Gilkey Window Co.

What Gilkey Window Co. does

Gilkey Window Co. is a privately held, family-owned manufacturer and installer of custom vinyl and fiberglass windows and doors, founded in 1978 by Mike Gilkey and currently co-led with Vince Gilkey. The company operates from a single Cincinnati, Ohio manufacturing facility expanded in March 2022, and sells through a vertically integrated, factory-direct model that bypasses wholesalers, dealers, and third-party contractors. Its four sales/showroom locations cover the Cincinnati, Chicago (Chicago Ridge and Palatine), and Louisville markets, with stated intent to extend into Dayton and Lexington.

The product portfolio comprises Double-Hung, Casement, Sliding, Bay and Bow, and Tilt and Turn windows; Entry Doors and Patio Doors; and three proprietary technology platforms: the System Boreal vinyl honeycomb frame, the Signature Series all-fiberglass double-hung with mortise-and-tenon joinery, and the patented G-Series hybrid. Differentiated technical components include multi-chambered fusion-welded frames, block-and-tackle balance systems, multi-point locking hardware, LoE366 and Ultra Triple Pane (Energy Star Most Efficient) glazing, and IR-reflective laminate finishes. The company's stated performance benchmarks include DP 90/220 mph wind resistance ratings and lifetime frame warranties. All installation is performed by AWDI-certified, EPA Lead-Safe certified in-house technicians, distinguishing the offering from dealer-channel competitors.

The business model is essentially transactional and one-time: each project is a custom-manufactured, professionally installed sale with no subscription or recurring software component, augmented by a GreenSky consumer-financing partnership (up to $100,000 credit lines, 15-month no-interest promotional periods) and a post-installation repair service. The customer base is concentrated in residential replacement-window buyers across the Midwest, with management indicating that more than half of new business originates from referrals and repeat customers. No public revenue, headcount beyond a 51-100 band, or funding history is disclosed.

Name

Gilkey Window Co.

Legal name

Gilkey Window Company

Website

https://gilkey.com

Company type

Private

Founded year

1978

Operating status

Operating

Headcount range

51–100 employees

Short description

Gilkey Window Co. is a family-owned custom vinyl and fiberglass window and door manufacturer and installer founded in 1978, serving residential homeowners in the Midwest (Cincinnati, Chicago, Louisville) via a vertically integrated factory-direct model with in-house AWDI-certified installation.

Ownership category

akta.pro rank

Headquarters

HQ city

Cincinnati

HQ country

United States

HQ region

North America

Offices5 records

Markets served

GTM type

B2C

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Window Sales and Installation: Gilkey manufactures and installs custom windows directly to homeowners. Revenue is generated through one-time product sales combined with professional installation services. The factory-direct model eliminates middleman markups, allowing competitive pricing while maintaining quality control.
2. Door Sales and Installation: Entry doors and patio doors sold with professional installation services. Products include fiberglass and steel entry doors, and sliding vinyl/fiberglass patio doors. Revenue generated through one-time purchase and install.
3. Financing Services: Partnership with GreenSky allows customers to finance purchases through monthly payment plans. GreenSky offers credit limits up to $100,000 with no pre-payment penalty and promotional periods including no-interest options. Gilkey earns revenue from completed sales; financing enables higher transaction values.
4. Repair and Service: Post-installation repair services for existing Gilkey products including glass replacement, balance repairs, and general maintenance. Customers can request service through the website.

Pricing tiers

Go-to-market motion1 record

Distribution channels4 records

Marketing channels8 records

Core offering

Gilkey Window Co. designs, manufactures, and installs custom-built vinyl, fiberglass, and hybrid replacement windows as well as entry and patio doors for residential homeowners through a factory-direct model. All products are produced at its Cincinnati manufacturing facility and installed by AWDI-certified, EPA Lead-Safe trained in-house employees, eliminating dealer, distributor, and contractor middlemen.

Product overview

Gilkey Window Co. is a window and door manufacturer and installer offering custom-built products through a factory-direct model. The company produces two primary window material lines: fiberglass (Signature Series) and vinyl (System Boreal), plus a patented G-Series Hybrid combining both materials. Product portfolio includes Double-Hung, Casement, Sliding, Bay & Bow, and Tilt & Turn windows, as well as Entry and Patio doors. All products are manufactured at the company's Cincinnati facility and installed by company-employed, AWDI-certified installers. The company differentiates through patented technologies like honeycomb frame construction, energy-efficient glazing options (LoE coatings), and laminate color treatments.

Differentiator

Problem solved

Functional benefit

Brands

• Signature Series Fiberglass: Premium fiberglass windows featuring traditional mortise and tenon joinery and old-world craftsmanship.
• System Boreal Vinyl
• G-Series Hybrid

Products and services

• Signature Series Fiberglass Windows Exclusive all-fiberglass double hung window featuring traditional mortise and tenon joinery and old-world craftsmanship, with authentic styling combined with modern performance technology. Targeted at residential homeowners seeking premium fiberglass replacement windows.
• System Boreal Vinyl Windows Vinyl window line made with 100% lead-free virgin uPVC and twice the titanium dioxide of the industry minimum for UV protection, with a multi-chamber honeycomb frame for sound abatement, impact resistance, and thermal performance. Targeted at residential homeowners replacing windows.
• G-Series Hybrid Windows Patented hybrid double hung window combining a low-profile fiberglass frame with vinyl fusion-welded, reinforced sashes to maximize daylight in insert installations while retaining interior trimwork. Targeted at homeowners doing insert replacements who want larger glass area.
• Double-Hung Windows Classic two-sash vertical-sliding window style offered in fiberglass (Signature Series), vinyl (System Boreal), and hybrid (G-Series) material options for residential replacement.
• Casement Windows Hinged windows that crank open outward. Signature Series Casement and Awning windows offer DP 90 ratings, superior insulation, 220 mph wind resistance, and a lifetime warranty. Targeted at homeowners prioritizing energy efficiency and security.
• Sliding Windows Sideways-operating windows featuring a durable honeycomb frame for strength, with versatile 2- or 3-panel options for residential use.
• Bay & Bow Windows Projection windows that add interior space, sweeping views, hidden storage, and decorative options to homes, available in 3-Section Bay and 4- or 5-Lite Bow configurations.
• Tilt & Turn Windows European-engineered dual-action windows that tilt in from the top for secure ventilation or swing in like a casement for full access and interior cleaning. Combines European engineering with American-made craftsmanship.
• Entry Doors Custom-crafted fiberglass or steel entrance doors designed for curb appeal, security, and energy efficiency, made-to-order and uniquely customized for residential homeowners.
• Patio Doors Vinyl and fiberglass patio doors positioned as the quietest and most thermally efficient on the market, featuring patented innovations and an ultimate weather barrier design for residential use.
• Factory Direct Manufacturing & Installation Service End-to-end in-house manufacturing of custom vinyl and fiberglass windows at the Cincinnati facility since 1978, combined with professional installation by AWDI-certified, EPA Lead-Safe trained company employees — eliminating dealer, distributor, and contractor middlemen and their markups.
• Repair and Service Post-installation repair and maintenance service for existing Gilkey windows and doors, including glass replacement, balance repairs, and general service, requested through the company's website.

Quantifiable outcome

• 162,000+ successful installations with 47+ years of experience
• +5 more outcomes

Named customers2 records

Segments2 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature8 records

Scale indicators10 records

Recent moves7 records

Expansion highlights6 records

Broad incumbents

• Andersen Corporation: The largest US window and door manufacturer (Renewal by Andersen is its replacement-focused subsidiary). Competes with Gilkey across all material segments (wood, vinyl, fiberglass, composite) and has a much broader product portfolio plus national dealer/renovation network. Comparable as a competing premium replacement brand but vastly larger scale.
• Pella Corporation: Major US window and door manufacturer with strong Midwest dealer presence. Offers vinyl (Pella 250/Encompass), fiberglass, and wood lines that overlap directly with Gilkey's Signature Series, System Boreal, and G-Series products. Same premium-positioned direct-to-consumer and dealer-distributed replacement go-to-market.
• Marvin Windows and Doors: Premium window and door manufacturer known for fiberglass (Infinity) and wood lines. Competes with Gilkey in the high-end replacement segment where energy efficiency, craftsmanship, and customization are key purchase criteria—comparable premium positioning but larger national footprint.
• Window World: Largest US replacement window franchise with stores nationwide including in Gilkey's Midwest territories. Competes primarily on price-driven vinyl replacement, while Gilkey's premium positioning sets it apart, both serve the same retrofit customer through in-home sales motions.
• Simonton Windows: Vinyl-focused window and patio door manufacturer (now part of Cornerstone Building Brands) supplying both new construction and replacement channels. Overlaps with Gilkey's System Boreal vinyl line on product type though distributed primarily through dealers rather than factory-direct.
• JELD-WEN: Large global window and door manufacturer with IWP, JELD-WEN, and VistaPointe brands covering wood, vinyl, and fiberglass. Competes in Midwest replacement channels and overlaps with Gilkey's entry-door (fiberglass/steel) and patio-door product lines.

Direct peers

• Champion Window: Direct-to-consumer replacement window and door manufacturer with company-owned manufacturing and in-house installation teams—structurally identical factory-direct model to Gilkey. Operates in Midwest markets (Cincinnati, Chicago) and competes head-to-head on similar vinyl product lines sold through in-home consultations.
• Renewal by Andersen: Andersen's full-service replacement subsidiary using a start-to-finish consultative selling model—closely mirrors Gilkey's in-home consultation + factory-direct installation flow. Operates in Cincinnati, Chicago, and other Gilkey markets, making it a directly comparable go-to-market competitor.
• ProVia Window: Mid-sized manufacturer of custom vinyl and fiberglass windows and doors sold through professional dealers and direct channels. Comparable in scale to Gilkey, with a similar premium custom-build positioning and overlapping Midwest dealer/distribution footprint that creates direct channel conflict.

Regional players

• Milgard Windows & Doors: Vinyl and fiberglass window manufacturer with manufacturing-direct and builder-distributed channels. Most active in Western US, comparable in product mix (vinyl Tuscany/Ultra series overlap with System Boreal) but limited overlap in Gilkey's Midwest core territory.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

• Facebookfacebook.com/GilkeyWindows/reviews
• LinkedInlinkedin.com/company/gilkey-window-co.-inc.

Compliance3 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles2 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 Gilkey Window Co.