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Insulated Glass Unit Replacement
Insulated glass unit (IGU) replacement typically costs $198 to $480 per unit, depending on glass area and type — most standard double-pane windows stay near the $198 base. Every unit is fabricated in our own shop, cut to your exact size, and swapped in one visit.
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★★★★★ 4.9 · Rated by 473+ homeowners*
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Instant Estimate
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The same price we quote on the phone. Tell us what's going on — or just snap a photo — and see your estimate instantly.
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What is it?
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Window or door?
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Window or door?
What do you need?
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Preliminary estimate — your final price is confirmed on-site at booking. No surprises.
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Sealed Glass, Any Size
The Part, Not the Window
IGU Thickness Guide: 1/2", 5/8", 3/4" and 7/8" Units
An insulated glass unit is two panes of glass sealed around a spacer — one factory-built part that lifts out of your frame. The overall thickness (OD) is what you measure: 1/2 inch is the most common residential unit, with 5/8, 3/4 and 7/8 inch on newer and larger windows. Measure the visible glass width and height to the nearest 1/16 with a tape, note the unit thickness at an open edge, and that's everything our shop needs to build the replacement.
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1/2" overall thickness — the standard residential double-pane unit
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5/8", 3/4" and 7/8" OD — newer, larger and specialty windows
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Measure with a tape: width, height, thickness — fractions welcome
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Grids between glass, Low-E coatings and argon matched to the original
Own-Shop Fabrication
Why One Visit Instead of a 3-5 Week Glass Order
Most glass shops and franchise outfits order your sealed unit from a third-party fabricator — that's where multi-week lead times and middleman markup come from. We fabricate insulated glass units in our own shop: double-pane, tempered and laminated panels, cut to your measurements. That's why the swap starts at $198 and a scheduled repair finishes the day we arrive — old unit out, new unit sealed into the same frame.
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Own in-house fabrication — no middleman markup, no 3-5 week wait
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Double-pane and tempered glass panels built to exact size
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Your frame, sash and trim stay untouched — only the glass changes
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5-year warranty on every sealed unit, in writing
Built In-House
Diagnosed · Quoted · Warrantied
The Process
How Insulated Glass Unit Replacement Works
Measure, fabricate in our shop, one-visit swap — the frame never leaves the wall.
01/Measure Your Glass
Tape measure, fractions and the unit thickness at an open edge — or send a photo and we measure on site.
02/Written Quote by Size
Priced by your measurements and glass type — from $198, the exact number on paper before any work.
03/Fabricated in Our Shop
Your IGU is built to size in-house — spacers, Low-E, argon and grids matched to the original.
04/One-Visit Swap
Old unit out, new unit sealed in your existing frame — cleaned, tested and warrantied the same day.
Transparent Pricing
How Much Does Insulated Glass Unit Replacement Cost?
Insulated glass replacement runs $198 to $480 per unit for nearly every residential window — priced by glass area and type, never by fear of replacement:
- Standard double-pane IGU — from $198 installed
- Larger glass — priced by area and type (even a 4×5 ft picture window tops out near $480)
- Options — Low-E, argon, obscure glass and grids matched to the original
- Window seal repair — which of the two seals failed, and what each costs
- Full window replacement quoted by others — $1,000+ per opening; the IGU swap is the ~70% you keep
Quoted On-Site, In Writing
Why WowFix
Why NC Homeowners Choose WowFix
Backed by a Warranty
Every repair comes with a written workmanship warranty. If it's not right, we come back and make it right.
Repair, Not Replace
We fix the part that failed — glass, seal, sash or hardware — so you keep your windows and skip full-replacement cost.
Local, In-House Crews
Your repair is done by our own technicians, never subcontracted — most jobs booked within days.
Upfront, Honest Pricing
A clear quote before any work starts. No hidden fees, no upsells, no pressure to replace what we can repair.
See the Difference
Real WowFix Repairs: Before & After
Restored 
Rotted Sash 
New Glass 
Broken Pane 
Clear View 
Glass Out Drag the handle to compare — swipe or tap a dot for more jobs.
Local Coverage
Serving NC & Surrounding Areas
Every city crew installs the same shop-built units — find yours below.
Where We Work
Book your service today
Reviews
What NC Customers Say
Carole W.
Verified Google Review
Eugene fabricated both screens and new half double-pane windows for my home. He was professional, dedicated, and experienced. He went above and beyond to ensure the job was done right and in a timely manner. I would highly recommend WowFix for work that meets all expectations!
5
Laura P.
Verified Google Review
This is a great company. We appreciate the hard work and honesty of Eugene, who made sure our windows were fixed to our satisfaction. He completed the work on time as promised.
5
Bill D.
Verified Google Review
I had a fantastic experience with WowFix. They repaired my existing windows by cutting out rotted sashes, fashioning new ones on-site, and splicing them in. They look and work absolutely good as new!
5
Bryce K.
Verified Google Review
WowFix is a great company for repairs on doors and windows. I had two rotten double-door frames that they rebuilt. They communicate well and the pricing was fair.
5
See It For Yourself
A Real WowFix Repair — Start to Finish
No stock footage, no actors — this is one of our actual jobs. Watch a rotted, fogged-out window brought back to flawless, like-new glass.
Insulated Glass Unit Replacement — FAQ
From $198 for a standard double-pane unit, installed. Price scales with glass area and type — even a large 4×5 ft picture window lands near $480, still far below the $1,000+ full-window pitch.
Before We Arrive
How to Prepare for Your WowFix Window Repair Visit
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Photograph each problem window in daylight
Snap a clear photo of every foggy, cracked or stuck window in natural light. Morning light shows fog between the panes best and lets us quote faster — often before we arrive.
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Note what each window is doing wrong
Jot down the symptom per window — fog between the glass, won't open or stay up, draft, cracked pane, or rotted frame. It tells us whether it's a glass-only swap (from $198) or hardware/wood work.
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Clear about three feet in front of each window
Move furniture, blinds and décor back roughly three feet so our crew can measure and work safely. It keeps the visit quick and your things out of the way.
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Find any window brand or paperwork
If you have the original window brand, a sticker in the frame, or install paperwork, set it aside. It's not required, but it helps us match glass and parts on the first trip.
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Make sure we can reach the windows outside
Unlock gates, secure pets, and clear the exterior path to the windows. Most glass-unit work is done from both sides, so outside access keeps everything one visit.
Proof
Real WowFix Repairs, Up Close
The Rot Comes Out, Not the Window
We fabricate an exact-profile piece from laminated lumber and splice it in.
Shattered Pane, Same-Day Secure
New glass built to the window's exact size — frame and trim untouched.
Broken Glass on a Brick Ranch
The pane is the part that failed — so the pane is the part we replace.
Fog That Won't Wipe Off
A failed seal, not a failed window: the sealed unit is swapped, the frame stays.
Patio Door Saved from the Landfill
Rotted bottom rebuilt on-site — a fraction of the ~$10,000 a new door runs.
Real jobs, real photos — swipe for more.
Eugene Ko
Lead Window & Door Repair Specialist
This content is written by Eugene Ko, a master craftsman with 17+ years of hands-on experience in residential and commercial window repair. Eugene has personally completed over 15,000 window and door repairs across North Carolina, so every answer here is grounded in real field experience — not guesswork.
Last updated: July 1, 2026