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Window
Replacement
Insert or full-frame, explained by the people who do both
Replacing windows is the one exterior project that changes how a house feels from the inside. We replace windows across Westchester, Putnam, and Fairfield County as an Andersen Premier Partner, and we start every job by telling you which kind of replacement your home actually needs.
Is It Time?
Six signs your windows are costing you more than new ones would.
Windows rarely fail all at once. They get a little draftier, a little harder to open, a little foggier, until one winter the heating bill makes the decision for you. If two or more of these sound familiar, it is worth having us look.
01
Drafts you can feel
Cold air at the sash or sill in winter means the weatherstripping or the seal between frame and wall has failed.
02
Fog between the panes
Condensation inside double glazing means the insulated glass unit has lost its seal. The glass can sometimes be replaced alone; often the window is near end of life.
03
Hard to open, or won't stay open
Broken balances, swollen wood, or paint-sealed sashes. Repairable on good frames, a replacement signal on worn ones.
04
Soft or peeling sills
Press a screwdriver into the exterior sill. If it sinks in, there is rot, and an insert window over a rotted frame is money wasted.
05
Single-pane glass
Original single-pane windows, even with storms, lose far more heat than a modern Low-E unit. These are the highest-payback replacements.
06
Rooms that never feel right
Hot in summer, cold in winter, noisy year-round. Windows are often a bigger factor than the furnace or the insulation.
Only one of these? It may be a repair, not a replacement. See what we can fix.
The Two Ways to Replace a Window
Insert vs. full-frame
An insert replacement (sometimes called a pocket or retrofit window) slides a new window into your existing frame. The old sashes and tracks come out, the frame and trim stay. It is quick, clean, and the right answer for a lot of homes built after 1980 with sound frames.
A full-frame replacement takes the whole window out, down to the studs, and installs a new unit with new flashing, insulation, and trim. It costs more and it fixes more: rot, water intrusion, air leaks behind the old frame, and the chance to change the size or style. On most pre-1980 homes in Westchester, this is what we recommend, because what we find behind the old frame usually needs attention.
Insert Replacement
Full-Frame Replacement
What stays
Existing frame, exterior trim, interior casing
Nothing. New frame, flashing, trim inside and out
Best when
Frames are square, dry, and sound
Frames are rotted, out of square, or poorly flashed
Glass area
Slightly less, because the new frame sits inside the old one
Full opening, and the opening can be resized
Change style or size
No
Yes
Disruption
Minimal. No siding or drywall work
Moderate. Exterior trim and sometimes siding are touched
Cost per opening
Lower
Higher, but it resets the clock on the whole assembly
Our recommendation
Newer homes, sound frames, budget-focused projects
Pre-1980 homes, any visible rot, additions, specialty shapes
What stays
Insert
Existing frame, exterior trim, interior casing
Full-Frame
Nothing. New frame, flashing, trim inside and out
Best when
Insert
Frames are square, dry, and sound
Full-Frame
Frames are rotted, out of square, or poorly flashed
Glass area
Insert
Slightly less, because the new frame sits inside the old one
Full-Frame
Full opening, and the opening can be resized
Change style or size
Insert
No
Full-Frame
Yes
Disruption
Insert
Minimal. No siding or drywall work
Full-Frame
Moderate. Exterior trim and sometimes siding are touched
Cost per opening
Insert
Lower
Full-Frame
Higher, but it resets the clock on the whole assembly
Our recommendation
Insert
Newer homes, sound frames, budget-focused projects
Full-Frame
Pre-1980 homes, any visible rot, additions, specialty shapes
What Drives the Price
What window replacement costs, and why
We do not publish a single number because a single number would be wrong for most homes. What we do is quote per opening, itemized, after measuring in person. These are the six things that move the total, roughly in order of how much they matter.
Andersen series
The biggest lever. The 100 and 200 Series sit in Andersen's most accessible price tier; the 400 Series is the middle tier; the A-Series and E-Series cost more and deliver more.
Insert vs full-frame
Full-frame adds demolition, flashing, and trim carpentry. It is the right spend when frames are compromised.
Size, count, and shape
Larger units, bay and bow assemblies, and specialty shapes cost more per opening. More openings lower the per-window price.
Glass and options
Triple-pane, laminated glass for sound, tempered glass near floors and tubs, grilles, hardware finishes, and exterior colors each add to the number.
Access and condition
Second-story work, tight sites, lead-safe containment on pre-1978 homes, and hidden rot discovered during removal all affect labor.
Exterior finish
Matching existing siding, new PVC or wood casing, and repainting are quoted as separate line items so you can see them.
Timeline
Measure to walkthrough
Day 1
Free in-home consultation. We measure every opening and check sills and frames for rot.
Within 2 business days
Itemized written estimate with series, style, and insert or full-frame called out per opening.
Order placed
Standard Andersen sizes typically arrive in a few weeks. Custom sizes, colors, and specialty shapes run six to eight weeks or more.
Installation
One to three days for a typical home. One opening open at a time, sealed and trimmed the same day, site cleaned nightly.
Walkthrough
We operate every window with you, confirm the seal and locks, and register your Andersen product and installation warranties.
Energy Performance
What the glass does for a Northeast winter
Westchester, Putnam, and Fairfield County sit in the ENERGY STAR Northern climate zone, where the priority is keeping heat in. Every Andersen window we specify here uses Low-E glass with argon fill as a baseline. Three terms worth knowing when you compare quotes:
- U-Factor
- How much heat escapes through the window. Lower is better. Look for 0.30 or below in our climate.
- Low-E coating
- A microscopically thin metallic layer that reflects heat back into the room in winter and keeps it out in summer, without tinting the view.
- Argon fill
- An inert gas between the panes that insulates better than air. Standard on the Andersen glass packages we install.
Common Questions
Frequently Asked Questions
Should I replace all my windows at once or a few at a time?
If most of the windows are the same age and condition, replacing them together is usually the better value: one mobilization, one lead time, consistent color and grille pattern, and a single warranty start date. If only a few have failed, we can replace those and match the rest later. Andersen's color and style consistency across years makes phasing realistic.
What is the difference between insert and full-frame replacement?
An insert replacement keeps your existing frame and trim and fits a new window inside it. A full-frame replacement removes everything down to the rough opening and installs a new window, new flashing, and new trim. Inserts are faster and less expensive. Full-frame is the right call when the frame or sill is rotted, when you want to change the window size or style, or when the old installation was never flashed properly.
How much does window replacement cost in Westchester?
The honest answer is that it depends on count, size, series, and whether the job is insert or full-frame. The series matters most: Andersen prices the 100 and 200 Series in its lowest tier, the 400 Series in the middle, and the A-Series and E-Series at the top, and a full-frame install with new exterior trim adds to any of them. We quote per opening after measuring, with the line items shown, so you can see exactly what moves the number.
How long will my home be open during installation?
One opening at a time, and never overnight. A window comes out and the new one goes in and is sealed the same day, usually within an hour or two per opening. Our crews typically complete 6 to 10 openings a day depending on size and access, so a whole home is one to three days of work.
Are Andersen replacement windows ENERGY STAR certified?
Yes. Andersen offers ENERGY STAR certified glass options across its lines, and ENERGY STAR puts the average saving from replacing single-pane windows in our Northern climate zone at around 12 percent of energy costs. For this zone that covers Westchester, Putnam, and Fairfield County we specify Low-E4 or similar glass with argon fill as standard. We can go further with triple-pane or specialty coatings on north-facing or noisy elevations.
Do replacement windows add value to my home?
Window replacement consistently ranks among the better-returning exterior projects in national cost-vs-value studies, and in Westchester and Fairfield County buyers expect windows to be in good shape. Beyond resale, you get lower bills, quieter rooms, and windows that actually open. The Andersen warranty also transfers to a new owner.
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Replace them once. Replace them right.
Andersen Premier Partner replacement windows with a 2-year installation warranty, installed by our own crews across Westchester, Putnam, and Fairfield County.
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