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If you’re shopping for Marvin windows in St. Louis, you’ve already done some homework. You know Marvin builds some of the best windows in North America—real wood interiors, fiberglass and aluminum exteriors, energy performance that exceeds industry standards. The question now is where to buy them and who’s going to handle the installation.

Forshaw is an exclusive Marvin dealer in St. Louis. We carry the full Marvin lineup—Ultimate, Elevate, Vivid, Modern, and Essential—and we’ve invested in building one of the largest window showrooms in the area so you can see, touch, and operate these products before making a decision. We manage the process from consultation through installation: one company, one bill, one point of contact.

Why Buy Marvin Windows Through Forshaw

There are several ways to purchase Marvin windows in the St. Louis area. You can buy through a building supply company, through a general contractor, or through a dedicated dealer. Here’s why working with Forshaw is different:

A Showroom Built Around Marvin

Most places that sell Marvin display a few samples on rolling frames in a warehouse setting. Forshaw built a dedicated showroom with operable Marvin windows and doors installed in living-room-style displays—so you can experience the products the way they’ll actually look and function in your home. It’s the best way to compare collections side by side.

Consultation Through Installation

Some dealers sell windows but don’t handle installation. Others install but source from multiple brands and don’t know any of them deeply. Forshaw focuses exclusively on Marvin, and we manage every phase of your project—from the first conversation through the final walkthrough. When something needs attention, you call us. There’s no third party to chase down.

150+ Years of St. Louis Trust

Forshaw has been a family-owned business in St. Louis since 1871. We built our reputation in hearth and outdoor living, and we’re bringing five generations of quality standards to the window market. We’re not a startup or a franchise—we’re a local company with deep roots in this community.

Transparent, No-Pressure Pricing

We don’t do high-pressure sales. There’s no in-home pitch that ends with a “sign-tonight” discount. We give you a detailed, written estimate and let you make your decision on your own timeline. If you’ve received a quote from another company, bring it in—we’re happy to have an honest conversation about what you’re comparing.

The Marvin Window Collections Available at Forshaw

Marvin organizes its windows into distinct collections, each designed for different architectural styles, performance requirements, and budgets. All Marvin windows share a commitment to premium materials, energy efficiency, and design flexibility that sets them apart from mass-market brands. Here’s what you’ll find at our showroom:

Marvin Ultimate

Maximum customization for historic, traditional, and luxury homes

The Ultimate collection is Marvin’s flagship line—and the one that architects and designers most frequently specify for high-end residential projects. It offers the widest range of styles, sizes, shapes, and finishes in Marvin’s portfolio.

Exterior	Extruded aluminum clad (11 standard colors, custom colors available) or all-wood
Interior	Real wood in six species—factory painted, stained, or bare for field finishing
Factory Finish	20-year standard finish warranty
Key Detail	True divided lights (ADLs) and historic-district-approved profiles available
Window Styles	11 styles with 26 variations, including double-hung, casement, awning, specialty shapes, and push-out
Best For	Historic renovations, luxury homes, custom builds, and projects that require maximum design flexibility

Marvin Elevate

Fiberglass strength meets warm wood interiors

The Elevate collection is where many St. Louis homeowners land—it delivers an exceptional balance of performance, aesthetics, and value. The window’s fiberglass exterior handles Missouri’s temperature extremes without expanding, contracting, or deteriorating, while the pine interior brings the warmth that vinyl and aluminum can’t match.

Exterior	Ultrex pultruded fiberglass—dimensionally stable, paintable, available in six colors
Interior	Pine—available in white, black, clear coat, or bare wood for custom staining
Performance	Fiberglass is eight times stronger than vinyl and won’t warp, pit, or corrode
Key Detail	Significantly less expensive than Ultimate while still offering real wood interiors
Best For	Homeowners who want the look and feel of wood inside with low-maintenance, weather-resistant fiberglass outside

Marvin Modern

Clean lines, massive glass, and smart-home integration

If your home has a contemporary aesthetic—or you’re building one—the Modern collection is purpose-built for you. It’s designed as a modular system where every product works together, creating consistent narrow sightlines that maximize natural light and minimize visual distraction.

Exterior	High-density fiberglass with superior thermal performance
Interior	Extruded aluminum with a low-gloss finish—five interior colors available
Automation	Marvin Connected Home: voice control, customizable schedules, rain detection and auto-close
Key Detail	Industry-leading sizes for oversized openings; push-out casement option
Best For	Contemporary architecture, walls of glass, indoor-outdoor living spaces, and homeowners who want integrated smart-home technology

Marvin Essential

Marvin quality at an accessible price point

The Essential collection proves that “budget-friendly” and “High quality” don’t have to be mutually exclusive. These windows use Marvin’s proprietary Ultrex fiberglass on both the interior and exterior, making them virtually maintenance-free and significantly stronger than vinyl alternatives.

Exterior	Ultrex fiberglass—six exterior colors
Interior	Ultrex fiberglass—four interior colors
Performance	Eight times stronger than vinyl; won’t warp, rot, or corrode
Key Detail	Streamlined style and size selection simplifies ordering and speeds up turnaround
Best For	Budget-conscious projects, rental properties, and homeowners who prefer a maintenance-free interior over wood

All four Marvin collections are on display in our showroom. Seeing and operating them in person is the fastest way to understand the differences—photos and spec sheets only tell half the story.

Visit our showroom or schedule a consultation: (314) 993-5570

A Note on Infinity by Marvin

If you’ve been researching Infinity by Marvin in St. Louis, it’s worth understanding how it fits into the broader picture. Infinity is Marvin’s insert-focused replacement brand—it uses the Ultrex fiberglass material from Marvin’s other lines, but it’s sold and installed through a separate dealer network using a different sales model.

Infinity dealers typically focus on insert replacements: removing the old sash and sliding a new unit into the existing frame.

Forshaw carries the full range of Marvin collections—including models that work as inserts—but we also offer full-frame replacement. If you’re weighing Infinity against a full Marvin product with full-frame installation, we’re happy to walk you through the comparison.

How Marvin Compares to Other Window Brands

If you’re cross-shopping Marvin against other brands, you’re not alone. Here’s a quick overview of how the most common comparisons shake out in the St. Louis market:

Marvin vs. Pella

Pella is the largest window company in the St. Louis market, with a strong presence in new construction. Their Reserve line competes with Marvin’s Ultimate, and their Lifestyle line competes with Marvin’s Elevate—but the materials and construction differ in important ways. At the Elevate/Lifestyle level in particular, the difference between Marvin’s pultruded fiberglass and Pella’s thin roll-formed aluminum cladding is significant. We have both products in our showroom reference materials and can walk you through the comparison.

Marvin vs. Renewal by Andersen

Renewal by Andersen operates on a high-pressure, in-home sales model focused on insert replacements. Their pricing reflects that sales model. If you’ve received a Renewal by Andersen quote, it’s worth comparing what you’d get through Forshaw with a full Marvin product—often with full-frame installation included—before making a decision.

Your Local Marvin Dealer Serving the St. Louis Metro

Forshaw serves homeowners throughout the St. Louis area, including Chesterfield, Kirkwood, Webster Groves, Clayton, Ladue, Ballwin, St. Charles, St. Peters, Frontenac, Wildwood, Des Peres, Town and Country, and University City.

Whether you’re replacing windows in a 1920s Clayton bungalow that needs historic-appropriate detailing or upgrading a contemporary Chesterfield home with floor-to-ceiling glass, we have the Marvin collection and the local expertise to match.

Frequently Asked Questions About Marvin Windows in St. Louis

Q: Is Forshaw an authorized Marvin dealer? Yes. Forshaw is an exclusive Marvin dealer in St. Louis, carrying the full range of Marvin window and door collections: Ultimate, Elevate, Modern, and Essential. Marvin lists Forshaw as a dealer on their website.

Q: Can I see Marvin windows in person before buying? Absolutely. Forshaw operates one of the largest window showrooms in the St. Louis area, with operable Marvin windows and doors installed in real-world settings. It’s the best way to compare collections, feel the materials, and understand the differences between product lines.

Q: What’s the difference between Marvin’s collections? Marvin offers four main collections. Ultimate is the flagship—maximum customization, true divided lights, and historic-district approvals. Elevate pairs a fiberglass exterior with a wood interior for a strong balance of durability and aesthetics. Modern is designed for contemporary architecture with narrow sightlines, oversized glass, and smart-home integration. Essential uses all-fiberglass construction for low-maintenance durability at an accessible price point.

Q: How does Marvin compare to Pella? Both are premium brands, but they differ in materials and construction. At the mid-range level, Marvin’s Elevate uses pultruded fiberglass while Pella’s Lifestyle uses thin roll-formed aluminum over wood. At the high end, Marvin’s Ultimate and Pella’s Reserve are closer in quality, though Marvin offers a 20-year factory finish standard where Pella charges extra for the same coverage (Pella’s standard is 10 years). We can walk you through a detailed comparison at our showroom.

Q: What is Infinity by Marvin? Infinity by Marvin is Marvin’s insert-replacement brand, sold through a separate dealer network. It uses Marvin’s Ultrex fiberglass material but focuses on insert replacements. Forshaw carries the full Marvin lineup and offers both insert and full-frame options, which gives you flexibility depending on what your home needs.

Q: Does Forshaw handle Marvin window installation? Yes. Forshaw manages the entire process from product selection through installation. We don’t just sell the windows and hand off the install to a separate company—we’re accountable for the whole project. One company, one bill, one point of contact.

Q: Are Marvin windows energy efficient? Yes. Marvin windows meet or exceed Energy Star requirements and are built with low-E glass coatings, insulating gas fills, and advanced frame materials. Their fiberglass and wood-clad frames provide significantly better thermal performance than vinyl. The specific energy ratings vary by collection and glass package—we can help you choose the right configuration for your home’s needs.

Q: What areas does Forshaw serve as a Marvin dealer? Forshaw serves the entire St. Louis metropolitan area, including Chesterfield, Kirkwood, Webster Groves, Clayton, Ladue, Ballwin, St. Charles, St. Peters, Frontenac, Wildwood, Des Peres, Town and Country, University City, and surrounding communities.

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