Repair the window if the frame is sound. Replace it if the frame is not. That one test settles most of these decisions, and everything else — fogged glass, drafts, a sash that will not stay up — is usually a repair that costs a fraction of a new window.
Which is not what a replacement salesperson standing in your living room will tell you, so let's go through it properly.
What repair actually costs
| Problem | Typical fix | Cost |
|---|---|---|
| Sash won't stay up | New balances or sash cords | $75–$200 |
| Drafty around the sash | Weatherstripping + re-caulk | $20–$150 |
| Broken lock or crank | Hardware replacement | $40–$150 |
| Cracked pane, single glaze | Reglaze the sash | $100–$250 |
| Fogged double-pane | Glass-only unit replacement | $150–$400 |
| Small localized rot | Epoxy consolidant + filler | $150–$500 |
| Sticking wood sash | Plane, seal, adjust | $75–$200 |
Compare that with $400 to $900 installed for a vinyl replacement window, $700 to $1,500 for fiberglass, and $1,000 to $2,500 for wood or clad. The math is not subtle.
The four signs you actually need replacement
1. Rot in the frame, sill, or jamb. Push a screwdriver into the wood at the bottom corners of the sill — that is where water sits. If it goes in easily, you have rot, and rot is a repair only when it is small and localized. Once it has reached the jamb, you are replacing the unit.
2. Multiple failed glass units in the same house. One fogged window is a failed seal. Six fogged windows means the whole set is the same age with the same seal chemistry, and you will be paying for glass units one at a time for the next four years.
3. It no longer works. A window that will not open, will not lock, or has been painted shut since a previous administration is a safety issue as well as an annoyance. Bedrooms need an operable emergency escape opening under the residential code — the IRC calls for a minimum net clear opening of 5.7 square feet for most escape windows, with limits on how high the sill can sit. A painted-shut bedroom window is a code problem, not a quirk.
4. Single-pane glass in a climate that punishes it. If you have single-pane windows with aluminum frames in the Las Vegas Valley, no amount of weatherstripping fixes the fact that the frame itself is conducting heat straight through the wall.
Fogged glass, honestly
An insulated glass unit is two panes bonded to a spacer with a sealant and a desiccant inside. When that seal fails, moist air gets in, the desiccant saturates, and you get permanent haze between the panes that no cleaning touches.
You have three options:
- Replace the glass unit only. $150 to $400 per unit if the sash and frame are fine. This is the right answer most of the time.
- Replace the whole window. Worth it if the frame is questionable anyway or several units have failed.
- Have it "defogged." A hole is drilled, the cavity is cleaned and vented. It clears the view. It does not restore the argon fill or the original insulating value, and the unit is now vented to outside air permanently. Cosmetic fix, not a repair.
Worth checking your paperwork first — insulated glass units frequently carry manufacturer warranties in the 10 to 20 year range, and plenty of people pay for a replacement they could have had for free.
The draft that is not the window
Here is the part that costs people thousands unnecessarily.
Stand inside on a windy day with a lit incense stick and trace the perimeter. If the smoke moves at the trim, air is getting past the frame into the wall cavity, and that is a caulk and insulation problem, not a window problem. If it moves at the sash meeting rail, that is weatherstripping. If it moves through the glass area, that is a genuine glass performance issue and it is the only one of the three that new windows fix.
We have watched people buy sixteen new windows to solve air infiltration that was coming from a poorly sealed rim joist in the basement. The windows were lovely. The house was still drafty.
Where the payback math falls apart
Replacement windows are sold on energy savings, and energy savings are real but modest. Windows are a percentage of a home's total envelope loss, and replacing good-condition double-pane with slightly better double-pane changes very little.
So here is our opinion: buy replacement windows for comfort, operation, noise, and how the house looks — not for the payback spreadsheet. A room that is unusable in August because it faces west with single-pane glass becomes a room you use. That is worth $600. A projected $14 a month on your utility bill is not the reason.
The exception is genuinely bad windows. Going from single-pane aluminum to a modern low-E double-pane unit is a real jump, in comfort first and bills second.
When you should skip the contractor entirely
We install windows, and we would still rather you not call us for these.
Weatherstripping and caulk are a genuine DIY afternoon. A tube of quality exterior sealant, a utility knife, and a roll of the right weatherstrip profile. Under $40, and it fixes more perceived "bad windows" than anything else on this page.
Sash balances are a DIY job in most double-hungs. Tilt the sash in, pull the old balance, match it, put the new one in. Twenty minutes and a $30 part.
Hardware is trivial. Cranks, locks, keepers. Photograph the old one and match it.
Call someone for anything involving rot, anything above the first floor, full-frame replacement, or any window where you have found water inside the wall. Water in a wall stops being a window job and becomes a framing job, and that is not a discovery you want to make halfway through.
Getting a quote you can compare
Insist on knowing which of these you are being sold:
- Insert (pocket) replacement — the new unit fits inside the existing frame. Faster, cheaper, keeps your trim, loses a little glass area. The right call when the frame is sound.
- Full-frame replacement — everything comes out to the rough opening. More money, more disruption, and the only correct option if there is rot or the frame is failing.
A quote that does not say which one you are getting is not a quote you can compare against another one.
Henderson Elite Windows works on windows across Henderson and the Las Vegas Valley — vinyl replacements, double-hung units, and energy-efficient upgrades — and we will tell you when a $95 balance kit is the answer. For pricing, see our window cost breakdown or our guide to fogged glass between panes.
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Related services in Henderson
Henderson Elite Windows money pages — go straight to the service you need.
- Energy-Efficient & Low-E Windows →
Energy-efficient windows in Henderson are decided by solar heat gain coefficient, because in the Mojave the sun is the load and the furnace is an afterthought. Get that one number right and the back bedroom stops being unusable by four in the afternoon; get it wrong and you have paid a lot of money for a sticker that means nothing at this latitude.
- Vinyl Windows →
Vinyl windows are the sensible choice for most Henderson houses, as long as the profile is properly UV-stabilised, because desert ultraviolet is what separates a frame still looking clean in fifteen years from one that has chalked, yellowed and gone brittle. The material is fine; the quality spread inside the category is enormous, and almost none of it is visible from the sidewalk on install day.
- Double-Hung & Single-Hung Windows →
Double-hung windows are the style Henderson homeowners inherit rather than choose, and in the older Townsite and Pittman blocks they are usually painted shut, whistling, or both. A double-hung has two operating sashes in one frame and a single-hung has a fixed upper with only the bottom sliding, and that one difference drives the price, the air-leakage rating and nearly every repair we do.
- Impact-Rated & Security Windows →
Impact-rated windows in Nevada have nothing to do with hurricanes, and anyone selling them to you that way in the middle of the Mojave is reading a script written for the Gulf Coast. What laminated glass actually buys you in Henderson is forced-entry resistance, protection against wind-driven debris in monsoon season, ultraviolet rejection and a real reduction in road and aircraft noise, and on the right four or five openings that is genuinely worth the money.
- Patio & Sliding Glass Doors →
A patio slider you have to shoulder open is nearly always a roller and track problem, and in Henderson the culprit is fine blown sand that has spent a decade grinding itself into the threshold. Before anyone quotes you a new door, the rollers, the track and the panel height should be checked, because on a sound frame that is the entire repair and it costs a small fraction of a replacement.
Frequently asked questions
Is it cheaper to repair or replace a window?
Repair, almost always, in the short term. A balance or sash cord replacement runs $75 to $200, hardware is under $100, and glass-only replacement in a sound sash is $150 to $400. A full replacement window is $400 to $900 installed for vinyl. Repair wins until the frame itself is compromised.
Can a fogged double pane window be fixed?
The seal cannot be repaired, but the glass unit inside the sash can usually be replaced for $150 to $400 if the frame and sash are sound. Defogging services that drill and vent the unit clear the haze but do not restore the argon fill or the original thermal performance.
When should you replace instead of repair?
Four situations: rot in the frame or sill, multiple failed insulated glass units in the same house, sashes that no longer operate or lock properly, and single-pane glass in a climate that punishes it. Any one of those makes repair a delaying tactic rather than a fix.
How do I fix a drafty window without replacing it?
Most drafts are not the glass. Replace the weatherstripping, re-caulk the exterior perimeter with a quality sealant, check that the sash lock actually pulls the sashes tight, and look at the interior trim gap. That is often under $40 in materials and it is a genuine afternoon project.
Do replacement windows pay for themselves in energy savings?
Rarely on energy alone within a reasonable payback window. Windows are usually worth buying for comfort, noise, operation, and appearance, with lower bills as a real but secondary benefit. Anyone selling them purely on payback math is selling you a spreadsheet.
Can you replace just one window in a house?
Yes, and sometimes you should. There is no rule requiring whole-house replacement. The tradeoffs are a per-unit price higher than a bulk job and a possible visible difference if the new frame does not match the old ones.
Local context
How this applies in Henderson, NV
Every article here is written from window work done in Henderson and the Las Vegas Valley, so the numbers reflect local labour, permit and material costs rather than a national average. Your own job can land either side of them depending on access, the condition of what is already there, and the materials you pick — spectrally selective low-E coatings, argon-filled insulated glass units, warm-edge spacer systems.
The way to turn any of this into a real answer is to have someone look at your actual situation. The free estimate is free, itemized and written down, with no deposit and no obligation. Call (844) 511-2320 or start on the Henderson Elite Windows homepage.
Areas Henderson Elite Windows covers
Henderson first, then the surrounding communities of the Las Vegas Valley. Each has its own page with local detail rather than a copy of this one:
- Las Vegas, NV — the Clark County seat, founded in 1905 along the San Pedro, Los Angeles and Salt Lake Railroad, population 641,903 at the 2020 census, which makes it the largest city in Nevada
- North Las Vegas, NV — Clark County, incorporated in May 1946, population 262,527 at the 2020 census, spread across a wide, fast-growing footprint on the north end of the valley
- Boulder City, NV — Clark County, built by the federal government in the 1930s to house Hoover Dam workers, population 14,885 at the 2020 census, in one of only two Nevada municipalities that prohibit gambling
- Paradise, NV — Clark County, an unincorporated town rather than a city, population 191,238 at the 2020 census, which would rank it among the largest communities in the state if it were incorporated
- Spring Valley, NV — Clark County, an unincorporated town on the west side of the valley, population 215,597 at the 2020 census, built out mostly between the 1980s and the 2000s
- Enterprise, NV — Clark County, an unincorporated town on the southern edge of the valley, population 221,831 at the 2020 census, making it one of the fastest-growing communities in Nevada
Or jump to the full list of Henderson services.
The Henderson Elite Windows Team
Licensed window pros in Henderson, NV
Written by the Henderson Elite Windows team — licensed, insured window pros with 20+ years serving Henderson, NV and the surrounding area.