What Karp Associates does

Karp Associates, Inc. is a privately held U.S. manufacturer of access doors, floor doors, and roof hatches headquartered at 260 Spagnoli Road, Melville, New York. Founded in the late 1950s to early 1960s as a small-batch 'job shop,' the company now operates 15+ product lines spanning fire-rated assemblies, concealed drywall doors, exterior and air/water-tight doors, security and anti-ligature doors, acoustical doors, duct doors, valve boxes, floor doors and roof hatches. Customers are commercial and residential construction trades (contractors, architects, builders), served exclusively through an authorized distributor network with quote-based pricing.

The company manufactures 100% of its products in the USA at the Melville facility. Production is anchored by a Robotics Department with three robotic manufacturing cells that produce over 75% of all doors at rates 400-500% faster than manual manufacturing, enabling a 72-hour turnaround on custom orders. Finishing is delivered through a customized electrostatic powder paint system approved by the EPA, which contains no solvents and emits no toxic fumes, supporting LEED-credit eligibility for construction projects. Product breadth (15+ lines) and deep category specialization distinguish Karp from generic hardware suppliers.

Revenue is generated through one-time sales of physical access-door products routed through authorized building-materials distributors, with all pricing transacted via distributor quotes rather than direct purchase. The company has been led by President Burt Gold since its founding era, operates without disclosed institutional investors, and markets itself as the 'world's #1 access door manufacturer' with 75+ years of category presence. Recent strategic emphasis has been on concealed-design product launches (e.g., KAD Aluminum Drywall Access Door), LEED / EPA positioning, and channel-supported U.S. distribution rather than geographic expansion or direct-to-customer commerce.

Name

Karp Associates

Legal name

Karp Associates, Inc.

Website

https://karpinc.com

Company type

Private

Founded year

1960

Operating status

Operating

Headcount range

1–10 employees

Short description

Karp Associates is a privately held U.S. manufacturer of access doors, floor doors, and roof hatches, serving commercial and residential construction through an authorized distributor network from its single Melville, New York facility using robotic production.

Ownership category

akta.pro rank

Headquarters

HQ city

Melville

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Access Door Products: Karp Associates generates revenue through the manufacture and sale of access doors, floor doors, and roof hatches. Products are sold through authorized distributors to contractors, architects, and builders. The company sells physical products with transaction-based pricing requiring quotes for specific project needs.

Pricing tiers

Go-to-market motion1 record

Distribution channels1 record

Marketing channels3 records

Core offering

Karp Associates manufactures and sells access doors, floor doors, and roof hatches for walls, ceilings, floors, and roofs in commercial and residential construction. Products are sold exclusively through authorized distributors to contractors, architects, and builders, with quote-based project pricing. The company offers 15+ product lines including fire-rated, concealed, exterior, security, acoustical, anti-ligature, air/water tight, tile, plaster, duct, valve box, floor, and roof access solutions, all manufactured 100% in the USA using robotic production with 72-hour custom turnaround.

Product overview

Karp Associates is a manufacturer of access doors, floor doors, and roof hatches for commercial and residential construction applications. The product portfolio consists of multiple distinct product lines including Fire Rated Access Doors (KRP-150FR, KRP-250FR, KRP-350FR, KRP-450FR) for walls and ceilings with various fire ratings; Standard Access Doors (DSC-214M, SM, KDW, PF, HA) for general purpose applications; Concealed Access Doors (FG, FGH, KAD, CDW, RDW, RDWPD) designed for seamless blending into walls and ceilings; Exterior Access Doors (MX, MXPL) engineered for outdoor exposure; Specialty Access Doors (STC acoustical, KSTDW, KSTC, KSTE sesame ceiling hatches, KAL anti-ligature); Security Access Doors (DSB-123SD high security, DSB-123SD-MS medium security); Air & Water Tight Access Doors (KAWT); Tile and Plaster Access Doors (DSC-210, KATR, DSC-214PL, DSC-210PL); Floor Doors (KAFA, KFD-SD, KFD-HD) for concrete applications; Roof Hatches (KRHG galvanized, KRHA aluminum); Duct Doors (KHD, KCD); and Valve Boxes (KRVB, KSMB). All products are manufactured 100% in the USA using robotic manufacturing with 3 robotic cells producing 75% of output.

Differentiator

Problem solved

Functional benefit

Products and services

• KRP-150FR Fire Rated Access Door Insulated fire-rated access door for walls and ceilings, rated 1.5 hour 'B' label in walls and 3 hours in ceilings by Warnock Hersey; for contractors and architects needing code-compliant concealed access.
• KRP-250FR Fire Rated Access Door Non-insulated fire-rated access door for wall installation only, rated 1.5 hour 'B' label and usable in 2-hour fire-rated wall assemblies.
• KRP-350FR Fire Rated Access Door Fire-rated access door for drywall surfaces with textured frame and bead for concealing flange; insulated, rated 1.5 hour 'B' label in walls and 3 hours in ceilings.
• KRP-450FR Fire Rated Access Door Non-insulated fire-rated access door for drywall walls only, rated 1.5 hour 'B' label.
• DSC-214M Flush Access Door General purpose flush access door for all surfaces with exposed flange adding rigidity and concealing rough wall openings.
• SM Surface Mounted Access Door Surface mounted door with single-piece construction that does not require framing or cutting of inner wall obstructions; opens to 175 degrees.
• KDW Flush Access Door Flush access door for drywall surfaces with textured frame and bead allowing drywall joint compound to conceal the flange.
• PF Press-Fit Drywall Access Panel Lightweight door that installs by bending tabs on return to grip drywall without tools, one-piece construction with beveled frame.
• STC Acoustical Access Door Galvanized steel access door with 5/8" acoustical tile providing noise reduction coefficient (NRC) of .055 and closed cell neoprene gasketing for sound-rated applications.
• FG Glass Fiber Reinforced Gypsum Access Door GFRG access door designed to blend seamlessly into drywall ceiling; concealed for picture-perfect appearance while maintaining required accessibility.
• FGH Glass Fiber Reinforced Gypsum Hinged Access Door Hinged GFRG access door that blends seamlessly into walls and ceilings, lightweight and suitable for new or retrofit construction.
• CDW All Drywall Ceiling Access Panel Flush access panel for ceiling installation with concealed appearance, featuring Type X fire and impact resistant gypsum board construction.
• KAD Aluminum Drywall Access Door Concealed access door with hidden hardware behind a mold- and mildew-resistant gypsum inlay; completely removable door providing unobstructed access in walls and ceilings; designed for upscale interiors.
• DSC-210 Recessed Access Door for Tile Recessed access door designed to accommodate all makes and types of tile thicknesses up to 1" with concealed pivoting bar hinge.
• KATR Recessed Fire Resistant Ceiling Door Access door for suspended drywall ceiling as part of a fire-rated floor-ceiling assembly; maintains fire-resistive qualities with steel and double-thickness drywall.
• RDW Recessed Access Door for Drywall Surfaces Recessed access door with face designed to receive a drywall panel to match the texture of the surrounding drywall.
• RDWPD Recessed Door with Factory Installed Drywall Access door with factory-installed 5/8" drywall on face to match surrounding texture, reducing installation time and costs.
• DSC-214PL Flush Access Door for Plastered Surfaces Flush access door with expansion casing bead and galvanized lath for plaster applications.
• DSC-210PL Recessed Access Door for Plastered Surfaces Recessed access door lined with self-furring metal lath allowing plaster to continue over the face of the door.
• KSTDW Sesame Drywall Ceiling Hatch Ceiling hatch designed for complete concealment in drywall ceilings with a sesame door mechanism.
• KSTC Sesame Concealed Grid Ceiling Hatch Ceiling hatch for concealed grid ceiling systems with panel that opens to receive tile and releases for 90 degree opening.
• KSTE Sesame Exposed Grid Ceiling Hatch Ceiling hatch designed for exposed grid systems with panel that opens to receive tile and releases for 90 degree opening.
• KAL Anti-Ligature Access Door Security access door engineered for anti-ligature installations in correctional facilities, psychiatric hospitals, and detention centers.
• DSB-123SD High Security Access Door High security access door for maximum security areas where access is required for repair or maintenance.
• DSB-123SD-MS Medium Security Access Door Medium security access door suitable for housing projects, hospitals, or situations requiring more secure access.
• KAWT Air & Water Tight Access Door Heavy-duty 16 gauge steel flush access panel for walls and ceilings preventing air infiltration and water penetration, with 5-stage iron phosphate coating and baked enamel finish.
• MX Exterior Access Door Redesigned exterior access door with improved acoustical and thermal performance, reduced air leaks and water penetration, with 2X insulation and factory-applied caulking.
• MXPL Insulated Exterior Access Door Insulated exterior access door engineered for years of exposure to severe outdoor elements; galvanized steel, electrostatic rust-inhibitive powder finish, closed-cell neoprene gasket, and Lift & Turn Compression Latch for watertight seal.
• HA Plastic Access Door Handi-Access plastic door suitable for all surfaces; installed using glue or caulking adhesive.
• KHD Hinge and CAM Latch Duct Door Duct door furnished with hinges and cam latch; frames easily attached to duct with notched knockover tabs.
• KCD Removable Duct Door with Double Cam Latch Removable duct door furnished with double cam latches; frames easily attached to duct with notched knockover tabs.
• KRVB Recessed Valve Box Recessed valve box for plumbing valve access applications.
• KSMB Surface Mounted Valve Box Surface mounted valve box that can have louvers, peepholes, or glass panels; can be drilled or punched for pipes or conduits of all sizes.
• KAFA Floor Door Floor door available in recessed 1/8" for resilient tile, smooth, abrasive-coated, and embossed diamond pattern panels, with frames sealed with rubber cork strip.
• KFD-SD Standard Duty Floor Door Standard duty floor door (300 lb/sq. ft. load rating) for sturdy access in concrete applications; can be made watertight, spring-assisted, and equipped with stainless steel snap lock.
• KFD-HD Heavy Duty Floor Door Heavy duty floor door with H20 loading rating for sturdy access in any concrete application; can be made watertight, spring-assisted, and equipped with stainless steel snap lock.
• KRHG Galvanized Roof Hatch Roof hatch with heavy-gauge stiffeners for added support and stability, push-button lock release, durable gasketing for watertight closure, finished with EPA-approved electrostatic paint.
• KRHA Aluminum Roof Hatch Aluminum roof hatch for installations requiring strong, lightweight, and rust-resistant access; re-engineered design with increased-gauge aluminum, push-button lock release, and watertight closure.

Quantifiable outcome

• 400-500% faster production through robotic manufacturing
• +2 more outcomes

Named customers2 records

Segments2 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature3 records

Scale indicators7 records

Recent moves5 records

Expansion highlights4 records

Direct peers

• Acudor Products: Acudor Products manufactures access doors, roof hatches, floor doors, and valve boxes across commercial and residential construction, directly competing with Karp across the same core product categories.
• Babcock-Davis: Babcock-Davis offers access doors, floor doors, roof hatches, and smoke vents for commercial buildings, mirroring Karp's product range and serving the same architectural-specification channel.
• Nystrom: Nystrom manufactures access doors, roof hatches, floor doors, and ventilation products for commercial construction, positioning as a direct competitor in the building specialties channel.
• JL Industries: JL Industries produces fire-rated and architectural access doors, fire protection cabinets, and roof hatches, overlapping with Karp's fire-rated and concealed access door lines.
• Cendrex: Cendrex manufactures access panels and doors for walls and ceilings in residential and commercial applications, a close SKU-by-SKU peer to Karp's flush and drywall access door lines.
• Elmdor: Elmdor (by Activar Construction Products Group) makes access doors and panels for the construction trade, competing head-to-head with Karp in drywall and surface-mounted SKUs.
• Milcor: Milcor specializes in commercial access doors and metal building products, historically a legacy peer to Karp in the architectural specification channel.
• Williams Brothers Corporation of America: Williams Brothers manufactures access doors and panels for walls and ceilings, a smaller but direct competitor in the architectural access door segment.

Broad incumbents

• MIFAB: MIFAB is a broader commercial plumbing and building products manufacturer whose valve boxes, access covers, and drainage products overlap partially with Karp's valve box and floor door categories.
• Activar Construction Products Group: Activar CPG owns multiple access door brands (including Elmdor and others) and competes with Karp as a multi-brand building specialties platform, though with a wider product portfolio.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat5 records

Key risks6 records

Key highlights6 records

Customer concentration

• Facebookfacebook.com/Karp-Associates-254181285323722
• LinkedInlinkedin.com/company/karp-inc

Compliance2 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

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 Karp Associates