What WinDor Systems does

WinDor Systems (legal entity Win-Dor, LLC) is a U.S. manufacturer of custom vinyl and aluminum windows and doors, founded in 1990 and headquartered in Brea, California. The company operates a single manufacturing facility in Brea and has been in business for over 35 years, originally serving the Southern California residential market. Its product portfolio is organized into two material categories: aluminum-reinforced vinyl products (1550, 1750, 2750, and 3750 series) and aluminum products (4750 series), spanning sliding windows, single hung windows, picture windows, casement windows, awning windows, folding windows, multi-slide doors, folding doors, sliding patio doors, swing doors, pivot doors, and commercial doors. The company's core technology combines aluminum reinforcement with vinyl or all-aluminum frames, with the 3750 series claiming the largest vinyl multi-slide panels on the market at up to 46 11/16 inches wide.

WinDor sells exclusively through a network of 240+ authorized dealers across 30+ U.S. states, including independent window and door retailers, building materials suppliers, home improvement stores, and contractors — the company does not sell directly to consumers. Dealers are supported with a dedicated portal offering quote and ordering tools, technical documentation, photo galleries, video libraries, and training materials. End customers are primarily homeowners undertaking residential construction or renovation projects, with secondary customer segments including builders, contractors, architects, and developers specifying WinDor products for specific projects such as luxury indoor-outdoor living developments.

The company's revenue model is fundamentally a hardware sales model: dealers purchase products from WinDor at manufacturer-level pricing and resell/install to end consumers. Public pricing is not disclosed; consumers are directed to dealers via the website's "Find a Dealer" locator and a Get Quote form. The company is privately held with no evidence of external investment, PE ownership, or institutional shareholders, and appears to be founder/family-owned based on team references.

Name

WinDor Systems

Legal name

Win-Dor, LLC

Website

https://windorsystems.com

Company type

Private

Founded year

1990

Operating status

Operating

Headcount range

251–500 employees

Short description

WinDor Systems is a U.S. manufacturer of custom aluminum-reinforced vinyl and aluminum windows and doors, founded in 1990 and headquartered in Brea, California. It sells exclusively through a network of 240+ authorized dealers across 30+ U.S. states serving residential homeowners, builders, contractors, and architects.

Ownership category

akta.pro rank

Headquarters

HQ city

Brea

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Window and Door Product Sales: WinDor Systems generates revenue through the manufacture and sale of custom vinyl and aluminum windows and doors. Products are sold through an authorized dealer network; dealers purchase products from WinDor and then sell/installation to end consumers (homeowners, builders, contractors). Revenue is generated from product sales at the manufacturer level to dealers.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels6 records

Core offering

WinDor Systems manufactures custom aluminum-reinforced vinyl and aluminum windows and doors for residential construction and renovation. The product portfolio spans 1550, 1750, 2750, and 3750 series vinyl products plus the 4750 aluminum series, covering multi-slide, folding, sliding patio, swing, pivot, and commercial doors along with sliding, single hung, picture, casement, awning, and folding windows. Products are sold exclusively through a network of over 240 authorized dealers across 30+ U.S. states, with custom sizing per project specifications.

Product overview

WinDor Systems is an American manufacturer and supplier of high-quality vinyl windows and doors, operating for over a quarter century serving Southern California. The product portfolio consists of two primary material categories: Aluminum-reinforced Vinyl products (Series 1550, 1750, 2750, and 3750) and Aluminum products (Series 4750). The vinyl lines include sliding windows, single hung windows, picture windows, casement windows, awning windows, and folding windows, plus multi-slide doors, folding doors, swing doors, and sliding patio doors. The aluminum series offers multi-slide doors, sliding patio doors, pivot doors, commercial doors, folding doors, swing doors, and direct set windows. Series designations indicate profile dimensions: 1550/1750 have 1-1/2 inch stile and rail width, 2750 series has 2-3/4 inch width, 3750 series has 3-3/4 inch width, and 4750 series is aluminum construction. Products are distributed through a network of authorized dealers across the United States.

Differentiator

Problem solved

Functional benefit

Products and services

• 1550 Series Sliding Window Sliding window with aluminum-reinforced vinyl frame for residential applications. Part of the 1500 series with 1-1/2 inch stile and rail profile.
• 1550 Series Single Hung Window Single hung window with aluminum-reinforced vinyl construction for residential applications.
• 1550 Series Picture Window Fixed picture window designed to maximize views with aluminum-reinforced vinyl frame.
• 1750 Series Casement Window Casement window with hinged sash that opens outward, aluminum-reinforced for durability.
• 1750 Series Awning Window Awning window with top-hinged sash that opens outward for ventilation.
• 1750 Series Picture Window Picture window in the 1750 series with aluminum-reinforced vinyl construction.
• 2750 Series Folding Window Folding window system that opens wide to connect indoor and outdoor spaces, part of the 2750 series with 2-3/4 inch stile and rail profile.
• 2750 Series Multi-Slide Door Multi-slide door with aluminum-reinforced vinyl construction; panels slide open for expansive openings. Part of the 2750 series with 2-3/4 inch stile and rail profile.
• 2750 Series Sliding Patio Door Sliding patio door with finger-touch open/close operation and energy-efficient design; available with optional LC-PG35 ratings for commercial-grade applications.
• 3750 Series Multi-Slide Door Premium multi-slide door with aluminum-reinforced vinyl construction; largest vinyl panels available for big open spaces, with panels up to 46 11/16 inches wide.
• 3750 Series Folding Door Folding door system that transforms indoor rooms into outdoor living spaces with wide panel configurations. Available with WinShield Jet Black finish.
• 3750 Series Swing Door Swing door with European styling, aluminum-reinforced vinyl construction for elegant entryways. Available with WinShield Jet Black finish.
• 3750 Series Sliding Patio Door Sliding patio door with finger-touch operation, energy efficiency, and affordable pricing; aluminum-reinforced vinyl construction.
• 4750 Series Multi-Slide Door Premium aluminum multi-slide door for large openings, part of the 4750 aluminum series.
• 4750 Series Sliding Patio Door Aluminum sliding patio door for residential and commercial applications.
• 4750 Series Pivot Door Sophisticated pivot door system with rotating panel design for dramatic entryways; aluminum construction.
• 4750 Series Direct Set Window Fixed direct set window for aluminum window applications.
• 4750 Series Commercial Door Commercial-grade aluminum door designed for commercial building applications.
• 4750 Series Folding Door Aluminum folding door for commercial applications requiring large openings.
• 4750 Series Swing Door Commercial aluminum swing door with European styling.

Quantifiable outcome

• 3750 series panels can be manufactured up to 46 11/16 inches wide - the largest vinyl panels on the market
• +2 more outcomes

Named customers4 records

Segments4 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature7 records

Scale indicators4 records

Recent moves6 records

Expansion highlights5 records

Broad incumbents

• JELD-WEN: JELD-WEN is a broad incumbent with a broad portfolio of windows and doors including vinyl, wood, and aluminum lines distributed nationally through dealers and home improvement retailers.
• Andersen Windows & Doors: Andersen is a broad incumbent — a large national manufacturer of windows and doors across vinyl, wood, fiberglass, and composite lines, competing with WinDor's premium residential offerings through dealer and home center channels.
• Marvin Windows and Doors: Marvin is a broad incumbent in premium windows and doors including wood, fiberglass, and aluminum lines, competing with WinDor's large-format and premium residential positioning through a national dealer network.
• Pella Corporation: Pella is a broad incumbent offering vinyl, wood, and fiberglass windows and doors through dealer and retail channels nationwide, with significantly greater scale and marketing reach than WinDor.

Direct peers

• Western Window Systems: Western Window Systems is a direct peer — both companies specialize in large-format multi-slide and folding door systems for luxury indoor-outdoor residential living, with comparable panel size claims and Western U.S. distribution focus.
• Milgard Windows & Doors: Milgard is a direct competitor manufacturing vinyl and aluminum windows and doors for the Western U.S. residential market, with overlapping dealer distribution and similar vinyl-frame product positioning.
• Ply Gem: Ply Gem is a direct peer producing vinyl windows and doors for residential construction and remodeling, with national distribution through dealers and builder relationships.
• Simonton Windows: Simonton is a direct peer in vinyl windows and doors for the residential replacement and new construction market, with overlapping dealer channel and similar vinyl product portfolio.
• Anlin Windows & Doors: Anlin is a direct peer — a California-based vinyl window and door manufacturer selling through a regional dealer network across the Western U.S. with comparable product lines and price points.
• MI Windows and Doors: MI Windows is a direct competitor in vinyl and aluminum windows for residential applications, with a multi-region dealer network and similar price-segment positioning.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks5 records

Key highlights7 records

Customer concentration

• Xx.com/windorsystems
• Facebookfacebook.com/WinDorSystems
• LinkedInlinkedin.com/company/windorsystems

Revenue estimate

Valuation estimate

Number of profiles

Profiles5 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 WinDor Systems