MITER Brands

What MITER Brands does

MITER Brands is a privately held U.S. residential window and door manufacturer founded in 1947 and headquartered in Harrisburg, Pennsylvania, operating under a holding company structure (MITER Brands Holdco, LLC; MITER Brands Acquisition Holdco, Inc.). The company operates as a multi-brand parent of MI Windows and Doors, PGT Windows and Doors, MILGARD Windows and Doors, Western Architectural Openings (formerly Western Window Systems), WinDoor, CGI Windows and Doors, Sunrise Windows, and Anlin Windows-Doors. Following the March 2024 acquisition of PGT Innovations for $3.1 billion, MITER employs 8,000+ people across 15+ manufacturing facilities in seven states and serves 5,000+ customers annually through an authorized dealer network covering all 50 states.

The company's core technology spans vinyl, fiberglass, and aluminum fenestration, with proprietary platforms including Diamond Glass (lightweight impact-resistant laminated glass), Triple Insulating Glass Units co-developed with Corning Incorporated (reducing impact window weight by up to 40%), and large-format systems such as the Series 8630 Fixed/Window Wall (panels up to 50 sq ft) and the Preferred View Sliding Glass Door with 2.5-inch interlocks. Products are made-to-order in America, certified to ENERGY STAR version 7.0, California Title 24, HVHZ Florida Product Approval, and AW90/CW50 AAMA performance ratings. Seven manufacturing facilities hold OSHA VPP Star certification, an achievement held by fewer than 0.5% of U.S. workplaces.

MITER generates revenue primarily through B2B sales of manufactured windows and doors to authorized dealers and direct accounts serving new construction, replacement, and renovation segments. Business credit terms (1%10N30 or Net 30) and dealer credit applications govern the transaction-based pricing model, which is not publicly disclosed. The go-to-market combines dealer networks across all 50 states, dedicated new construction field sales, and active participation in trade shows (IBS, SEBC, Modernism Week). The company has pursued an aggressive portfolio strategy: acquiring PGT Innovations ($3.1B, March 2024) while divesting Eze-Breeze, NewSouth Window Solutions, ECO Window Systems, Martin Door, and CRi SoCal between 2024 and 2025 to concentrate on core glass window and door manufacturing.

Name

MITER Brands

Legal name

MITER Brands

Website

https://miterbrands.com

Company type

Private

Founded year

1947

Operating status

Operating

Headcount range

1,001–5,000 employees

Short description

MITER Brands is a privately held U.S. residential window and door manufacturer operating a multi-brand portfolio (MI, PGT, MILGARD, Western Architectural Openings, WinDoor, CGI, Sunrise, Anlin) across 15+ facilities and 8,000+ employees, selling through a 50-state dealer network serving new construction, replacement, and luxury architectural segments.

Ownership category

akta.pro rank

Product category

Windows and Doors Manufacturing

NAICS

Wood Window and Door Manufacturing (321911), Metal Window and Door Manufacturing (332321)

SIC

Metal Doors, Sash, Frames, Moldings & Trim (3442), Wholesale-Lumber, Plywood, Millwork & Wood Panels (5031)

akta.pro primary industry

Windows, Doors & Millwork Distribution (CRAOAFAI)

Keywords

• Residential windows manufacturing
• Impact-resistant doors
• Fenestration products
• Moving glass walls
• Energy-efficient glazing

Headquarters

HQ city

Fife

HQ country

United States

HQ region

North America

Offices9 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Windows and Doors Manufacturing: MITER Brands generates revenue through manufacturing and selling residential windows and doors across multiple brands (MI Windows and Doors, PGT Windows and Doors, MILGARD Windows and Doors, Western Window Systems/Western Architectural Openings, WinDoor, Sunrise Windows). Products are sold through dealer networks for both new construction and replacement/renovation applications. Made-to-order manufacturing with products produced in America.

Pricing tiers

Go-to-market motion2 records

Distribution channels3 records

Marketing channels5 records

Core offering

MITER Brands manufactures and sells residential and commercial windows and doors through a portfolio of sub-brands (MI Windows and Doors, PGT Windows and Doors, MILGARD, Western Architectural Openings, WinDoor, CGI, Sunrise, Anlin). Products are made-to-order in American manufacturing facilities and span vinyl, fiberglass, and aluminum fenestration with focus on impact resistance, energy efficiency, and indoor-outdoor living. Distribution is through authorized dealer networks covering all 50 U.S. states, serving new construction and replacement/renovation segments.

Product overview

MITER Brands is a family of leading window and door brands offering a comprehensive portfolio of residential and commercial fenestration products. The company operates as a parent organization with multiple sub-brands including MI Windows and Doors (vinyl windows and moving glass walls), MILGARD Windows and Doors (vinyl, fiberglass, and aluminum products for Pacific Northwest), PGT Windows and Doors (high-performance impact-resistant products for Florida), Western Architectural Openings (luxury large-format glass walls), and WinDoor (luxury coastal products). Key product lines span fiberglass windows (C700 Series), vinyl windows (V400 Tuscany Series, Carbonite Collection), moving glass walls (AX650, VX4500, Series 8000 Vantage Line), hinged and pivot doors (Series 8900, WinDoor Pivot Door), and innovative glass technologies (Diamond Glass, Triple IGU). Products serve new construction, replacement, and luxury architectural segments across all 50 U.S. states.

Differentiator

Problem solved

Functional benefit

Brands

• MI Windows and Doors: Windows and doors for new construction and replacement applications
• PGT Windows and Doors
• Milgard Windows and Doors
• Western Architectural Openings
• WinDoor
• CGI Windows and Doors
• Sunrise Collection
• Anlin Windows-Doors
• MITER Foundation

Products and services

• MI Windows and Doors Sub-brand offering stylish, high-performance vinyl windows and moving glass walls for new construction and replacement applications, sold through a dealer network.
• PGT Windows and Doors Sub-brand offering high-performance impact-resistant windows and doors, including WinGuard Aluminum and Vinyl lines, engineered for hurricane protection in Florida and coastal markets.
• MILGARD Windows and Doors Sub-brand founded in the Pacific Northwest in 1958 producing vinyl, fiberglass, and aluminum windows and doors including the Tuscany Series and AX650 Moving Glass Wall System.
• Western Architectural Openings Luxury window and door sub-brand (formerly Western Window Systems) leading manufacturer of large-format glass walls, doors, and window systems for luxury residential and commercial architecture.
• WinDoor Sub-brand offering luxury specialty windows and doors for coastal living, including Pivot Doors and Pass-Through Awning Windows with HVHZ Florida Product Approval.
• CGI Windows and Doors Sub-brand offering residential and commercial window and door products as part of the MITER Brands portfolio.
• Sunrise Windows Premium window brand (Sunrise Collection) under Sunrise Windows LLC, part of MITER Brands affiliated entities.
• Anlin Windows-Doors Sub-brand offering premium vinyl windows and doors as part of the MITER Brands portfolio.
• Carbonite Collection Premium black/black vinyl window and door collection featuring capstock color technology, including V3000TX casement and awning platforms with thinner frame profiles and the VX4500 Moving Glass Wall system.
• C700 Series Fiberglass Windows and Patio Doors Fiberglass windows and patio doors featuring clean sightlines, modern frame profiles, and SmartTouch hardware. Meets ENERGY STAR version 7.0 requirements across climate zones, targeted at high-end residential new construction and remodeling.
• V400 Tuscany Series Vinyl Windows Vinyl windows in casement, horizontal slider, and picture window configurations with energy-efficient glass and enhanced insulation designed for cold climates.
• AX650 Moving Glass Wall System Sliding patio doors providing a sleek, contemporary aesthetic connecting indoor spaces to outdoor areas, with structural strength and weather resistance for large spans of glass.
• Series 8630 Fixed/Window Wall Fixed/window wall engineered for large-format openings with narrow sightlines supporting panel sizes up to 50 square feet, featuring a 4.5-inch thermally broken aluminum frame and AW90 AAMA performance rating.
• Series 8000 Vantage Line Premium aluminum window and door line featuring ultra-thin sightlines, advanced thermal break technology, and exceptional performance; includes Series 8630, 8660, 8665, and 8670 products.
• Series 300 Minimalist Multi-Slide Door Minimalist multi-slide doors with slim interlock sightlines and large openings maximizing daylight, featuring flush sills for smooth, durable operation and seamless indoor-outdoor transitions.
• Series 8900 Hinged Door Hinged door available in single or double-panel configurations supporting panel sizes up to 48 inches wide by 120 inches tall, featuring thermal break technology, dual-glazed LoĒ³-366 glass, and a multi-point locking system.
• WinDoor Pivot Door (PV9998A) Luxury pivot entry door for coastal living, expanded in 2025 to sizes up to 6 feet wide by 12 feet tall, anchoring homes with strength and elegance for expansive glass and minimal sightlines.
• WinDoor Pass-Through Awning Window Pass-through awning window (AW9942A/AW9842A) with continuous top hinge, concealed gas springs, and single-point locking. HVHZ Florida Product Approval, supports units up to 32 square feet for enhanced indoor-outdoor living.
• WinGuard Aluminum Preferred View Sliding Glass Door (SGD770NS) Impact-resistant sliding glass door with narrow 2.5-inch interlocks (half standard width), with panel sizes up to 60 square feet and configurations up to 8 panels wide creating openings up to 48 feet wide.
• WinGuard Aluminum Impact Windows and Doors Impact-resistant aluminum windows and doors engineered for the Florida climate, including Single Hung 7700A, Picture Window 7720A, Preferred Sliding Glass Door 770, and Preferred View Sliding Glass Door 770NS with hurricane protection.
• VX4500 Moving Glass Wall System Moving glass wall system with highly configurable layouts including multi-track, pocket, and corner configurations; capstock solution for modern home designs with expansive, unobstructed openings.
• V3000 Series Casement and Awning Windows V3000TX casement and awning platforms with thinner frame profile providing more glass area than comparable products, delivering a modern design aesthetic for expansive openings.
• Estate by PGT Entry Doors (FD450) Entry doors with Low-E glass as part of PGT's product portfolio for residential applications, including impact-resistant and energy-efficient options.
• WinGuard Aluminum French Doors (FD160) French doors with insulating, argon gas-filled, Low-E glass; impact-resistant aluminum construction for coastal and hurricane-prone areas.
• WinGuard Vinyl Single Hung Windows (SH5500) Impact-resistant vinyl single hung windows with insulating Low-E glass for energy efficiency and hurricane protection.

Quantifiable outcome

• 7 VPP Star-certified facilities with injury rates typically half the industry average
• +2 more outcomes

Named customers6 records

Segments4 records

Ideal customer profiles4 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration2 records

Feature5 records

Scale indicators7 records

Recent moves14 records

Expansion highlights6 records

Broad incumbents

• Therma-Tru Doors: Leading manufacturer of fiberglass and steel entry doors, part of Fortune Brands Innovations. Competes with MITER Brands' entry door portfolio (including Estate by PGT and WinDoor pivot doors) across residential new construction and replacement channels.
• Cornerstone Building Brands: Large US building products conglomerate owning Simonton Windows, Atrium Windows and Doors, and other fenestration brands. Was the prior owner of PGT Innovations before MITER's $3.1B acquisition, and remains a broad incumbent with overlapping window and door product lines.

Direct peers

• Jeld-Wen: One of the world's largest manufacturers of windows, doors, and related building products. Directly competes with MITER Brands across vinyl, wood, fiberglass, and aluminum windows and doors for residential new construction and replacement, with overlapping dealer and home-center distribution.
• Andersen Corporation: Privately held US leader in residential windows and doors, including Andersen and Renewal by Andersen brands. Directly comparable on product breadth, dealer distribution, and replacement-market focus, with similar exposure to energy-efficiency and impact-resistant product trends.
• Pella Corporation: Privately held manufacturer of residential windows and doors (Pella, Pella Impervia, ThermaStar). Direct competitor across price tiers with a comparable dealer and big-box retail go-to-market and similar investment in fiberglass and impact-resistant innovation.
• Masonite International: Leading global manufacturer of interior and entry doors, with growing fenestration exposure. Directly competes with MITER in door categories and shares residential new construction and replacement end markets.
• Marvin Windows and Doors: Family-owned premium manufacturer of wood, fiberglass (Infinity), and aluminum windows and doors. Direct competitor to MITER's MILGARD and Western Architectural Openings brands in the premium/luxury residential and architect-specified segments.
• Sierra Pacific Windows: Window and door division of Sierra Pacific Industries, producing wood, vinyl, and aluminum windows. Competes head-to-head with MITER's MILGARD and MI brands, particularly in the Western US and custom home builder channels.
• Weather Shield Windows & Doors: Now part of Jeld-Wen, Weather Shield manufactures premium wood, vinyl, and fiberglass windows and doors. Direct competitor in residential new construction and replacement, with overlapping architectural and builder channels versus Western Architectural Openings and MILGARD.

Regional players

• Harvey Building Products: Northeast US-focused manufacturer and distributor of windows, doors, roofing, and insulation. Directly comparable product offerings in vinyl and wood windows, primarily serving New England and Mid-Atlantic dealers — overlapping with MITER's MI Windows dealer territory.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat6 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/miter-brands
• Instagraminstagram.com/miterbrands
• Facebookfacebook.com/MITERBrands
• YouTubeyoutube.com/c/MITERBrands
• Xx.com/MITERbrands

Compliance6 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles18 records

Subsidiaries30 records

Funding overview

Funding rounds1 record

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A1 record

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about MITER Brands