Window Cleaning in Denver
With 300 days of sunshine, every smudge, streak, and water spot on your windows is impossible to ignore.
Denver Clean Home delivers streak-free, crystal-clear windows inside and out — so you can enjoy Colorado's sunshine and mountain views without obstruction.
Colorado Sunshine Reveals Every Imperfection
Denver averages over 300 days of sunshine per year — more than San Diego or Miami. That abundant Colorado sunshine is one of the best things about living along the Front Range. But it is also merciless when it comes to exposing dirty windows. Every fingerprint, water spot, streak, and film that might go unnoticed in a cloudy climate becomes glaringly obvious when the sun pours through your glass.
The intensity of UV radiation at Denver's 5,280-foot elevation is roughly 25 percent stronger than at sea level. This intense sunlight does more than just highlight dirt — it bakes contaminants onto the glass surface over time. Mineral deposits from hard water, tree sap, pollen, and even air pollution from I-25 and I-70 corridor traffic can bond to glass when exposed to sustained UV radiation, making them progressively harder to remove the longer they sit.
Professional window cleaning on a regular schedule prevents this buildup from becoming permanent. Our cleaning solutions and techniques dissolve and remove these contaminants before they etch into the glass, keeping your windows clear and protecting the glass itself from long-term UV damage. Clean windows also allow more natural light into your home, reducing the need for artificial lighting and showing off your interior spaces at their best.
Complete Interior and Exterior Window Cleaning
Different contaminants affect the inside and outside of your windows. Our service addresses both for a truly clean result.
Interior Window Cleaning
The inside of your windows accumulates a different kind of grime than the outside. Cooking vapors from the kitchen create a thin, greasy film on nearby windows. Candles and fireplaces deposit soot. Fingers, pet noses, and children's hands leave prints on glass at every level. Household dust settles on sills and frames.
In Denver homes with forced-air heating systems — which is nearly every home in the metro area — dry winter air circulates dust throughout the house, and windows collect more than their share. Our interior cleaning removes all of these contaminants from the glass, frames, and sills.
Interior service includes:
- ✓ Streak-free cleaning of all interior glass surfaces
- ✓ Wiping and detailing of window frames and sills
- ✓ Removal of fingerprints, pet nose prints, and smudges
- ✓ Cleaning of French doors, sliding glass doors, and patio doors
- ✓ Mirror cleaning included with interior service
Exterior Window Cleaning
The outside of your windows faces everything Colorado's climate can throw at them. Spring brings pollen, cottonwood seeds, and mud splatter from late-season snow. Summer means afternoon thunderstorms that leave mineral-laden water droplets baked onto glass by the next morning's sun. Fall brings tree sap and leaf tannins. Winter deposits road salt spray, ice melt residue, and grit from gravel-treated streets.
Sprinkler systems are another major culprit for Denver homes. Hard water from sprinkler overspray leaves white mineral deposits that worsen with every watering cycle and become extremely difficult to remove if left untreated for months.
Exterior service includes:
- ✓ Professional cleaning of all exterior glass surfaces
- ✓ Hard water and mineral deposit removal
- ✓ Removal of tree sap, bird droppings, and insect residue
- ✓ Cleaning of exterior frames and sills
- ✓ Water-fed pole systems for safe upper-story access
Hard Water Stain Removal — Denver's Biggest Window Problem
If you have ever noticed white, cloudy spots on your windows that will not come off no matter how much you spray and wipe, you are dealing with hard water mineral deposits. This is far and away the most common window complaint we hear from Denver homeowners.
Denver's municipal water supply contains calcium, magnesium, and other dissolved minerals that are perfectly safe to drink but wreak havoc on glass surfaces. When sprinkler water hits your windows and evaporates in Colorado's dry air, those minerals are left behind as a white, chalky residue. Each watering cycle adds another layer, and the intense sun bakes it onto the glass.
Standard glass cleaner cannot touch hard water stains. They require professional-grade acidic mineral dissolvers and specialized polishing techniques. Our team uses a multi-step process: first, we apply a mineral-dissolving solution and allow it to dwell. Then we use fine-grade polishing pads designed specifically for glass to physically remove the deposits without scratching. Finally, we finish with a streak-free polish.
For severe cases where mineral deposits have been building up for years, we may recommend a glass restoration treatment that uses progressively finer abrasives to bring the glass back to its original clarity. We always assess the severity before starting and provide an honest recommendation.
Preventing Future Hard Water Buildup
- 1 Adjust sprinkler heads so they do not spray directly on windows. This is the single most effective prevention method.
- 2 Schedule regular professional cleanings to remove mineral deposits before they bond permanently to the glass surface.
- 3 Consider a water softener for your outdoor irrigation system if sprinkler contact is unavoidable.
- 4 Apply protective glass coatings that repel water and minerals. We offer this as an add-on service after cleaning.
Best Times for Window Cleaning in Denver
Timing your window cleaning around Denver's seasons maximizes your results and keeps your home looking its best year-round.
Spring (April – May)
The most popular time for window cleaning in Denver, and for good reason. Winter leaves behind a season's worth of road salt spray, ice melt residue, and grime. Spring cleaning removes all of it and lets you enjoy the longer daylight hours with sparkling glass.
Pro tip: Schedule after the last spring snowstorm (typically mid-April) but before cottonwood season begins in late May to get the longest period of clean windows.
Summer (June – August)
Summer afternoon thunderstorms are a Denver staple. These brief but intense storms leave water spots and splash-up debris on lower windows. If your home has an active sprinkler system, summer is when hard water buildup accelerates the fastest.
Pro tip: A mid-summer cleaning addresses the cumulative effect of storms and sprinklers. We schedule early morning appointments during summer to avoid cleaning glass in direct sunlight, which causes streaking.
Fall (September – October)
Fall is an excellent time for window cleaning in Denver. The weather is mild, monsoon season has passed, and cleaning before winter means your windows are in top condition for the holiday season. Tree sap and leaf tannins from Denver's abundant trees are removed before winter freezing locks them onto the glass.
Pro tip: Schedule after leaves have fallen from nearby trees but before the first hard freeze, typically between late September and late October.
Winter (November – March)
Denver's winter weather is surprisingly variable. We often get weeks of mild, sunny days between storms. We perform winter window cleaning on days above 40 degrees using cold-weather formulated solutions. Interior-only cleaning is available regardless of weather conditions.
Pro tip: An interior-only cleaning during winter brightens your home during the shorter days when you are spending more time indoors. It is one of the simplest ways to improve how your home feels during the cold months.
Safe Multi-Story Window Cleaning
Many Denver homes have two or three stories, dormers, skylights, and hard-to-reach windows. We clean them all safely.
Water-Fed Pole Systems
Our primary method for upper-story windows uses purified water fed through telescoping carbon fiber poles. This allows our team to clean windows up to three stories high while standing safely on the ground. The purified water leaves zero mineral residue, drying spot-free in Denver's dry air without the need for squeegeeing.
Professional Ladder Work
For windows that require closer access — such as those with heavy hard water deposits needing hand scrubbing — our team uses professional-grade ladders with stabilizer arms and non-slip feet. All ladder work follows OSHA safety guidelines, and our crew members are trained in proper ladder placement and three-point contact techniques.
Property Protection
We protect your landscaping, exterior surfaces, and interior spaces throughout the cleaning process. Drop cloths protect floors and furniture during interior work. We avoid stepping in flower beds and are careful with ladders around siding, gutters, and roofing. We carry full liability insurance for your peace of mind.
What Screen and Track Cleaning Includes
- ✓ Screen removal and washing — each screen is carefully removed, washed with gentle soap and water, dried, and reinstalled. Damaged screens are noted for your records.
- ✓ Track vacuuming — we use a crevice tool to vacuum out dirt, dead insects, cobwebs, and debris from window tracks, both upper and lower.
- ✓ Track wiping and detail cleaning — after vacuuming, tracks are wiped clean with a damp cloth and detail brush to remove remaining residue.
- ✓ Weep hole clearing — the small drainage holes in window tracks are checked and cleared to ensure proper water drainage during Denver's rain and snowmelt.
- ✓ Hardware lubrication — upon request, we apply silicone lubricant to locks, hinges, and sliding mechanisms so your windows operate smoothly.
Screen and Track Cleaning — The Details That Matter
Clean glass is only part of the equation. Dirty screens filter dust and debris onto your freshly cleaned windows every time the wind blows. Clogged tracks prevent proper drainage and can lead to water damage to your window frames and sills.
In Denver, window screens accumulate cottonwood fibers in early summer, pollen in spring, and a general layer of fine dust year-round. Dirty screens reduce airflow, block natural light, and make even clean glass look hazy from the outside. Many homeowners do not realize how much their screens are affecting the appearance of their windows until they see the difference after a professional cleaning.
Window tracks in Denver homes are notorious for collecting debris. Our dry climate means fine dust and sand blow into tracks constantly. Dead insects accumulate during warm months. And the seasonal freeze-thaw cycle can cause moisture to pool in tracks, leading to mildew and even damage to window frames if drainage is blocked. Our track cleaning service addresses all of these issues.
What Affects Window Cleaning Pricing
We provide transparent, upfront pricing based on your specific home. Here are the factors that determine your quote.
Number of Windows
The primary factor in pricing. We count individual panes — a double-hung window with two panes counts as two. We include all accessible windows in our count during the free estimate.
Number of Stories
Second- and third-story windows require specialized equipment and additional time. Ground-floor-only homes receive the most competitive pricing.
Window Type
Standard windows, French panes, bay windows, skylights, and floor-to-ceiling glass all have different cleaning requirements. Large picture windows and specialty shapes may take additional time.
Hard Water Treatment
If your windows have significant hard water mineral deposits, the restoration process requires additional time and specialized products beyond standard cleaning.
Screen and Track Cleaning
Screen washing and track detailing add value and time to the service. We recommend including them at least once per year for optimal results.
Recurring Discount
Homeowners who schedule quarterly or semi-annual service receive a reduced per-cleaning rate. Regular customers also get priority scheduling during peak Denver seasons.
Every Denver home is different. Call (720) 352-8598 or request a free estimate online for pricing specific to your property.
Window Cleaning FAQ
Common questions about professional window cleaning from Denver homeowners.
Frequently Asked Questions
How often should I have my windows professionally cleaned in Denver?
We recommend professional window cleaning at least twice a year for most Denver homes — once in spring after winter weather passes and once in fall before the holiday season. Homes near construction zones, busy roads, or with lots of trees may benefit from quarterly cleaning. Denver's intense sunshine makes dirty windows much more noticeable than in cloudier climates, so many homeowners opt for three or four cleanings per year to keep their views crystal clear.
Do you clean both the interior and exterior of windows?
Yes, our standard window cleaning service includes both interior and exterior glass. Interior cleaning removes fingerprints, cooking film, pet nose prints, and dust buildup. Exterior cleaning removes hard water spots, mineral deposits, pollen, tree sap, bird droppings, and weather-related grime. We also clean window frames and sills as part of our service. You can request interior-only or exterior-only cleaning if you prefer.
Can you remove hard water stains from my windows?
Yes, hard water stain removal is one of our specialties. Denver and the surrounding Front Range communities have notoriously hard water, and sprinkler overspray is the leading cause of hard water deposits on residential windows. We use professional-grade mineral deposit removers and specialized scrubbing pads that dissolve calcium and lime buildup without scratching the glass. Severe buildup may require multiple treatments, but we can restore clarity to even heavily stained windows in most cases.
Do you clean window screens and tracks?
Absolutely. We offer screen cleaning and track cleaning as part of our comprehensive window service. Screens are removed, washed, dried, and reinstalled. Window tracks are vacuumed to remove debris and dead insects, then wiped clean. Clean tracks are not just cosmetic — they help your windows seal properly and operate smoothly, which matters for energy efficiency in Denver's extreme temperature range.
Is it safe to clean windows on multi-story Denver homes?
Yes. Our team is trained and equipped for multi-story window cleaning. For two-story homes, we use professional-grade extension poles with water-fed purified water systems that allow us to clean upper-story windows safely from the ground. For taller structures, we use properly secured ladders and follow strict safety protocols. We carry full liability insurance and never cut corners on safety procedures.
What is the best time of year to clean windows in Colorado?
The ideal times are mid-spring (April to May) after the last snow and before cottonwood season, and early fall (September to October) when summer storms have passed. However, we clean windows year-round in Denver. Winter cleaning is possible on mild days above 40 degrees, and we use solutions formulated for cold-weather application. The key is avoiding direct sunlight on the glass during cleaning, which causes streaking — something we always account for in our scheduling.
Related Cleaning Services
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🔄 Recurring Cleaning
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Learn MoreSee Denver in a Whole New Light
Crystal-clear windows transform the way your home looks and feels. Let Denver Clean Home bring back the sparkle with professional window cleaning inside and out.