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Window Replacement in St. Louis

If you’re looking for window replacement in St. Louis, Forshaw is the name homeowners and builders have trusted since 1871. As an exclusive Marvin dealer, we offer a premium selection of replacement windows—installed by our own in-house crews—at prices that consistently beat the high-pressure competition.

Whether you need a single picture window swapped out or a whole-home upgrade, we handle everything from measurement through final inspection. One company. One bill. One team that stands behind the work.

☎ (314) 993-5570   |   Schedule a Free Consultation   |   Get a Free Quote

Why St. Louis Homeowners Choose Forshaw for Window Replacement

The St. Louis window market is crowded. You’ve probably seen the TV ads, received the mailers, and maybe even sat through a high-pressure in-home sales pitch that left you with a six-figure quote and a bad taste. Forshaw is different—and homeowners across the metro area are noticing.

Exclusive Marvin Dealer — Better Pricing, Better Product

Forshaw is one of the only exclusive Marvin dealers in the St. Louis market. That exclusivity means you get the same premium Marvin windows that architects specify on luxury projects, without the inflated price tag you’d pay through a high-pressure sales model.

A Showroom You Can Actually Experience

We invested in building one of the largest window showrooms in St. Louis—a space where you can see, touch, and operate dozens of Marvin windows and doors in real living-room settings. No 2×4 frames on wheels. No pressure. Just an honest conversation about what your home needs.

Transparent Pricing — No Gimmicks

We don’t do the steak-dinner sales pitch. We don’t quote a number that magically drops if you “sign tonight.” Our pricing is straightforward and competitive—and we’re happy to walk you through exactly what you’re paying for and why. If you’ve already received a quote from a high-pressure competitor, bring it in. The conversation tends to be eye-opening.

Full-Frame vs. Insert Window Replacement: What St. Louis Homes Need

One of the most important decisions in any home window replacement project is whether you need a full-frame replacement or a simple insert. Understanding the difference can save you thousands of dollars—and years of headaches.

Insert Replacement

An insert replacement removes the old window sash and slides a new unit into the existing frame. It’s faster, less invasive, and less expensive. It works well when the existing frame is in good structural condition.

Full-Frame Replacement

Full-frame window replacement removes everything—sash, frame, trim, and all—down to the rough opening. A completely new window system goes in, including new flashing, insulation, and trim. This is what St. Louis homes actually need in cases where the original frames have experienced decades of Midwest weather cycles.

Forshaw handles both approaches and prices both options for every project. We’ll never push you toward the more expensive option if your frames are sound. But we’ll always be honest if they’re not—because a “cheaper” insert into a failing frame is no bargain.

Not sure which approach your home needs? Schedule a free consultation and we’ll assess your windows on-site.

Replacement Windows Built to Last: The Marvin Lineup

As an authorized Marvin dealer, Forshaw offers the full range of Marvin’s replacement windows in St. Louis. Every Marvin line shares the brand’s commitment to quality materials, energy efficiency, and design flexibility. Here’s a quick overview of the collections available at our showroom:

Collection	Best For	Key Features
Ultimate	Historic homes, luxury renovations, and projects requiring maximum customization	Extruded aluminum or wood exteriors, wood interiors in six species, true divided lights, 20-year factory finish, historic-district approved
Elevate	Homeowners who want fiberglass durability with the warmth of a wood interior	Ultrex fiberglass exterior, pine interior (paintable or stainable), excellent energy ratings, strong mid-range value
Modern	Contemporary architecture, large openings, and smart-home integration	High-density fiberglass frames, narrow sightlines, massive glass panels, integrated automation (Marvin Connected Home), low-gloss aluminum interior
Essential	Budget-conscious projects that still demand Marvin quality and durability	Full Ultrex fiberglass inside and out, virtually maintenance-free, streamlined style selection, eight times stronger than vinyl

Not sure which collection is the right fit? That’s exactly what our showroom and our consultation process are designed to help you figure out. We’ll walk you through real product samples side by side.

How Much Does Window Replacement Cost in St. Louis?

The cost to replace windows in St. Louis varies depending on a few key factors: the number of windows, the type of replacement (insert vs. full frame), the product line you choose, and the complexity of your installation.

At Forshaw, we believe in transparent, straightforward pricing. We don’t inflate quotes with hidden fees, and we don’t offer “one-day-only” discounts designed to pressure you into signing before you’ve had time to think.

Here’s what drives the cost of a window replacement project:

Product Selection

Marvin’s Essential line is the most accessible entry point, while the Ultimate collection offers the highest level of customization for historic and luxury homes. Most St. Louis homeowners find the Elevate collection to be an exceptional balance of performance, aesthetics, and value.

Replacement Type

Full-frame replacements involve more labor and materials than insert replacements, but they also address underlying issues like rot, failed flashing, and poor insulation that inserts leave untouched. We price both options so you can make an informed comparison.

Home-Specific Factors

Window size, accessibility (second and third floors cost more to reach), the age of your home, and any structural surprises behind the existing trim all play a role. We identify these during our free on-site consultation—before you commit to anything.

Get a transparent quote with no surprises. Call (314) 993-5570 or request your free estimate online.

Our Window Replacement Process

From first conversation to final walkthrough, here’s what window replacement with Forshaw looks like:

1. Consultation & Assessment

We start with a free, no-obligation visit to your home to help you evaluate when to replace your windows. Our team evaluates the condition of your existing windows and frames, takes measurements, and discusses your goals—whether that’s energy savings, curb appeal, noise reduction, or all of the above. We’ll recommend insert or full-frame replacement based on what your home actually needs.

2. Product Selection

Visit our St. Louis showroom to see and operate Marvin windows in person. Compare collections side by side, explore color and finish options, and ask as many questions as you want. No pressure, no time limit.

3. Transparent Quote

We provide a detailed, written estimate that breaks down product costs, installation, and any structural work required. We price full-frame and insert options when both are viable, so you can compare.

4. Professional Installation

Our own trained installation crews handle the work. We protect your home during the process, install to Marvin’s specifications, and clean up when we’re done.

5. Final Walkthrough & Warranty

We walk through every window with you, demonstrate operation and locking mechanisms, and make sure you’re completely satisfied. Your new Marvin windows are backed by one of the strongest warranties in the industry.

Window Replacement Across the St. Louis Metro

Forshaw provides replacement windows throughout St. Louis City and the surrounding communities. Every neighborhood has its own architectural character and its own window replacement needs. Here are some of the areas we serve:

West County	Central Corridor	West & Northwest
Chesterfield Ballwin Wildwood Des Peres Town and Country Frontenac	Clayton Ladue Kirkwood Webster Groves University City	St. Charles St. Peters O’Fallon Wentzville

Each community’s housing stock has unique characteristics that influence the best replacement approach. Older homes in Kirkwood and Webster Groves may need full-frame replacement to address decades of settling and weather exposure. Newer homes in Ballwin, built during periods when builders favored lower-cost materials, often need replacement sooner than homeowners expect. Historic districts in Clayton and Ladue may require Marvin’s Ultimate collection for its true divided lights and approved period detailing.

About Forshaw of St. Louis

Forshaw has been a family-owned St. Louis business since 1871—over 150 years of serving this community. What started as a small cabinet-making shop has grown into one of the region’s most trusted names in home products, including fireplaces, outdoor living, and now premium windows and doors.

Our entry into the window and door market is backed by the same values that have carried us for five generations: quality craftsmanship, honest pricing, and genuine care for the people we work with. As an exclusive Marvin dealer, we bring a level of product expertise and pricing advantage that’s rare in the St. Louis market.

Ready to talk about your project? Call (314) 993-5570  |  Schedule a Free Consultation  |  Get a Free Quote

Frequently Asked Questions About Window Replacement in St. Louis

Here are answers to the questions St. Louis homeowners ask us most often:

Q: How much does window replacement cost in St. Louis? The cost depends on several factors, including the number of windows, the Marvin collection you choose, and whether you need insert or full-frame replacement. Forshaw provides transparent, itemized quotes with no hidden fees and no high-pressure sales tactics. We also price both insert and full-frame options when applicable so you can make an informed decision. Contact us for a free estimate tailored to your home.

Q: What’s the difference between insert and full-frame window replacement? Insert replacement removes the old sash and places a new window inside the existing frame. Full-frame replacement removes everything—frame, trim, and all—and installs a completely new window system. Most St. Louis homes, particularly those built before the mid-2000s, benefit from full-frame replacement because the original frames have endured decades of extreme temperature swings, moisture, and settling. Forshaw assesses your frames during a free consultation and recommends the right approach for your situation.

Q: Why should I choose Marvin windows over other brands? Marvin is one of the most respected window manufacturers in North America. Their windows are built with premium materials—fiberglass, extruded aluminum, and real wood—rather than the vinyl components used by many competitors. Marvin offers some of the best energy efficiency ratings in the industry, a 20-year factory finish on their Signature Ultimate line, and an unmatched range of styles and customization options. As an exclusive Marvin dealer, Forshaw purchases at Marvin’s best pricing tier and passes that savings to you.

Q: How long does a window replacement project take? Timeline depends on the scope of the project. A typical whole-home window replacement—from consultation through completed installation—takes a few weeks from order to finish. Installation itself usually takes one to several days depending on the number of windows and complexity of the work. We’ll give you a detailed timeline before any work begins.

Q: Do you offer a window showroom in St. Louis? Yes. Forshaw operates one of the largest window showrooms in the St. Louis area, featuring dozens of Marvin windows and doors in built-in, operable displays set in real living-room-style environments. It’s the best way to compare collections, see finishes in person, and understand the difference between products before you buy.

Q: What areas do you serve in the St. Louis metro? Forshaw serves homeowners throughout the St. Louis metropolitan area, including Chesterfield, Kirkwood, Webster Groves, Clayton, Ladue, Ballwin, St. Charles, Frontenac, Wildwood, Des Peres, University City, Town and Country, and surrounding communities.

☎ (314) 993-5570   |   Schedule a Free Consultation   |   Get a Free Quote

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