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The Best Window Replacement & Installation Company in Westchester County
At GIANT Siding and Windows, we understand the importance of window systems; from their aesthetics to their functionality. Choosing the right windows for your home is critical, windows affect everything from your home’s energy efficiency to your home’s luminance on down to insulation. We are proud to provide Westchester County homeowners our professional window installation and window replacement services.
We install quality, modern windows that effortlessly add style, comfort, and ecological cost-savings to the homes they adorn. Marvin windows offers homeowners exactly what they need – an energy-efficient window with an unmatched combination of beauty and toughness.
Why Choose Giant Siding & Windows to Handle Your Window Replacement?
We believe homeowners in and around Westchester County, NY and Fairfield County, CT deserve a top-notch window installation every step of the way. When you trust us with your window replacement, you can count on us to deliver:
- Convenient online consultations — All our sales are handled 100% virtually, so you can easily connect with us online from the comfort and privacy of your home or office.
- Experienced crews — Our in-house window team specializes in installing high-performing Marvin windows. We’re factory trained so that your windows are done right the first time—and your product warranty remains intact.
- Stress-free customer care — Every part of your project is handled expertly—from hearing your goals and confirming measurements, to performing a thorough final inspection and registering all your warranties.
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We Install Marvin Windows & Doors
Whether you’re replacing your old windows or building a new home, GIANT Siding and Windows is Westchester’s window contractors of choice. Take this as my personal invitation to reach out and ask questions about our company and products. We offer Free Quotes, Window Replacement Consultations, and honest-expert advice.
My Westchester County window installation team has the knowledge and expertise needed to plan an installation that will minimize the duration your household is in the construction phase. We will help guide you through the selection process, ensuring the windows you choose look as well as they function.
I work personally with all of my customers to make sure each is more than satisfied with their windows. Contact us today to learn more about replacing your windows or choosing the perfect window for your new home remodeling or building project.
Here at GIANT Siding and Windows, we’ve been in the business of installing new windows in Westchester County homes for decades. We know what Westchester and Fairfield County homeowners need in a window: high-quality insulation, glare minimization, and style.
Marvin windows and doors are made with High-Density Fiberglass and Ultrex® fiberglass each offer unique benefits.
Marvin Window Performance
U-FACTOR
Simply put, U-factor measures how well a window keeps heat inside your home. It’s a measure of total heat flow through a window or door from room air to outside air. Lower numbers indicate greater insulating capabilities.
SOLAR-HEAT GAIN
If U-factor denotes how much heat leaves your home, the Solar Heat Gain Coefficient (SHGC) measures how much radiant heat enters your home.
All you really need to remember is– The lower the number, the less heat a window lets in.
VISIBLE TRANSMITTANCE
The amount of visible light transferred through a window.
Low E coatings can reject solar heat gain without significant reduction to visible light passing through the glass.
As Westchester County’s Best Window Contractor, We Offer the Following Services:
- Window replacement
- Window installation
- Custom window design & sizing
- Energy-efficient window upgrades
- Historic home window replacement
- Window & door package installations
- Sliding, casement, double-hung, bay & bow window installation
Window Replacement & Installation
Our years in the window replacement and installation business have taught us it pays to use only easily recognizable high-quality window brands. With a wide variety of shapes, sizes, types, and styles to choose from, we are confident we will find the right window for your home.
GIANT Siding and Windows preferred window brand, Marvin offers homeowners a durable window, with superior finishes, high energy efficiency, available in a wide array of window treatments. Marvin windows are made with Ultrex®, a pultruded fiberglass, that Marvin has patented as it outperforms and outlasts vinyl, roll-form aluminum, and other composites.
Designed for unprecedented performance and exceptional aesthetics, Marvin’s window line offers window options for every style of home each perfectly engineered for our climate.
From Marvin’s classic double hung and single hung windows to European-style tilt turn and hopper windows to casements in industry-leading sizes, Marvin’s innovative window solutions offer virtually endless style options each in high-quality materials. This is why I am very proud to offer Westchester homeowners Marvin windows; the window brand brings so many choices to the table along with the ability to mix and match across product lines to find the right form and function for your window replacement needs.
Contact us today to talk about what kind of windows will work best for your home, personal style, and budget.
Marvin Windows are made with virtually indestructible materials and meet or exceed federal Energy Star guidelines.
WHY CHOOSE GIANT SIDING & WINDOWS AND MARVIN WINDOWS?
- Giant was the first Authorized replacement contractor in our market.
- Marvin has trained our window replacement teams on all factory-certified installation protocols.
- In 2018 we were named ARC of the year the first in our market!
- When GIANT installs your Marvin windows, our labor comes with a lifetime warranty.
Window installation
When shopping for windows, it’s important to focus on the four main categories: materials, efficiency, design, and value.
At GIANT Siding and Windows our preferred window brand, Marvin offers homeowners a durable window, with superior finishes, with industry-leading energy efficiency available in a wide array of window treatments.
The Marvin company approaches material selection differently then many other window manufacturers and holds themselves to a higher-strander. We get this, just like Marvin we are a family-owned company.
Marvin’s window and door materials—wood, extruded aluminum, High-Density Fiberglass and Ultrex® fiberglass each offer unique benefits. If you’re not sure what’s best for your project or your climate, a Marvin window and door dealer can help recommend the material with the right attributes.
Marvin’s windows and doors are inspired by how people live and that goes for homeowners right here in Westchester County, I have Marvin windows on my own White Plain’s home and they perform great through every season! My family and I love them and I think you will too!
Ultrex fiberglass is eight times stronger than vinyl and three times stronger than vinyl/wood composites. It resists fading, chalking, peeling and cracking, giving you unparalleled strength and durability.
Beautiful design
Every detail is thoughtfully considered in stunning designs with the highest levels of architectural correctness.
Innovative touches
Signature windows and doors make your life easier with considered, inventive features.
Wide range of options
The Marvin Signature Collection offers our most flexible range of product types, sizes, configurations, and design options.
ENERGY STAR qualified window + door solutions!
Marvin Windows are Energy-efficient!
Marvin windows can help reduce your utility bills and make your home more comfortable.
Not to mention the peace of mind that comes with knowing you’re helping the planet by minimizing environmental impact. Marvin offers a variety of window and door options that help you achieve long-term performance and energy cost savings, through each of our four seasons!
Frequently Asked Questions about Windows Energy Efficiency
What do I need to know about window energy efficiency?
Well, to start replacing your Westchester County home’s windows with energy-efficient ones can help reduce your utility bills, but the benefits go much further.
Choosing energy-efficient windows makes your home more comfortable, as it is your windows or doors performance that determines how much heat comes in and how much cold air escapes out through the windows; in the summer and winter months.
How do I know if a window or a door is energy efficient?
Certification programs such as those administered by the National Fenestration Rating Council (NFRC) and ENERGY STAR provide ratings designed to indicate a window or door’s efficiency.
Various performance ratings – like U-factor and Solar Heat Gain Coefficient – measure a product’s effectiveness in insulating and blocking heat from the sun, among other things.
How many panes of glass do I need for energy-efficient windows in Westchester County?
Double-pane windows are the standard for energy efficiency in Westchester and Fairfield County’s climate, using a sealed air or gas-filled gap between panes to reduce heat transfer.
Triple-pane glass offers even greater insulation and noise reduction, making it a strong option for north-facing rooms or homes near busy roads, though it comes at a higher upfront cost. Pairing either option with Low-E coatings maximizes energy performance year-round.
What Effects the Cost of Window Replacements?
Several variables influence the investment required for a window project. During your consultation, we review each of these in detail to provide clear, accurate pricing:
- Number of windows
- Window size and custom dimensions
- Window style (double-hung, casement, bay, etc.)
- Material type
- Glass upgrades (Low-E, triple-pane, impact-resistant)
- Structural modifications needed
- Condition of existing frames/walls
- Installation complexity
- Labor and accessibility
- Brand selection
- Permits or code requirements
FINANCE OFFER
SPECIAL FINANCING AVAILABLE
Special financing offers available. Apply online or inquire by phone today.
*Subject to credit approval. Contact us for details.
Our Window Replacement Projects in Westerchester County
& the Surrounding Areas
Stunning Exterior Makeover on White Plains Home with New Siding & Windows
Location: White Plains, NY
Renovations: James Hardie Siding, Marvin Windows, Metal Roofing, & Entry Doors
Beautifully Restoring A 1950s Colonial In Katonah With New Siding & Windows
Location: Katonah, NY
Renovations: James Hardie Siding; Marvin Windows
Frequent Questions About Window Replacement
Window replacement costs depend on size, style, and materials. At Giant Siding & Windows, we provide custom estimates through a free virtual consultation, helping you choose the best long-term solution for your home and budget.
Most projects take 1–3 days, depending on the number of windows. Our in-house, factory-trained team ensures a smooth, efficient installation with minimal disruption.
Common signs include drafts, difficulty opening, fogging glass, rising energy bills, or visible damage. Giant Siding & Windows can evaluate your windows and recommend the best replacement options during a virtual consultation.
Yes, energy-efficient windows can reduce heating and cooling costs by improving insulation. We install high-performance Marvin windows designed for long-term comfort and savings.
Yes. We specialize in custom window solutions that preserve your home’s character while improving performance, ideal for Westchester’s older and historic homes.
WINDOWS AND DOORS BUILT FOR HOW YOU LIVE
Marvin windows and doors are inspired by how people live.
Explore Marvin’s three product collections organized by degree of design detail, flexibility, and customization possibilities.
Check Out Our Window Articles
How to Maximize Natural Light with Marvin Window Layouts
Maximizing natural light starts with window placement, size, and orientation, not just quantity. Casement and picture windows let in more unobstructed light than double-hung units. South-facing glass captures the most daylight year-round. Marvin’s Elevate (previously Integrity Wood-Ultrex) and Essential (previously Integrity All-Ultrex) product lines offer configurations that combine high solar heat gain with clear glass options […]
Should You Replace Windows Before Siding? What Contractors Recommend
When you’re planning home upgrades—like new siding and windows—it can be tricky to know which project to tackle first, particularly if you’re being thoughtful with your budget. Windows and siding both make a big impact, but in many situations, starting with new windows is a smart move. Fresh windows not only boost comfort and energy […]
Do New Windows Really Pay Off? Understanding the ROI of Window Replacement
New windows are a smart, practical home improvement that can deliver a solid return on your investment (ROI). In fact, they offer one of the highest ROIs compared to other home exterior renovation projects. Homeowners can recoup about 60-70% of this popular upgrade’s cost when it comes time to sell. Why? Because new windows boost […]
