STL Windows and Doors by Lombardozzi Construction

What STL Windows and Doors by Lombardozzi Construction does

STL Windows and Doors by Lombardozzi Construction is a family-owned residential window and door replacement contractor operating in the Greater St. Louis Metro Area from a showroom and headquarters in Earth City, Missouri. Founded in 2013/2014 and operating as a division of Lombardozzi Construction with a team of approximately six employees, the company sells and installs ProVia-brand windows and doors across multiple configurations, including double-hung, single-hung, slider, casement/awning, hopper, picture, garden, bay/bow, and architectural/shaped windows, as well as exterior steel, fiberglass, sliding glass patio, French, and storm doors.

The company is a ProVia Platinum Dealer, the manufacturer's highest dealer tier, and its installers are ProVia factory-certified. Its core technology stack is therefore not proprietary but is sourced from ProVia: ENERGY STAR certified vinyl window and door products featuring Low-E coatings, argon gas fills, multi-chambered frame construction with fusion-welded corners, multi-point locking systems on casement/awning units, and four product tiers (Endure, Aeris, Aspect, EcoLite) spanning premium to entry-level price points. Customization extends to 17+ exterior vinyl colors, wood-interior stains, and decorative glass options.

The business model is sales-led and transactional. Revenue is generated primarily through one-time sales of windows and doors combined with professional in-house installation, with pricing per unit ranging roughly $170-$4,000 installed depending on product type, tier, and configuration. GTM relies on free in-home consultations, a physical showroom, phone scheduling, online estimate requests, and a multi-channel marketing mix including Google/local SEO, paid local radio, direct mail, yard signs, social media, YouTube, and a customer referral program with monetary incentives. Customers are exclusively residential homeowners in St. Louis, St. Charles, Jefferson, Franklin, and Lincoln counties; the company carries a 4.9-star Google rating across 187 reviews and offers a 10-year workmanship warranty on installation in addition to ProVia's limited lifetime transferable product warranty.

Name

STL Windows and Doors by Lombardozzi Construction

Legal name

STL Windows and Doors. A division of Lombardozzi Construction.

Website

https://stlwindowsanddoors.com

Company type

Private

Operating status

Operating

Headcount range

1–10 employees

Short description

STL Windows and Doors is a family-owned ProVia Platinum Dealer that sells and installs residential replacement windows and doors for homeowners across the Greater St. Louis Metro Area from its Earth City, Missouri showroom.

Ownership category

akta.pro rank

Product category

Window and Door Replacement Services

akta.pro primary industry

Window Replacement (Residential) (HSAPAJAA)

akta.pro secondary industry

Exterior Door Replacement (Entry/Patio/French) (HSAPAJAB)

Keywords

• Replacement windows
• Exterior doors
• Window installation
• Door installation
• Residential remodeling

Headquarters

HQ city

Earth City

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2C

Offering type

Services

Cost components

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

Revenue model

1. Window Replacement Sales and Installation: One-time sale and professional installation of replacement windows. Revenue generated per window/unit with pricing varying by product tier (EcoLite through Endure), size, glass configuration, and installation complexity. Process includes in-home consultation, custom ordering, and professional installation by certified technicians.
2. Door Replacement Sales and Installation: One-time sale and professional installation of exterior doors including steel entry doors, fiberglass entry doors, sliding glass patio doors, French doors, and storm doors.
3. Workmanship Warranty: 10-year workmanship warranty on every installation provides quality assurance. Limited lifetime transferable product warranty on ProVia products.

Pricing tiers

Go-to-market motion1 record

Distribution channels4 records

Marketing channels9 records

Core offering

STL Windows and Doors sells and professionally installs residential replacement windows and exterior doors sourced exclusively from ProVia. The company is a ProVia Platinum Dealer offering four ProVia window series (Endure, Aeris, Aspect, EcoLite) and five door categories, with in-home consultations, custom measurement, and certified installation backed by a 10-year workmanship warranty and limited lifetime transferable product warranty.

Product overview

STL Windows and Doors by Lombardozzi Construction is a window and door replacement contractor and ProVia Platinum Dealer offering a comprehensive portfolio of residential window and door products. The company provides installation services for multiple window types including Double Hung, Single Hung, Slider, Casement & Awning, Hopper, Picture, Garden, Bay & Bow, and Architectural & Shaped windows. Their door offerings include Exterior Steel Doors, Fiberglass Entry Doors, Sliding Glass Patio Doors, French Doors, and Storm Doors. All products are sourced from ProVia and span four distinct window series (Endure, Aeris, Aspect, and EcoLite) providing options from premium to budget-friendly tiers. The company offers extensive customization through color, finish, glass, and hardware options. Services include professional installation with a 10-year workmanship warranty, free in-home consultations, and financing options. The company serves the Greater St. Louis Metro Area across Saint Louis, Saint Charles, Jefferson, Franklin, and Lincoln counties.

Differentiator

Problem solved

Functional benefit

Products and services

• Double Hung Windows Double-hung replacement windows with two operable sashes that open and tilt for easy cleaning. Features include sweep lock, tilt latches, and airtight seal for enhanced energy efficiency. Available in Endure, Aeris, Aspect, and EcoLite series.
• Single Hung Windows Single-hung windows with a fixed top sash and operable bottom sash. Features strong energy performance, smooth operation, and dependable weather resistance. Available exclusively in the Endure line.
• Slider Windows Horizontal sliding windows that glide open horizontally along a track. Feature smooth operation, tight seals for energy efficiency, and are ideal for larger window openings in living rooms, bedrooms, and basements.
• Casement & Awning Windows Windows that open from the side (casement) or from the top with a hinge (awning). Feature smooth hinge or crank operation, multi-point locking systems, and full top-to-bottom ventilation. Available in Aspect, Aeris, and Endure series.
• Hopper Windows Small windows that open inward from the top, ideal for basements, bathrooms, and laundry rooms. Feature inward-opening design with upward tilt of glass pane to prevent dirt and debris entry. Available in Endure, Aspect, and EcoLite series.
• Picture Windows Fixed, non-operable windows designed solely to frame outdoor views and allow natural light. Feature clean design with maximum glass surface and excellent insulation. Available in Endure, Aeris, Aspect, and EcoLite series.
• Garden Windows Windows that project outward from the home approximately 17 inches, creating a mini-greenhouse effect with shelf space. Feature side venting windows for ventilation, top slope insulating glass, and are ideal for plants, herbs, or decorative accents. Available in Endure and Aspect series.
• Bay & Bow Windows Bay windows feature three sections (center flanked by two angled panels), while bow windows have four or more equal-sized panels curving outward. Both extend beyond the interior wall to add space and light. Can feature fixed, double-hung, or casement window types.
• Architectural & Shaped Windows Custom-shaped windows including round, half-round, quarter-round, triangular, cathedral, eyebrow, arched, extended eyebrow, octagon, pentagon, and trapezoid shapes. Fixed in place for energy efficiency and architectural accent. Available across all ProVia series.
• Exterior Steel Doors Steel entry doors for exterior applications with professional installation services provided.
• Fiberglass Entry Doors Fiberglass entry doors offering durability and aesthetic options for residential exteriors.
• Sliding Glass Patio Doors Sliding glass patio doors providing access to outdoor spaces with smooth operation and energy-efficient glass.
• French Doors Traditional French doors for exterior applications with classic styling and glass panels.
• Storm Doors Storm doors providing additional protection and ventilation options for exterior entryways.
• Dormer Window Replacement Specialized replacement service for dormer windows designed for roofline applications. Includes removal of existing windows, installation of energy-efficient replacements, proper flashing, sealing, and waterproofing.
• Basement Window Replacement Replacement services for basement windows to improve ventilation, light, and energy efficiency in below-grade spaces.
• Window and Door Installation Services Professional window and door installation services including free in-home consultation, custom measurement, professional installation with proper flashing, sealing and waterproofing, and 10-year workmanship warranty. Services cover Greater St. Louis Metro Area including Saint Louis, Saint Charles, Jefferson, Franklin and Lincoln counties.

Quantifiable outcome

• Windows responsible for up to 30% of home heating and cooling use; new energy-efficient windows can save $125-$340 per year on energy costs
• +1 more outcomes

Named customers5 records

Segments1 record

Ideal customer profiles1 record

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature6 records

Partnerships

One partnership is on record.

• ProViacoreChannel Partner/ Reseller/ DistributorSTL Windows and Doors is a ProVia Platinum Dealer (highest tier) and Certified Installer. They exclusively sell and install ProVia window products including Endure, Aeris, Aspect, and EcoLite series. This partnership provides access to American-made, ENERGY STAR certified windows with extensive customization options. ProVia provides factory training for installers and marketing support including brochures and product certification materials.

Scale indicators4 records

Recent moves6 records

Expansion highlights5 records

Broad incumbents

• Home Depot Window & Door Installation Services: National home-improvement retailer whose installation services business bundles window and door replacement with ProVia and other branded products. Competes with STL for replacement-window demand in St. Louis through national brand recognition, financing, and scale-driven pricing.
• Pella Windows & Doors: Major window and door manufacturer with both a national retail/showroom footprint and an installer network. Competes with STL through showrooms and certified installer programs in the St. Louis metro, though Pella's portfolio spans new construction and remodeling well beyond STL's replacement-only niche.
• Milgard Windows & Doors: Established regional window and door manufacturer (vinyl, fiberglass, aluminum) selling through dealers and home-center channels. Comparable product breadth to STL but at manufacturer scale rather than local contractor scale, with limited direct presence in the St. Louis metro.
• Marvin Windows and Doors: Premium window and door manufacturer selling through independent dealers and showrooms. Marvin's St. Louis-area dealers overlap with STL's customer base at the high end, though Marvin emphasizes custom wood/clad products rather than STL's vinyl-replacement focus.

Direct peers

• Zen Windows: Direct-sale window replacement franchise operating in multiple U.S. metros with a no-pressure in-home consult model. Comparable to STL in residential replacement focus and owner-operator local presence, though typically operating with smaller crews per territory.
• Window World: Largest direct-to-consumer window replacement franchise in the U.S. Comparable to STL in sales-led, in-home consultation GTM but competes via aggressive national advertising and budget-tier vinyl pricing rather than premium ProVia positioning.
• Champion Windows: National manufacturer and installer of replacement windows, sunrooms, and doors. Comparable to STL in direct-to-consumer in-home sales of windows and doors, with broader product breadth and home-showroom distribution.
• Renewal by Andersen: National window and door replacement franchise from Andersen Corporation. Directly comparable to STL as a full-service replacement-window specialist selling a single premium manufacturer brand (Andersen) with in-home consultation and certified installer models, though operating at vastly greater scale.
• Thompson Creek Window Company: Mid-Atlantic window and door replacement specialist with direct in-home sales and factory-trained installers. Closely comparable to STL in GTM motion (in-home consult, manufacturer-direct install), though serving a different region (DC/Mid-Atlantic).

Regional players

• Feldco: Midwest-based (Chicago) window, siding, and door replacement specialist with showrooms and in-home sales. Comparable product offering (vinyl replacement windows, entry doors) and similar family-owned positioning, but does not directly compete in the St. Louis metro.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

• YouTubeyoutube.com/channel/UC9lraWrF9NmR_ilTiOmpBug
• Facebookfacebook.com/STLWindowsandDoors
• Instagraminstagram.com/stl_windowsanddoors
• LinkedInlinkedin.com/company/stlwindowsanddoors

Compliance4 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles3 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 STL Windows and Doors by Lombardozzi Construction