Window Repair Denver: foggy seals, drafts, frame rot & hardware failures
Precision Exteriors Restoration is a licensed Colorado contractor fixing Denver windows since 2016. We repair failed seals, broken glass, frame rot, drafty windows, and worn hardware, with a free inspection and a straight repair-versus-replace answer.
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Tell us what is going on with your windows and we will take a look, usually within the same week.
Window repair in Denver, answered up front
Direct answer: Most Denver window repairs cost $100 to $600 per window and are completed the same day or within one day. Precision Exteriors Restoration, a licensed Colorado contractor (License #0248041) since 2016, fixes foggy or failed seals, broken glass, damaged frames and sashes, and drafty windows, and helps document storm damage for insurance. Free inspections are usually within the same week.
Precision Exteriors Restoration is a licensed exterior contractor in Denver, Colorado (Colorado License #0248041) providing residential window repair across the Denver Metro and Front Range, insulated glass unit seal repair, frame rot repair, weatherstripping replacement, hardware repair, and flashing corrections. Founded in 2016, we bring 20+ years of combined experience and 3,000+ completed Front Range exterior projects to every window assessment.
Our approach to window repair starts with a single question: does the frame justify preserving it? When the answer is yes, and it often is, targeted repair restores performance at a fraction of replacement cost. We do not recommend replacement when repair is the right path. We also do not recommend repair when the frame has failed past the point where repair holds value. A free inspection gives us the information to make that call accurately.
We are an Owens Corning Preferred Contractor and CertainTeed Master Installer. BBB A+ Accredited. NRCA member. All window repair work is backed by our 10-year workmanship warranty. Free inspections, no obligation.
Window repair vs. window replacement in Denver
Direct answer: Repair is the right call for a foggy or failed seal, broken glass, or minor frame and sash damage, at roughly $100 to $600 per window and same-day turnaround. Replacement makes sense for single-pane or aging windows, widespread damage, or drafts and high energy bills, at $450 to $1,200 per window installed.
| Window repair | Window replacement | |
|---|---|---|
| Best when | Foggy or failed seal, broken glass, minor frame or sash damage | Single-pane or aging windows, widespread damage, drafts and high energy bills |
| Typical Denver cost | $100 to $600 per window | $450 to $1,200 per window installed |
| Added lifespan | A few years | 20 to 30 years |
| Timeline | Same day to 1 day | 1 to 2 days |
| Energy impact | Minimal | Lower bills with double-pane low-E glass |
Not sure which path fits your home? Compare both routes in our Denver window replacement guide, or call (720) 408-1840 and we will help you decide.
What window repair covers
Window repair addresses specific, contained failures within an otherwise sound window system. The most common repair categories on Denver Metro homes are the following.
Insulated glass unit (seal failure)
Foggy double-pane glass from a failed edge seal, the most common Front Range window failure, replaced with an altitude-specified unit.
Frame repair: wood rot & damage
Sill, corner, and frame rot on older Denver homes, restored with epoxy consolidant where the frame is structurally sound.
Weatherstripping replacement
The most cost-effective fix for drafty windows in Denver's low-humidity, high-UV climate.
Hardware repair
Casement operators, spiral balances, locks, and cranks restored, often in a single visit.
Caulking, flashing & exterior seal
Frame-to-casing and head flashing repairs that stop moisture before it reaches the wall cavity.
Storm & hail damage
Cracked frames and impact damage documented for your insurance claim. See our hail damage guidance.
Insulated Glass Unit Replacement (Seal Failure)
The insulated glass unit, the sealed assembly of two panes with argon gas between them, is the thermal core of every modern double pane window. When the edge seal fails, outside air infiltrates the sealed space, moisture condenses between the panes, and the window fogs from the inside in a way that does not wipe off. This is the single most common window failure on Front Range homes, and it is entirely repairable when the frame is structurally sound.
IGU-only replacement involves removing the failed glass unit from the existing frame and installing a new, correctly specified unit in its place. The frame stays. The rough opening is undisturbed. No siding disturbance, no interior trim removal in most cases. When the frame is plumb, square, and free of rot or moisture damage, this is a significantly less expensive path than full window replacement, and it restores full thermal performance.
For Denver and Front Range homes, the replacement IGU must be specified for altitude. Units manufactured at lower elevations carry internal gas pressure calibrated for sea-level conditions, which stresses seals at 5,280 feet. We specify altitude-appropriate IGU units on every seal replacement.
Frame Repair: Wood Rot and Physical Damage
Wood window frames on older Denver Metro homes, particularly homes built before 1990, are susceptible to rot at the sill, at frame corners, and at any point where the caulk-to-frame seal has failed and allowed moisture intrusion. Surface rot that has not penetrated into structural frame material can often be repaired with epoxy consolidant and filler, restored to dimensional shape, primed, and painted. The result is a structurally sound frame at a fraction of replacement cost.
Rot that has penetrated the full sill thickness, compromised the corner joinery, or spread to the rough opening framing requires a more involved assessment. In those cases, we distinguish between what can be repaired and what requires replacement, and we provide that assessment directly rather than defaulting to a replacement recommendation.
Physical damage to vinyl frames from minor impact, surface cracking, corner separation from thermal cycling, can sometimes be addressed with frame stabilization, but vinyl frame repair has limits. Vinyl that has lost dimensional stability, that has stress-cracked through to the interior, or that has separated significantly at corners is generally a replacement candidate rather than a repair candidate. We assess which applies during inspection.
Weatherstripping Replacement
Weatherstripping is the compressible seal material that runs around the window sash and creates an air-tight closure against the frame when the window is shut. In Colorado's low-humidity climate, weatherstripping dries and hardens faster than in humid markets, losing its ability to compress and seal within 5 to 10 years on windows exposed to high UV. A window with failed weatherstripping admits cold air around the entire sash perimeter regardless of how well the glass unit performs.
Weatherstripping replacement is one of the most cost-effective repairs in the Denver window market. It is a common source of drafts that are misdiagnosed as glass unit failure, and it is frequently overlooked in general contractor assessments that focus on the glass rather than the frame seal. We test weatherstripping compression on every inspection, a simple dollar-bill test (close the window on a dollar bill; if it slides out without resistance, the seal has failed) identifies the failure before any disassembly.
Hardware Repair: Operators, Balances, Locks, and Cranks
Window hardware failures are mechanical problems with mechanical solutions. Casement window operators, the crank mechanisms that extend the sash outward, wear out, strip their drive gears, and detach from the sash track after years of use. Spiral balances in double-hung windows lose tension and allow the sash to drop rather than hold position. Sash locks wear and no longer draw the sash tightly against the frame seal. All of these are hardware repairs that restore window function without touching the frame or glass.
Hardware replacement requires matching the correct component specification to the existing window model and frame configuration. We identify the correct replacement hardware during inspection and complete the repair in a single visit in most cases.
Caulking, Flashing, and Exterior Seal Repair
The caulk joint between the window frame and exterior casing, and the flashing integration between the window and the wall assembly, are the primary moisture management components around every window opening. Failed caulk at the frame-to-casing joint admits water against the frame exterior and eventually against the rough opening framing. Deteriorated or missing flashing at the window head allows water to run behind the casing and into the wall cavity.
These are exterior seal repairs that can be completed without disturbing the window unit itself. They are also failures that, if left unaddressed, accelerate frame rot and wall assembly moisture damage, making them high-priority maintenance repairs when identified. We address exterior window seal failures during combined siding and window assessments and as standalone repair work.
Diagnosing the problem: repair or replace?
The repair-vs.-replacement question is the most important judgment call in window service, and it depends on a structured assessment of frame condition against the cost of repair relative to the cost and value of replacement. Here is how we think through it.
Repair is clearly right when
- The frame is structurally sound, no rot penetrating into load-bearing frame material, no significant warping, corners tight.
- The failure is contained, a single failed IGU seal, hardware failure, or weatherstripping degradation.
- The window is less than 15 to 20 years old and the frame has significant remaining service life.
- The window is in a location where replacing it alone would create a visible mismatch with adjacent windows of the same vintage.
Replacement is clearly right when
- The frame has rotted to the point where structural integrity is compromised.
- The frame has lost dimensional stability, warped, twisted, or no longer square in the opening.
- Multiple failure modes are present simultaneously on the same window: failed seal, failed weatherstripping, and hardware failure in a frame already showing rot.
- The window is 25 or more years old with early-generation single or double pane glass, and the frame and glass together have reached end-of-service-life.
- The homeowner wants to upgrade to ENERGY STAR compliant products under HB 23-1161.
The gray zone, where inspection matters most
- A frame showing early surface rot at the sill with an otherwise sound IGU and tight hardware sits in the gray zone.
- The right call depends on how far the rot has penetrated, whether the flashing condition will allow the rot to recur after repair, and what the total repair cost is relative to the pro-rated replacement value.
- We document this clearly during inspection and give you a straight answer with numbers, not a default recommendation toward either repair or replacement.
Colorado-specific repair considerations
Direct answer: Colorado's climate creates specific repair conditions that matter on Front Range homes: heavy thermal cycling, UV-driven weatherstripping breakdown, altitude-sensitive glass units, and hail damage that can crack frames without breaking glass.
Thermal cycling fatigue
Colorado's temperature range, sub-zero winter lows to surface temperatures exceeding 130°F on south and west exposures in summer, creates more thermal expansion and contraction cycling per year than most markets. Vinyl frame corners that have separated slightly from this cycling are a common finding on 15- to 20-year-old Denver Metro windows. When the corner separation is minor and the frame is otherwise sound, a corner stabilization repair can restore the frame seal. When separation is significant, the frame has lost structural integrity.
UV-driven weatherstripping degradation
Colorado's 300 days of sunshine at altitude accelerates weatherstripping hardening compared to humid or overcast markets. Weatherstripping that might last 10 to 15 years in the Southeast lasts 5 to 8 years on south and west-facing Denver windows. On older Denver homes, checking weatherstripping condition every 5 years is prudent maintenance that prevents the larger repair costs of moisture infiltration that follows failed weatherstripping.
Altitude and IGU replacement
As noted in the IGU section above, replacement glass units for Denver Metro homes must be specified for altitude. This is a repair-specific consideration, a correctly specified replacement unit installed in a sound frame at altitude will outlast a sea-level-specified unit by years, because the pressure differential that stresses seals prematurely is addressed from day one of the repair.
Hail damage and repair scope
Hail events that crack window frames without breaking glass create a specific repair-vs.-replace question. A cracked vinyl frame corner from a hail impact can sometimes be stabilized, but the structural integrity of the crack needs direct assessment. We document all hail-related frame damage during post-storm inspections and provide clear guidance on whether repair holds or replacement is warranted, and that documentation supports the insurance claim regardless of which path is taken.
Why Denver windows fail faster than most markets
High-altitude sun, big temperature swings, and Hail Alley storms put Front Range windows under more stress than almost anywhere in the country.
What we look for during a window repair inspection
Direct answer: A thorough window repair inspection is not a visual check from outside the home. It is a close-contact assessment of every functional component in the window system. Here is what we examine.
Every functional component, assessed
- Glass unit condition We check for fogging, condensation patterns, and any visible distortion in the pane surface that indicates gas fill loss or internal pressure failure. A fogged unit that clears in warm weather and returns in cold confirms active seal failure, versus surface condensation from interior humidity that clears as conditions change.
- Frame integrity We probe sills and corners for soft spots that indicate subsurface rot beyond what is visible. We check frame corners for separation, vinyl for stress cracking through the frame thickness, and aluminum cladding for denting or separation from the frame substrate. We assess whether the frame is still plumb and square in the opening, a frame that has racked cannot be sealed correctly regardless of how well the weatherstripping is replaced.
- Weatherstripping compression We test every sash closure point for weatherstripping compression seal. We check for hardening, cracking, and gaps in the weatherstripping run, particularly at corners where compression is highest and material tends to fail first.
- Hardware operation We operate every operable sash through its full range, checking casement operators for smooth engagement, double-hung sashes for balance and lock engagement, sliding windows for track condition and latch function. Hardware that binds, skips, or requires force to operate is documented for repair or replacement.
- Exterior caulk and flashing We inspect the caulk joint at every point where the window frame meets exterior casing, head, jambs, and sill. We check visible flashing at the window head for correct lapping and for any separation from the wall assembly. Failed caulk and flashing are among the most consequential findings because they drive moisture into the wall cavity over time, creating damage well beyond the window itself.
- A straight repair-versus-replace answer We document each finding and give you the numbers, then recommend the path that protects your home and your budget, repair when repair holds, replacement when it does not.
Bumper-to-Bumper Coverage
The Precision Warranty: a 10-year workmanship guarantee
Every qualifying installation is backed by the Precision Warranty, a 10-year workmanship warranty. Combined with the enhanced manufacturer warranty our Owens Corning Preferred and CertainTeed Master certifications unlock, you get bumper-to-bumper protection on labor and materials.
10-Year Workmanship Warranty
Our installation quality is covered for a full decade, in writing.
Certified-Installer Manufacturer Warranty
Owens Corning Preferred and CertainTeed Master certifications enhance your material warranty.
Bumper-to-Bumper Peace of Mind
Labor and materials covered end to end, you chose the right company.
Serving Denver and the Front Range
Direct answer: Precision Exteriors Restoration provides window repair across the Denver Metro and Front Range: locally based and locally responsive, with crews working from our downtown Denver office at 999 18th St Unit 3000.
Window repair FAQs
Can fogged windows be repaired without full replacement?
How do I know if my draft is from the glass unit or the weatherstripping?
Is it worth repairing old windows or should I just replace them?
Does window repair work fix drafts?
How long does window repair take?
What is the cost of window repair in Denver?
Schedule a free window inspection
Tell us what is going on with your windows and we will take a look, no obligation. We diagnose the real source of the problem and give you a straight repair-versus-replace answer with numbers.
