow for reroofing without removing the HVAC unit. Built with 14 ga. galvanized base curb and 12 ga. galvanized top rail.
• Isolation Rails (CPR System) Isolation rails designed to sit between an existing roof curb and curb-mounted equipment to reduce vibration from roof-mounted equipment to the building structure, while also acting as seismic and wind restraints. Available in 1" or 2" deflection depending on requirements, shipped nearly fully assembled with springs and restraints installed.
• Noise Reduction (QZAcoustic System) Curbs Plus's in-curb acoustical treatment for noise transfer reduction from roof-mounted equipment curbs, beneficial for noise-sensitive spaces. Provides greater transmission loss for air handling equipment entering a building than a traditional curb system. Requires no acoustical caulk during installation; available for plenum or non-plenum curbs.
• Roof Hatches Roof hatches with compression spring operators for smooth one-hand operation, automatic hold-open arms, overlapping cover design with welded corners, EPDM rubber gasket, and fully insulated cover for weather-tightness and energy efficiency. Available in multiple sizes and curb configurations, with heavy gauge construction and positive latching mechanism for building security.
• On-Site Roof Curb Verification Service Field verification service where Curbs Plus measures existing roof curbs and identifies obstructions (exhaust fans, walls, roof edges) via photos or in-person visits; includes live video call support for real-time guidance. Bundled with curb purchases to ensure fit and reduce costly errors.

Quantifiable outcome

• 5-day standard production build time on CPT-1 transition/adapter curbs
• +3 more outcomes

Named customers6 records

Segments3 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration40 records

Feature8 records

Partnerships

21 partnerships are on record, tiered flagship, core and minor.

• CarrierflagshipTechnology or IntegrationCarrier is featured in the "Integrates With" section on both the homepage and About page, indicating Curbs Plus products are designed to integrate with Carrier HVAC equipment. Relationship is bidirectional/compatibility-focused.
• DaikinflagshipTechnology or IntegrationDaikin (North America) is listed in the "Integrates With" section, indicating Curbs Plus's curbs and supports are engineered to fit Daikin rooftop HVAC units.
• LennoxflagshipTechnology or IntegrationLennox is featured in the "Integrates With" section, signaling product compatibility with Lennox HVAC systems.
• Mitsubishi ElectricflagshipTechnology or IntegrationMitsubishi Electric is featured in the "Integrates With" section, indicating compatibility with Mitsubishi HVAC and air handling equipment.
• RheemflagshipTechnology or IntegrationRheem is featured in the "Integrates With" section, indicating Curbs Plus products integrate with Rheem HVAC equipment.
• AAONcoreTechnology or IntegrationAAON is listed in the About page "Integrates With" section, indicating product integration with AAON HVAC equipment.
• GoodmancoreTechnology or IntegrationGoodman is listed in the "Integrates With" section, indicating compatibility with Goodman HVAC systems.
• GreenheckcoreTechnology or IntegrationGreenheck is listed in the "Integrates With" section, indicating integration with Greenheck ventilation equipment.
• American BuildingsflagshipTechnology or IntegrationAmerican Buildings is listed in the "Integrates With" section as a metal building partner; also provides a customer testimonial (Cliff).
• Nucor Buildings GroupcoreTechnology or IntegrationNucor Buildings Group is featured in the "Integrates With" section, indicating integration with Nucor metal building systems.
• Cornerstone Building BrandscoreTechnology or IntegrationCornerstone Building Brands is listed in the "Integrates With" section, indicating integration with multiple metal building brands under the Cornerstone umbrella.
• Kirby Building SystemscoreTechnology or IntegrationKirby Building Systems is listed in the "Integrates With" section as a metal building partner.
• Trident (Behlen Group)coreTechnology or IntegrationTrident (Behlen Group) is listed in the "Integrates With" section as a metal building partner.
• Metal Building Manufacturers Association (MBMA)coreOthersCurbs Plus became the first metal building roof curb manufacturer to formally join MBMA in January 2021. MBMA logo appears in the website footer, and the membership is referenced in the news section as a strategic commitment to move the metal building industry forward.
• MBCEAminorOthersMBCEA logo appears in the website footer, indicating trade association membership.
• SCORE InternationalminorGTM or Marketing PartnerCurbs Plus supports SCORE International's global missions through the annual Gary Brower Memorial Golf Classic in Chattanooga. SCORE International was founded in 1984 by Ron Bishop and runs sports ministry and global mission programs.
• Compass360 (360Missions)minorGTM or Marketing PartnerCurbs Plus sponsors Compass360's missions work, including a maize/soybean farming initiative in Chisunka, fundraising for a compound and truck, and a "Pathway" youth camp in October serving 120+ youth aged 13–20.
• Children's of AlabamaminorGTM or Marketing PartnerCurbs Plus is an ongoing partner supporting Children's of Alabama; the partnership is referenced in the news section (October 2022) alongside a Benjamin Russell Hospital for Children image.
• Sean Karl FoundationminorGTM or Marketing PartnerCurbs Plus promotes the Sean Karl Foundation, which raises funds for Ewing Sarcoma research and pediatric cancer awareness (May 2022).
• From Here to Career AcademyminorGTM or Marketing PartnerCurbs Plus partnered with From Here to Career Academy in March 2021, which works with Catoosa County GA high school students to provide college credit, technical college credentials, and professional skills.
• Crossroads Unity Family ParkminorGTM or Marketing PartnerCurbs Plus supports the Building Fund for the Crossroads Unity Family Park (an inclusive playground for all ages with emphasis on Adults with Disabilities), referenced during the 2023 Summer Outdoor Concert sponsorship.

Scale indicators7 records

Recent moves11 records

Expansion highlights5 records

Direct peers

• Thybar Corporation: Thybar is a direct competitor that custom-fabricates metal roof curbs, equipment supports, and accessories for the HVAC and metal building industries. It competes head-to-head with Curbs Plus across conventional, metal-building, and adapter curb categories.
• Custom Curb / Pate Company: Custom Curb (now part of Pate Company) manufactures custom and standard roof curbs, equipment supports, and plenum-diffusers for HVAC and metal building applications — a closely overlapping product portfolio to Curbs Plus's core curbs, supports, and diffuser lines.
• Creative Metals: Creative Metals fabricates custom roof curbs, equipment supports, and metal building accessories for HVAC contractors. Comparable to Curbs Plus as a custom-fabrication competitor in metal roof curbs and rooftop equipment supports.
• Acudor: Acudor manufactures roof hatches, floor doors, and access doors, plus related roof curbs. Curbs Plus also sells roof hatches as a core product, putting Acudor in direct overlap on the rooftop access/curb segment.
• Metal-Era: Metal-Era fabricates engineered roof edge metal, copings, fascia, and related accessories. While it focuses on perimeter metal, the adjacent product category (metal roof accessories) makes it a comparable peer for Curbs Plus's metal roof curb business.

Broad incumbents

• Greenheck Group: Greenheck is one of the largest U.S. manufacturers of ventilation equipment (fans, dampers, louvers) and is a Curbs Plus integration partner. As a much broader incumbent serving the same HVAC contractors and metal building OEMs, it competes for adjacent share of the rooftop equipment package.
• Loren Cook Company: Loren Cook manufactures commercial and industrial fans, blowers, and ventilation equipment, and is also a Curbs Plus integration partner. As a broad incumbent in rooftop air movement, it is comparable to the broader ecosystem Curbs Plus serves, though it does not specialize in roof curbs.
• Twin City Fan & Blower: Twin City Fan & Blower is a leading manufacturer of industrial fans and ventilation equipment and is listed as a Curbs Plus integration partner. As a broad incumbent serving the same HVAC/rooftop ecosystem, it provides a useful scale benchmark even though its core product is fans rather than curbs.
• Activar Construction Products Group (ACP): ACP owns multiple brands (including NCA/National Curb) that fabricate roof curbs, access doors, and related rooftop accessories. As a multi-brand construction products incumbent, ACP is a structural peer to Curbs Plus's combined curb and roof hatch portfolio.

Emerging players

• CaptiveAire Systems: CaptiveAire is one of the largest U.S. commercial kitchen ventilation system manufacturers and is a Curbs Plus customer. While it primarily makes hoods and fans, its growing systems integration work overlaps with Curbs Plus's equipment support and curb business for kitchen ventilation installations.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat6 records

Key risks6 records

Key highlights7 records

Customer concentration

Compliance2 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles9 records

Subsidiaries5 records

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 Curbs Plus