Bow Window Installation

Looking for bow window installation in St. Louis? Get The Intersection of Price and Quality with a local, family‑owned team that’s been serving St. Louis homeowners for 28+ years. Start with a quick, no‑pressure consultation and a clear, written quote—no gimmicks.

Want the light and extra space of a bow window without a hard sell? At Viviano Window & Door, you get efficient products, clear pricing, and careful installation. As a local family business, we work with several trusted manufacturers, including Sunrise and Polaris, so your bow window fits your home, budget, and Missouri’s climate—not a brand quota. We’ll help you choose glass, colors, grids, and hardware that match your style, with ENERGY STAR–qualified options available.

• Local and family‑owned for 28+ years
• Energy‑efficient options to cut drafts and help lower utility bills
• No one‑call close or commission‑driven sales
• Professional, insured installation focused on fit, air sealing, and a clean finish
• Full‑frame or insert installation based on your home’s needs
• Honest, itemized quotes; financing options and current specials available

Ready to get started? Call 314‑353‑8350 to discuss your project or schedule a low‑pressure visit, or request a Free Quote online. Prefer to see options in person? Visit our showroom at 7530 Watson Rd, Shrewsbury, MO 63119, Monday–Friday, 8:00 a.m.–4:00 p.m. Bring a few photos and rough sizes and we’ll help you ballpark pricing on the spot.

What Is a Bow Window?

A bow window is a projection made from several narrow window units—typically four to six—joined to create a gentle curve. It brings in more light, widens the view, and adds an interior ledge or seat. Not sure if a bow will fit your space or budget? We’ll measure, talk through options, and give you a straightforward, no‑pressure estimate. Call 314‑353‑8350 or request a Free Quote to get started.

Common configurations

• Fixed center with operable flankers: a large fixed picture unit in the middle with casement or double‑hung windows on the ends for ventilation—great airflow without losing that big, clear view
• All casement: every panel opens for maximum airflow and easy operation
• All fixed: non‑operable panels for a clean look and top thermal performance
• Mixed lite widths: uniform or varied panel widths to suit your opening and style; we’ll help you pick proportions that look intentional inside and from the curb

Bow vs. bay at a glance

• Shape: Bow looks curved; Bay is faceted with angled sides
• Panel count: Bow usually has 4–6 narrower panels; Bay commonly has 3 larger panels
• Look and footprint: Bow gives a softer, continuous line and often spans wider openings; Bay projects more sharply and can feel deeper for the width

Prefer the faceted look or a deeper projection? Explore our Bay Window Installation page: https://viviano-inc.com/?page_id=41593. Or stop by our Shrewsbury showroom at 7530 Watson Rd to compare styles and touch samples—no appointment or sales pressure needed.

Why Homeowners Choose Bow Windows

A bow window curves outward with four to six panels to pull in light from multiple angles—instantly making rooms feel brighter and more open. Whether you face a garden, a tree‑lined street, or a backyard, a bow showcases the view and elevates curb appeal.

• Adds usable space: Turn the deep sill into a reading nook, seat, or spot for plants and décor—great for making a small room feel bigger without a full remodel.
• Boosts curb appeal: The graceful curve becomes a focal point on classic brick homes, mid‑century ranches, and newer builds alike.
• Ventilation on demand: Choose operable end units for fresh air while center panels maximize the view. Screens keep it comfortable.
• Quieter rooms: Optional laminated or acoustic glass helps reduce street noise for a more peaceful living space. Learn more: how replacement windows reduce outside noise.

Where they shine around St. Louis: living rooms that need seating and sunlight, dining rooms that benefit from an open feel, and front elevations where you want a welcoming statement and more natural light. Not sure whether a bow or bay is the better fit? We’ll compare both styles and pricing side‑by‑side so you can choose with confidence—no high‑pressure sales.

Concerned about comfort and energy use with more glass? See the next section for glass and frame options suited to Missouri’s four seasons—or get personalized recommendations during your free, no‑pressure quote. Call 314‑353‑8350 or stop by our Shrewsbury showroom at 7530 Watson Rd (Mon–Fri, 8–4). Ask about current specials and value‑focused options that fit your budget.

Energy Efficiency for St. Louis Weather

St. Louis swings from humid 90s to freeze‑thaw winters, and bow windows face that sun and wind. We help you pick glass and frames that limit summer heat gain, hold heat in winter, and stay clear year‑round. During your free, no‑pressure quote, we review the NFRC label so you can see how U‑factor and SHGC align with your home’s orientation and goals. Learn more: NFRC ratings.

• Low‑E glass packages for St. Louis: Modern coatings reflect summer heat and keep winter warmth inside while preserving daylight—and can help protect floors and furnishings from fading. See: UV protection and fading.
• Warm‑edge spacers with argon or krypton gas: Warm‑edge spacers reduce heat transfer at the glass edge and help limit edge condensation. Most projects use argon for value and performance; krypton is available for tight airspaces or maximum efficiency. Compare gases: Argon vs. Krypton. Not sure on pane count? Double‑ vs. triple‑pane compared.
• Foam‑insulated frames and tight air sealing: Optional foam‑enhanced vinyl frames add thermal resistance. We pair that with careful air sealing at install using low‑expansion foam and sealed transitions to cut drafts and reduce condensation risk.
• ENERGY STAR and potential tax credit: We offer ENERGY STAR packages for the North‑Central zone. Qualifying purchases may be eligible for a federal Section 25C tax credit up to $600, subject to IRS rules. Ask us for product documentation and consult your tax advisor. Details: ENERGY STAR approval

For a deeper dive into glass types and upgrades, see Replacement Window Glass Options Explained for Homeowners.

Want to zero in on the best package for your home? Call 314‑353‑8350 or request a free quote at https://viviano-inc.com/free-quote/. Prefer to chat in person? Stop by our showroom at 7530 Watson Rd, Mon–Fri 8–4—no commissioned sales, just clear answers.

Our Bow Window Installation Process

From first measure to final walkthrough, we keep your project smooth, secure, and clean—so your new bow window looks like it’s always belonged.

1. In‑home consultation and precise measurements

   • We confirm width, projection or curve, and number of lites.
   • You choose venting options, glass and energy package, colors, grilles, and seatboard material—no‑pressure guidance, samples, and clear pricing.
   • We document interior trim, wall depth, and exterior conditions for a clean, factory‑fit look.

   Why precision matters: accurate measurements before you order and what happens if a window is ordered the wrong size.

2. Site assessment and approvals

   • We review structure, wall type, and check for moisture or prior leaks.
   • We note eaves and soffits for roof or canopy clearance and flag any HOA or permit needs (we’ll help you navigate what’s required). Learn more
   • Homes built before 1978 are handled under EPA Lead‑Safe practices when required for your family’s safety.

3. Custom ordering and lead times

   • After you approve specs, we place a custom order with the best‑fit manufacturer for your goals and budget.
   • Typical lead times run several weeks. We share an expected ship/installation window and keep you updated throughout. Turnaround time

4. Jobsite preparation

   • We protect floors and pathways, set up dust containment, and coordinate removal of furniture, blinds, and drapery with you. Prep details
   • We protect nearby landscaping where feasible. Your home stays tidy from start to finish.

5. Careful removal and opening prep

   • We remove the old unit, assess the rough opening, repair damaged wood, and set up water management with a sloped sill or pan flashing. How pros prevent leaks
   • If we uncover hidden issues, we show you and discuss options before proceeding—no surprises.



6. Engineered support system

   • We install the correct head and seat board and integrate specified through‑cables or rods to secure the projection.
   • When needed, we plan for knee braces or a small roof or canopy for long‑term stability.

7. Set, level, and insulate

   • We dry‑fit, shim, square, and fasten the unit to spec.
   • We air‑seal the perimeter with low‑expansion foam while maintaining weep paths to keep drafts out and performance high.

8. Flash and weatherproof

   • We use sill pans, self‑adhered flashings, and a drip cap, tied into the WRB or masonry details to direct water away and help prevent future leaks. Leak‑prevention details

9. Exterior finishing

   • We fit color‑matched exterior trim or aluminum capping for a clean, finished look.
   • Roof or canopy kits are flashed and shingled. Knee braces are installed if specified.

10. Interior finishing and performance checks

    • We complete interior casing, finish the seatboard for paint or stain, and caulk.
    • We operate and adjust sashes and locks, verify seals, and check for smooth operation and weathertightness.

11. Cleanup and walkthrough

    • We vacuum, remove debris, and haul away old materials. Old window disposal
    • We review care, maintenance, and warranty info and make sure you’re comfortable operating your new window.

Some projects need added structural or safety steps, such as a roof or canopy, knee braces, tempered glass, or lead‑safe work on older homes. During your site assessment, we’ll confirm if any apply and include them in your quote upfront.

Ready to get started or just exploring options? Call us at 314‑353‑8350 to book a free, no‑pressure estimate, or stop by our showroom at 7530 Watson Rd, Shrewsbury, MO (Mon–Fri, 8–4).

Structural, Code, and Safety Considerations

Bow windows extend beyond the wall, so planning for load path, water, and code compliance matters. During your in‑home assessment, we confirm support and safety needs before ordering. It’s a quick, no‑pressure visit that helps prevent surprises in cost or schedule—call 314‑353‑8350 to set up a convenient time.

When added support or framing is recommended

• Roof kits or canopies: Useful on upper stories or exposed walls to shed water and snow away from the headboard and siding.
• Overhead cable or rod support: Many bows use internal steel rods or exterior support cables tied into solid framing.
• Knee braces: Common on deeper projections or where there’s no overhead structure.
• Framing below the seat: Larger units or enlarged openings may need studs or a new header and cripple assembly.
• Masonry facades: We check brick or stone lintels for condition and size. Anchoring and sealing differ from wood or siding to protect the veneer and structure.

Considering enlarging an opening or adding a new one? Read: When you need structural planning before adding or enlarging windows.

Tempered safety glass locations

Codes often require tempered glass near doors, low to the floor, or around wet areas and stairs. Examples include sidelites close to doors, glass with a low bottom edge, and glazing near tubs, showers, or stairs. See our guides: What is tempered glass and when is it required? and When do building codes require tempered windows? We’ll flag any tempered locations during your visit so there are no surprises.

Lead‑safe work in pre‑1978 homes

For homes built before 1978, we follow EPA lead‑safe practices to minimize dust, contain the area, and clean thoroughly. Learn more: Lead paint and window replacement and Lead‑paint regulations. When you call to schedule, let us know your home’s age so we can plan the safest approach.

Masonry and stucco require special waterproofing

Brick, stone, and stucco drain and move differently than siding. We use appropriate sealants, backer rod, pans, flashing tapes, and weep strategies to manage water at the head, jambs, and seatboard. Read more: Why masonry and stucco need special treatment. We’ll explain the waterproofing plan for your wall type before work begins.

Permits and HOA approvals

New or enlarged openings, structural changes, or added electrical may require permits, and many neighborhoods need HOA approval. We help you navigate requirements, provide specs and insurance documents, and clarify who secures what in your municipality. Start here: HOA approvals and permits.

Styles, Options, and Brands We Carry

Every bow window is built to your home and priorities—without a one‑brand push. Tell us what matters most (view, ventilation, seat depth, energy savings, or budget), and we’ll compare proven lines like Sunrise and Polaris alongside other quality manufacturers. We’ll lay out a clear good/better/best set of options so you can choose confidently—no pressure. Call 314‑353‑8350 or request a no‑obligation quote: https://viviano-inc.com/free-quote/. Ask about current promotions and financing: financing options. Comparing materials? See composite vs. vinyl, fiberglass, and wood and which frame material lasts the longest.

Configuration choices

• Four to six lites create the curve; most homeowners choose four or five for the best balance of view and projection.
• Venting: Keep the center panel fixed for the widest view and add operable flankers at the ends for fresh air. All operable units include matching screens.
• Screens: Standard fiberglass, low‑visibility mesh, and pet‑resistant upgrades vary by brand.
• Working with older or non‑standard openings? See Custom‑Size Replacement Windows for Older Homes.

Interior finishes, seat, and head boards

• Seat and head boards: Choose stain‑grade hardwoods (oak, maple, birch) or paint‑grade options. Many lines offer insulated seat boards for comfort.
• Finish your way: Get stain‑ready or paint‑ready components from the factory, or go unfinished to match on site. Ideas: Finishes
• Considering wood interiors? Are wood‑clad windows worth it?

Colors and exterior style

• Coordinate inside and out with popular neutrals, deeper hues, and wood‑look interiors. Explore options: Color System
• Color‑matched exterior capping and trim kits available on many series.

Glass, grilles, and hardware details

• Grilles: Between‑the‑glass or simulated divided lites. Patterns include Colonial, Prairie, Perimeter, and custom.
• Decorative/obscure glass: Privacy, laminated, tinted, and UV‑control options. Examples: Glass examples
• Hardware: Finishes such as matte black, oil‑rubbed bronze, brushed nickel, or color‑matched options.
• Not sure which glass is right? Replacement Window Glass Options Explained

Comfort and convenience options

• Integrated blinds between the glass in select sizes and series
• Factory‑installed security sensors and wiring preps (brand‑dependent)
• Screen upgrades where compatible

See and try the options in person
Visit our showroom to operate casement cranks, compare glass packages, and view color chips and wood species:
Viviano Window & Door, 7530 Watson Rd, Shrewsbury, MO 63119. Monday–Friday, 8:00 a.m.–4:00 p.m.
Call 314‑353‑8350 for current displays or to reserve a consultation, or start with a quick no‑obligation quote online: Free Quote.

Timeline and What to Expect

Here’s how a typical bow window project with Viviano Window & Door unfolds, and what we ask from you so install day goes smoothly. If you’re ready to get your project on the calendar, call 314‑353‑8350 or request a free, no‑pressure estimate at https://viviano-inc.com/free-quote/.

Typical timeline

• In‑home consultation and quote: We confirm goals, measure, discuss options, and provide a clear proposal. What happens during a free estimate
• Final measure and ordering: After approval, we take production‑level measurements and place a custom order. Turnaround time
• Installation: Most bows take 1–2 days. Larger openings or added roofing/trim can extend this. Installation timing

Homeowner prep

• Clear access: Provide about 6–8 feet inside and 3–4 feet outside; move furniture and décor where possible.
• Window treatments: Take down blinds, curtains, and valances ahead of arrival. Details
• Pets and security: Secure pets and note any alarm sensors.
• Driveway and yard: Reserve a spot for our vehicle and clear outdoor items near the work area.
• More prep tips

Where we’ll be working

• Inside and outside: Bow windows require both. We protect floors and furnishings and remove debris daily. Inside work and Inside vs. outside install
• Winter installations: Yes, we install year‑round and minimize heat loss with efficient sequencing and sealing. Winter replacement

Communication you can count on

• Scheduling: You’ll receive a target week when we order, then a confirmed date once the factory provides ship status. We reconfirm the business day prior.
• On‑site walkthroughs: Your crew lead reviews the plan each morning and walks the completed project with you.
• Daily cleanup: We vacuum interior areas, sweep outside work zones, and remove old windows and packaging. Old window disposal
• Longer scopes: If a roof kit, knee braces, or structural changes are needed, we discuss permit or HOA steps up front. Permits and HOA

Comparing timelines usually leads to cost. Here’s what drives price and how we keep it fair: Window replacement cost in St. Louis. Ask about current specials or financing options during your consultation: Specials and Financing.

Pricing and Value—No High‑Pressure Tactics

Every bow window project is priced to your home—not a one‑size package. We’ll review the factors below, take precise measurements, and then give you a clear, line‑item quote with a couple of smart options so you can choose what fits—no 3‑hour pitch, no one‑call close.

Key factors include

• Unit size and projection depth
• Number of lites/panels and which ones vent
• Glass package, including Low‑E type, gas fills, and spacer upgrades
• Finish work, such as exterior capping, interior casing, and staining or painting
• Structural needs, including cable or rod support, upgraded head and seat boards, roof/canopy kits, or knee braces
• Interior upgrades, such as insulated seat boards or shelves
• Wall conditions (brick, stone, stucco) and related flashing/sealing
• Installation method (insert vs. full‑frame) and any opening modifications

Why bows cost more than flat windows

A bow window is a small engineered projection. It uses multiple connected frames, a curved layout, reinforced support, custom head and seat boards, detailed weatherproofing, and more finish carpentry. That material and labor create the panoramic look and explain the higher cost compared with a single flat unit of similar width. We’ll show where your dollars go and how to tailor features—like venting, glass, and finishes—to balance look and budget.

Our value approach

As a family‑owned St. Louis dealer, we keep overhead low and source from multiple trusted brands, including Sunrise and Polaris, so you get the right product at a fair price. Ask us to compare options side‑by‑side so you can see the value. More money in your windows, less in our pocket. That’s The Intersection of Price and Quality.

Promotions and ways to pay

• See current offers: Specials
• Explore payment methods and financing: Financing options and Payment methods

Get a price you can trust: For accuracy, share a few photos inside and outside, approximate sizes, and your goals (seat, venting, color). Upload everything on our Free Quote page. Prefer in person? We’re happy to visit for a low‑pressure in‑home consultation, or you can stop by the showroom at 7530 Watson Rd, Shrewsbury, Mon–Fri 8–4. Call 314‑353‑8350 and we’ll tailor options to your home and budget.

Warranties, Service, and Care

Your new bow window comes with strong manufacturer warranties, our local workmanship coverage, and simple care tips—so you enjoy the view, not the fine print. Have questions as you compare models? We’ll walk you through coverage during a no‑pressure estimate.

What the manufacturer warranties typically cover

• Frame and sash materials against manufacturing defects
• Insulated glass unit seal failure that causes fogging between panes
• Hardware and operational components, including locks, balances, and cranks
• Factory‑applied finishes and exterior color where applicable

Length of coverage, glass breakage protection, and transferability vary by line. Ask your estimator to review the current written warranty for your model. Overview: Do replacement windows come with a warranty?

Our workmanship coverage and how to request service

• If an issue stems from our work—such as air or water infiltration or trim and caulk separation within the workmanship period—we’ll make it right.
• Need service? Call 314‑353‑8350 or use Contact Us. Have your name, address, approximate install date, and photos ready.
• Tip: Keep your order paperwork and note window labels or serial numbers for manufacturer claims.

Care and cleaning made easy

• Clean vinyl and glass with mild dish soap and water and a soft cloth. Avoid harsh chemicals, razor blades, and pressure washers.
• Keep weep holes clear, check exterior caulk annually, and lightly lubricate moving parts with a silicone‑based product as needed.
• Full guide: Window cleaning tips

What happens to your old windows

• We can remove and haul away your old windows, and recycle materials when possible. Details: Old window disposal

Recent Bow Window Projects Near You

See how a well‑planned bow window brightens a room and lifts curb appeal. Here are a few recent projects by our professional installers across St. Louis. If one of these looks like your home, we can tailor a bow to your opening, roof overhang, and budget—start with a free, no‑pressure estimate.

• Shrewsbury – Brick bungalow: Replaced an aging picture window with a 5‑lite vinyl bow with casement flankers, insulated head and seat board, and an oak‑stained seat for a reading nook.
• Webster Groves – 1920s Tudor Revival: Custom 4‑lite bow in deep bronze to match historic trim, birch interior seat, discreet cable support and flashing tucked under the soffit.
• Tower Grove South – 1930s Four‑Square: Gentle‑curve 6‑lite bow with Low‑E and argon glass and a warm‑edge spacer; masonry opening preserved with new exterior trim and sill detail.
• Kirkwood – Mid‑century ranch: Converted a wide slider to a 4‑lite bow to add dimension to a long facade; insulated knee braces painted to match the gable; white laminate seat for easy upkeep.
• Chesterfield – Two‑story Colonial: 5‑lite bow with colonial‑grid center picture unit; interior paint‑grade seatboard ready for the homeowner’s finish.
• Maplewood/Richmond Heights – Craftsman: Compact 4‑lite bow tailored to narrow overhangs; exterior color matched to existing trim for a seamless look.

We work throughout St. Louis City and County, including Shrewsbury, Webster Groves, Kirkwood, South City, The Hill, Clayton, Brentwood, Maplewood, Affton, Oakville, Ballwin, Chesterfield, Creve Coeur, University City, Maryland Heights, Florissant, St. Charles, St. Peters, O’Fallon, and more. Not sure if we come to you? Call 314‑353‑8350—if you’re in the metro area, we likely do.

Want more ideas? See our Galleries or browse featured installs in our Our Work Gallery.

See Our Work Gallery

Bow Window FAQs

Bow vs. bay: which should I choose?

A bow uses 4–6 equal units to create a gentle curve that floods a room with light and broad views, usually with a shallower projection. A bay uses three units set at angles, often a center picture window with venting flankers, for a deeper seat and more pronounced projection. We’ll help you decide based on wall width, overhangs, seating depth, and your home’s style.

How long does installation take and will you need to work inside?

Most bow installations take 1–2 days, depending on size, finish work, and whether structural support is added. We work both outside and inside for fastening, insulating, sealing, and trim, and we keep you updated on timing and daily cleanup. Timing details: Install time and Inside work. Lead times: Turnaround time.

Do I need a permit or HOA approval?

Enlarged openings, new projections, or exterior changes may need a permit or HOA approval. We guide you and provide documentation to streamline approvals. More: Permits and HOA.

Can you add a new bow where there isn’t one or make an opening bigger?

Yes, with proper structural planning and sometimes engineering. We’ll review feasibility on site and outline the steps, timeline, and cost impact before you commit. Start here: Adding a window, Making a window bigger, and Structural planning.

What energy ratings should I look for and can I claim tax credits?

Focus on a low U‑Factor, an SHGC suited to our climate, and ENERGY STAR certification. See ENERGY STAR windows and NFRC ratings (and compare double‑ vs. triple‑pane). Many qualifying upgrades may be eligible for the federal Energy Efficient Home Improvement Credit (IRS 25C), currently up to 30% of product cost, capped at $600 per year for windows. Consult your tax professional.

Will window replacement damage interior trim or drywall?

With insert installations, existing trim is often preserved with minimal touch‑ups. Full‑frame projects may include new interior and exterior finishing. Details: Trim and drywall.

Do you use replacement or new‑construction units for bows?

Most remodels use replacement‑style bow systems designed for retrofit with proper support, insulation, and flashing. If we reframe or change the exterior, new‑construction flanges may be appropriate. See Replacement vs. new‑construction and Using new‑construction windows for replacement.

What’s the maximum practical size for a bow window?

It depends on manufacturer limits, glass package, number of lites, support needs, and site conditions. We confirm what’s safe and code‑compliant during measurements. Context: Maximum window size.

Have other questions or want ballpark pricing? Talk with a friendly specialist at 314‑353‑8350, visit our showroom at 7530 Watson Rd, Shrewsbury, MO 63119 (Mon–Fri, 8:00 a.m.–4:00 p.m.), or request a Free Quote. Ask about current specials: Specials.

Visit Our Shrewsbury Showroom or Schedule a No‑Pressure Estimate

See bow window options up close and talk with a knowledgeable product specialist at our local showroom—or let us come to you for a quick, no‑pressure visit. We’ve been family‑owned and operated in St. Louis for over 28 years, committed to fair pricing, honest guidance, and energy‑smart choices that help lower utility costs. At Viviano, you’ll get real answers without the one‑call‑close—just “The Intersection of Price and Quality.”

• Showroom: Viviano Window & Door, 7530 Watson Rd, Shrewsbury, MO 63119
• Hours: Monday–Friday, 8:00 a.m.–4:00 p.m.; Closed Saturday and Sunday
• Phone: 314‑353‑8350
• Free Quote form: https://viviano-inc.com/free-quote/
• Service area: Greater St. Louis and nearby communities

Explore All Services

Helpful tip: Bring photos and rough measurements to the showroom for faster ballpark pricing and design ideas.

Get Your Bow Window Quote

Ready to open up your view with a curved bow window—without a pushy sales pitch? At Viviano Window & Door, you’ll get efficient, durable products, careful installation by trained pros, and fair, transparent pricing. It’s The Intersection of Price and Quality, delivered by a local, family‑owned team.

Call 314‑353‑8350 or Get a Free Quote to schedule a no‑obligation consultation. We respond quickly, and many appointments are available within 1–2 business days.

What to expect

• A short conversation about your goals (light, ventilation, seating, and curb appeal) so we design the right bow for your space
• Options tailored to your home and budget, including glass packages, colors, grilles, and venting
• Precise measurements and a clear, itemized written proposal—no one‑call‑close tactics, ever
• Guidance on energy‑saving choices, current specials, and financing options—call for details

Prefer to talk in person? Visit our showroom at 7530 Watson Rd, Shrewsbury, MO 63119, Monday–Friday, 8:00 a.m.–4:00 p.m. Bring photos or rough sizes if you have them—otherwise, we’ll handle everything.

More money in your windows, less in our pocket—that’s how we’ve served St. Louis for 28+ years. When you’re ready, call 314‑353‑8350 or Get a Free Quote now.