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Window Replacement Westchester NY

We offer comprehensive window installation and window replacement services in Westchester NY.

Quality, modern windows add style, comfort, and cost savings to the homes they adorn. My father taught me great construction starts with great products and that is why I am proud to call Marvin windows, GIANT’s window of choice.

Marvin windows offer Westchester County homeowners looking for a window replacement product, exactly what they need – an energy-efficient window with an unmatched combination of beauty and toughness.

Window Replacement Westchester NY GIANT Siding & Windows

Window Replacement Westchester NY GIANT Siding & WindowsMarvin Windows and Doors were born from The Marvin Companies’ century-long heritage of service, craftsmanship, and quality with a focus on all-out performance.

Marvin, a family-owned company just like our own, is proud to manufacture the most innovative fiberglass windows and doors on the market, backed by top-notch customer support and incomparable value.

Windows and doors inspired by how people live.

Window Replacement Beautiful Design

Beautiful design

Every detail is thoughtfully considered in stunning designs with the highest levels of architectural correctness.

Innovative Touches

Innovative touches

Signature windows and doors make your life easier with considered, inventive features.

Marvin Signature Collection

Wide range of options

The Marvin Signature Collection offers our most flexible range of product types, sizes, configurations, and design options.

Window Replacement Westchester: Custom Solutions


Window Replacement Westchester NY Custom SolutionsGIANT is proud to bring Westchester NY County homeowners to access to Marvin’s full window line which includes replacement windows solutions!

Whether you’re unsure if you need to replace your current windows or are wondering what your best next steps are, the GIANT team is here to help. Feel free to contact us at any time.

Marvin offers a nice,  five-step approach, complete with helpful tools that make the window replacement process clear, organized and streamlined. Our team will be with you every step of the way!

ENERGY STAR Qualified Window + Door Solutions!

Energy Star Logo

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.

Are tax credits still available for energy-saving window and door replacements here in Westchester NY County?

Tax credit programs change often. To stay up-to-date with the latest, visit

Marvin Window Performance


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.


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.


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.

WINDOWS AND DOORS BUILT FOR HOW YOU LIVE |Window Replacement Westchester

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.

MARVIN SIGNATURE™ COLLECTION - Window Replacement Westchester

Previously known as Marvin Windows and Doors

The Marvin Signature™ collection offers Marvin’s broadest range of product types, sizes, configurations and design options. You’ll experience the difference in every thoughtful detail, with the highest level of architectural precision and beautiful aesthetics.

MARVIN ELEVATE™ COLLECTION - Window Replacement Westchester


Previously known as Integrity Wood-Ultrex®

The Marvin Elevate™ collection is an ideal blend of design and strength, balanceing your style and performance needs. Patented fiberglass exteriors stand up to all elements, outperforming and outlasting vinyl, roll-form aluminum and other fiberglass composites.

MARVIN ESSENTIAL™ COLLECTION - Window Replacement Westchester

Previously known as Integrity All Ultrex®

The Marvin Essential™ collection brings together design, quality, and performance in one streamlined offering. Strong, durable fiberglass exteriors and interiors are both striking and virtually maintenance-free.