VELUX skylights last 20 years or more with proper installation and routine maintenance. Many VELUX units remain fully functional for 30 years before homeowners begin to consider replacement, according to VELUX’s own replacement guide. The longevity of a VELUX skylight depends on installation quality, the type of skylight (fixed or vented), the roofing environment, and how well the homeowner maintains the flashing, seals, and glass over time. VELUX backs this lifespan with a 20-year warranty on glass, a 10-year warranty on the product, a 10-year No Leak installation warranty, and a 5-year warranty on blinds and controls.
This guide covers how long VELUX skylights last compared to other skylight types, what factors shorten or extend that lifespan, what the VELUX warranty covers, how to tell when a skylight needs replacing, what replacement costs, and how skylights affect home value and energy efficiency.
How Long Do VELUX Skylights Last and What Determines Their Lifespan
VELUX skylights last 20 to 30 years or more depending on the quality of the initial installation, the climate, and the consistency of maintenance. VELUX states on its official blog that many of its skylights can last 20 years or more with typical wear and tear from being on the roof, and its replacement cost guide notes that VELUX skylights are protected under warranty for up to 20 years and often last 30 years or longer before homeowners start to consider replacement. Low-end, self-flashing plastic skylights from other manufacturers typically last only 10 to 15 years, according to Exterior Contractor, a roofing firm that specializes in skylight installation.
The difference in lifespan between a VELUX skylight and a budget plastic unit comes down to materials, engineering, and the flashing system. VELUX skylights use tempered or laminated glass rather than plastic domes, which resists yellowing, hazing, and UV degradation far longer than polycarbonate or acrylic alternatives. The frame construction uses wood, aluminum cladding, or a combination of both, which maintains structural integrity across decades of temperature cycling. The VELUX flashing system uses separate sill flashing, step flashing, and saddle flashing pieces that layer with the roofing material to create a watertight barrier. Budget skylights that rely on self-flashing (built into the unit itself) do not perform as well over time because the single-piece design has fewer redundant layers of water protection.
What Factors Affect How Long a Skylight Lasts
Four primary factors determine how long any skylight lasts: installation quality, climate exposure, maintenance, and the skylight’s construction materials. Each factor contributes independently to the overall lifespan, and weakness in any one area can shorten the functional life of even a premium skylight.
Installation quality is the single most important factor. Exterior Contractor notes that many skylight leaks occur because the installer made a mistake during the initial installation, and those mistakes can take years to become visible. A misplaced nail, improperly layered shingles, or skipped ice-and-water shield underlayment around the skylight opening can all lead to slow leaks that damage the framing and interior ceiling long before the homeowner notices. VELUX addresses this risk with its 10-year No Leak installation warranty, which covers proper skylight and flashing installations against leaks regardless of who installed the skylight. Hiring a VELUX-trained installer further reduces installation risk because these professionals understand the specific layering sequence required for VELUX’s three-layer water protection system.
Climate exposure affects skylight longevity through UV radiation, temperature cycling, snow load, hail, and wind-driven rain. Skylights on south-facing roof planes receive more UV exposure and greater thermal stress than those on north-facing slopes. Homes in regions with heavy snowfall face additional load pressure on the glass and flashing. Central Oregon winters bring snow accumulation on rooftops, and summers deliver intense UV at elevation, both of which stress skylight components.
Selecting a Low-E glass skylight with proper flashing and underlayment is essential for reaching the full 20-to-30-year lifespan in any climate with significant temperature swings and precipitation.
What Does the VELUX Skylight Warranty Cover
The VELUX skylight warranty covers the glass, product components, installation against leaks, and blinds and controls, each with a different coverage period. VELUX calls this the 20/10/5-year limited product warranty, and it is one of the strongest warranty programs in the skylight industry.
| Coverage Area | Duration | What It Covers |
|---|---|---|
| Glass (IGU) | 20 years | Seal failure, fogging between panes, material obstruction of vision through the insulated glass unit |
| No Leak Installation | 10 years | Leaks caused by proper skylight and VELUX flashing installation, regardless of who installed it |
| Product Components | 10 years | Defects in materials or workmanship of the frame, sash, hardware, and operating mechanism |
| Blinds and Controls | 5 years | Defects in solar-powered blinds, electric motors, rain sensors, and remote controls |
| Hail Damage (select models) | Up to 10 years | Glass breakage from hail on eligible skylight models |
Sources: VELUX USA warranty documentation, VELUX No Leak Promise, VELUX Solutions warranty resources. Coverage applies to products purchased from an authorized VELUX dealer and installed in the United States. Warranty begins from the date of purchase.
The 10-year No Leak installation warranty is an industry first. VELUX is the only skylight manufacturer that guarantees against installation leaks for a full decade, covering both product and labor, no matter who performs the installation. The warranty requires that the skylight be installed with VELUX-branded flashing. Skylights installed without VELUX flashing are not eligible for the No Leak Promise. This is why we always recommend specifying VELUX flashing alongside the skylight unit when ordering products for a project.
How Do You Know If Your Skylight Needs Replacing
You know your skylight needs replacing when you observe persistent signs of seal failure, water intrusion, mechanical failure, or visible deterioration that maintenance alone cannot resolve. The most common signs include:
- Fogging or condensation between the glass panes, which indicates the insulated glass unit seal has failed and moisture has entered the sealed airspace. Once the seal breaks, the fogging cannot be cleaned and the glass unit must be replaced.
- Water stains, peeling paint, or warped trim on the ceiling or walls around the skylight, which indicate an active or recurring leak. As noted by This Old House, seal failures lead to visible damage including staining, peeling paint, and warped trim.
- Yellowing, hazing, or crazing of the glazing surface, which is most common in older plastic-dome skylights and indicates UV degradation of the glazing material. Glass skylights like VELUX units resist this type of degradation.
- Difficulty opening or closing a vented skylight, which indicates mechanical wear in the operator, hinge, or motor assembly.
- Visible cracks in the glass from impact, thermal stress, or settling.
- The skylight is being replaced as part of a full roof replacement, which is the most cost-effective time to install new skylights because the roofing crew is already working on the roof and the labor is shared.
VELUX recommends having skylights inspected at least once every few years as part of routine energy-efficient windows and building envelope maintenance. An inspection should include checking the flashing for lifted edges or gaps, examining the glass for fogging or cracks, clearing debris like leaves and twigs from around the skylight frame, and verifying that the weep system (which drains condensation away from the glass) is functioning properly.
Where Do Most Skylights Usually Leak
Most skylights leak at the junction between the flashing and the roofing material, not through the glass itself. The flashing is the metal or composite material that wraps around the base of the skylight where it meets the roof surface. When the flashing is improperly layered with the shingles, when nails penetrate the waterproof membrane, or when caulk deteriorates over time, water finds a path beneath the roofing and enters the building through the skylight opening.
VELUX engineered its three-layer water protection system specifically to prevent flashing leaks. The three layers are a deck seal or gasket that creates a tight bond between the skylight and the roof deck, an adhesive underlayment that provides secondary protection against harsh weather, and a precision-fit flashing kit that integrates with the surrounding roofing material as the first line of defense against water and rain. This three-layer approach is why VELUX can offer the 10-year No Leak installation warranty. Budget skylights that use a simpler flashing method have fewer protective layers and are more vulnerable to leaks as the roof ages and settles.
How to Maintain VELUX Skylights to Maximize Their Lifespan
Maintaining VELUX skylights requires a small amount of effort that pays large dividends in extended lifespan and continued performance. The maintenance tasks are straightforward and can be performed by the homeowner in most cases.
- Clear debris from around the skylight frame at least twice a year, especially after fall leaf drop and spring storms. Leaves, twigs, and pine needles that accumulate around the skylight trap moisture and prevent proper water drainage.
- Inspect the flashing visually from the roof or with binoculars from the ground. Look for lifted edges, gaps between the flashing and the roofing material, or rust spots on metal flashing components.
- Clean the exterior glass surface once or twice a year using a soft cloth and a non-abrasive glass cleaner. Do not use power washers, harsh chemicals, or abrasive cleaners, as these can damage the Low-E coating and void the warranty.
- Test the weep system by pouring a small amount of water on the exterior glass and verifying that it drains away from the frame without pooling. A blocked weep channel can cause water to back up into the frame.
- Lubricate the operator mechanism on vented skylights annually with a silicone-based lubricant. This keeps the crank, hinge, or motor operating smoothly and prevents binding that accelerates mechanical wear.
- Check the interior ceiling around the skylight for any signs of water staining, peeling paint, or mold, which may indicate a slow leak that is not yet visible from the exterior.
Do Skylights Need to Be Resealed
Skylights need to be resealed when the original sealant around the flashing or frame deteriorates to the point where water can penetrate the barrier. Resealing is a maintenance task, not a design flaw. All exterior sealants break down over time due to UV exposure, temperature cycling, and physical weathering. The lifespan of skylight sealant depends on the product used and the climate, but most high-quality sealants last 10 to 15 years before they begin to crack, shrink, or pull away from the surfaces they bond.
Resealing a skylight typically costs $75 to $250, according to HomeGuide’s 2026 repair cost data. The work involves removing the old sealant, cleaning the surfaces, and applying a new bead of roofing-grade silicone or polyurethane sealant around the flashing-to-roof and flashing-to-frame junctions. This is a routine repair that extends the functional life of both the flashing and the skylight. When the skylight itself is still in good condition but the sealant has failed, resealing is far more cost-effective than full replacement. Homeowners who maintain quality windows and skylights on a regular schedule catch sealant degradation early, before it causes interior water damage.
How Long Do Fixed Skylights Last Compared to Vented Skylights
Fixed skylights generally last longer than vented skylights because they have no moving parts. A fixed VELUX skylight is a sealed glass unit with no operator, hinge, motor, or gasket around a movable sash. The only components that can fail are the insulated glass unit seal, the flashing, and the exterior sealant. With proper installation and maintenance, a fixed VELUX skylight can reach the upper end of the 20-to-30-year range with minimal intervention.
Vented skylights (VELUX calls them “Fresh Air” skylights) have the same glass and flashing durability as fixed units, but they include additional mechanical components that wear over time. The operator mechanism, gaskets around the movable sash, rain sensors, and electric or solar motors all have shorter service lives than the glass and frame. VELUX covers blinds and controls for 5 years, which reflects the reality that these components cycle through their useful life faster than the structural elements of the skylight. Replacing a motor costs $110 to $510, and replacing blinds costs $100 to $500 for materials, according to VELUX’s published cost data. These component replacements extend the functional life of a vented skylight without requiring full unit replacement.
How Much Does It Cost to Replace a VELUX Skylight
Replacing a VELUX skylight costs $800 to $2,400 on average when the existing opening and framing are in good condition, according to HomeGuide’s 2026 skylight replacement data. A new VELUX skylight installation (where no skylight previously existed) costs significantly more because it requires cutting into the roof, framing the opening, building a light shaft, and finishing the interior ceiling. New VELUX skylight installations range from $3,000 to $7,300 in 2026, according to Bill Ragan Roofing’s 2026 cost guide, depending on the type selected.
| VELUX Skylight Type | New Installation (2026) | Replacement (2026) |
|---|---|---|
| Fixed Skylight | $3,000 – $5,000 | $800 – $1,800 |
| Manual Fresh Air (Vented) | $3,200 – $5,900 | $1,000 – $2,100 |
| Electric Fresh Air (Vented) | $4,350 – $7,250 | $1,500 – $2,400 |
| Solar-Powered Fresh Air (Vented) | $4,250 – $7,150 | $1,400 – $2,400 |
| Sun Tunnel (Tubular) | $500 – $1,500 | $300 – $800 |
Sources: Bill Ragan Roofing 2026 skylight cost guide, VELUX USA project calculator estimates, HomeGuide 2026, Well Built Florida. All figures include materials and estimated labor for a standard residential installation. Actual costs vary by roof complexity, pitch, and local labor rates.
The most cost-effective time to replace skylights is during a roof replacement, because the roofing crew is already on the roof and the labor for removing and reinstalling roofing material around the skylight is shared with the broader roof project. Homeowners who plan to replace their roof within the next few years should consider replacing aging skylights at the same time rather than doing the work separately.
Coordinating skylight replacement with a broader window replacement project and roof work maximizes labor efficiency and minimizes total disruption. Starting in 2026, VELUX includes solar-powered blinds with all new skylights, which is one reason installation prices have increased slightly compared to previous years.
Do Skylights Decrease Home Value
Skylights do not decrease home value when they are properly installed, well-maintained, and leak-free. A functioning skylight adds natural light, ventilation, and architectural interest to a home, all of which are features that buyers value. A 2026 Redfin and Ipsos survey found that 44 percent of U.S. residents prioritize natural light over home size when choosing a home, and residents in “sun-filled” homes reported a 77 percent satisfaction rate, 30 percentage points higher than those in dimmer properties. Skylights directly address this buyer preference by bringing daylight into rooms that skylights bring natural light to spaces that standard windows cannot reach.
Skylights can decrease perceived home value when they show visible signs of leaking, fogging, or deterioration. A stained ceiling, warped trim, or a yellowed plastic dome signals deferred maintenance to a buyer and raises concerns about water damage hidden in the roof structure. This is why maintaining skylights throughout their lifespan matters for both the homeowner’s comfort and the home’s resale position, just as maintaining entry doors and windows protects the building envelope and curb appeal simultaneously.
According to the U.S. Department of Energy, windows and skylights account for 25 to 30 percent of residential heating and cooling energy use, so a well-glazed VELUX skylight with Low-E glass also contributes to measurable energy savings that offset the cost of the unit over its lifespan.
What Is a Better Alternative to Skylights
The better alternative to a traditional skylight depends on the goal. If the goal is to bring natural light into a small interior space like a hallway, closet, or bathroom where a full skylight would be oversized or too expensive, a VELUX Sun Tunnel skylight is the most practical alternative. Sun Tunnels are tubular skylights that channel sunlight from a small dome on the roof through a reflective tube down to a ceiling-mounted diffuser. Sun Tunnel installation costs $500 to $1,500, which is a fraction of a full skylight installation, and the smaller roof penetration reduces the risk of leaks.
If the goal is to bring large amounts of natural light into a main living space without roof penetrations, glass wall systems, floor-to-ceiling windows, or clerestory windows on high walls can achieve similar effects. These options work best in new construction or major remodels where wall openings are part of the design.
For existing homes where adding wall windows is impractical, a skylight remains the most effective option for delivering daylight from above. Combining skylights with quality windows on exterior walls creates a layered natural lighting strategy that reduces dependence on artificial light throughout the day.
Can VELUX Skylights Qualify for Tax Credits
VELUX skylights can qualify for the federal Energy Efficient Home Improvement Tax Credit when they meet ENERGY STAR Most Efficient criteria. The tax credit provides up to $600 total for ENERGY STAR Most Efficient windows and skylights installed through December 31, 2032, covering 30 percent of the product cost. To qualify, the skylight must meet the ENERGY STAR Most Efficient U-factor and SHGC requirements for the applicable climate zone, and the manufacturer must provide a qualifying certification statement.
VELUX’s advanced LoE3 glass provides strong energy efficiency with higher visible light transmittance and improved solar heat performance, which positions many VELUX models to meet or approach the ENERGY STAR thresholds. The EPA’s ENERGY STAR program reports that certified windows and skylights can reduce heating and cooling costs by up to 13 percent nationwide. Homeowners exploring window tax credits for their projects should verify the specific VELUX model’s ENERGY STAR certification status with their dealer before purchasing.
Frequently Asked Questions
What Is the Best Brand of Skylights
The best brand of skylights is VELUX. VELUX is the world’s largest skylight manufacturer, has been in business for over 75 years, offers the industry’s only 10-year No Leak installation warranty, and provides a 20/10/5-year limited product warranty that exceeds what most competitors offer. VELUX skylights use glass rather than plastic, include patented three-layer water protection, and are available in fixed, manual vented, electric vented, and solar-powered configurations. We carry VELUX skylights and can help match the right model and size to your project.
How Often Should Skylights Be Inspected
Skylights should be inspected at least once every two to three years, and after any major storm that could have damaged the roofing or flashing. The inspection should include checking the flashing for gaps or lifted edges, examining the glass for fogging or cracks, clearing debris from around the frame, and looking for water stains on the interior ceiling. Homeowners in areas with heavy snowfall or frequent hail should inspect more frequently.
Should You Replace Skylights When You Replace the Roof
Yes, you should replace skylights when you replace the roof if the skylights are more than 15 years old or showing signs of seal failure. Replacing skylights during a roof project is significantly less expensive than doing the work separately because the roofing crew is already accessing the roof, removing shingles, and installing underlayment. A skylight that is left in place during a reroof may leak within a few years as the new roofing material settles differently around the aging skylight flashing.
Do VELUX Skylights Come With Blinds
Starting in 2026, VELUX includes solar-powered blinds with all new skylights. These blinds are operated by remote control and can be integrated with smart home systems for automated operation. Solar-powered blinds use a built-in solar panel to charge the motor, which means no wiring is required. The blinds allow homeowners to control light levels, reduce glare, and improve thermal insulation during extreme temperatures.
Can You Repair a Skylight Instead of Replacing It
You can repair a skylight instead of replacing it when the issue is limited to a specific component. Leaking skylight repair costs $225 to $800, glass replacement costs $150 to $600, motor replacement costs $110 to $510, and resealing costs $75 to $250, according to HomeGuide’s 2026 data. When multiple components have failed or the skylight is more than 20 years old, full replacement is usually the more reliable and cost-effective option because it restores the full warranty and eliminates the risk of cascading component failures.
How Long Do Sun Tunnel Skylights Last
VELUX Sun Tunnel skylights last 20 years or more, similar to full-sized VELUX skylights. Sun Tunnels have fewer components than vented skylights (no moving parts, no motor, no operator), which reduces the number of potential failure points. The primary maintenance requirement is keeping the roof dome clear of debris and inspecting the flashing seal periodically. Sun Tunnels are an excellent option for bringing natural light into small spaces at a lower cost and with a smaller roof penetration than a traditional skylight.
The Takeaway
VELUX skylights are built to last 20 years or more, and many homeowners get 30 years of reliable performance before replacement becomes necessary. The combination of tempered glass construction, the patented three-layer water protection system, and the industry’s only 10-year No Leak installation warranty makes VELUX the strongest choice for any skylight project. Proper installation by a trained professional, regular maintenance, and timely resealing when sealant deteriorates are the three steps that maximize a VELUX skylight’s lifespan and protect your investment over the long term.
If you are planning a new skylight installation, replacing an aging unit, or coordinating skylights as part of a roof replacement, reach out to the team at Lifetime Building Supply. We carry the full VELUX lineup and help builders and homeowners across Central Oregon choose the right skylight for every room. Call us at 541-395-6808 to get started.
