If your skylight replacement in Toronto has been on your to-do list for years, you are not alone. Many Toronto homeowners live with old, yellowed, leaking, or fogged-up skylights for far too long, not realizing how much a modern replacement can transform their home. Today VELUX skylights are dramatically more energy-efficient, leak-proof, and beautiful than the skylights installed in homes even 10 to 15 years ago.
In this comprehensive guide, Toronto Skylight Installers covers everything you need to know about replacing your old skylight: when it is time, what it costs, what options are available, and why professional installation matters.
Signs Your Toronto Skylight Needs Replacement
Skylights do not last forever. Most older acrylic dome skylights have a lifespan of 15 to 25 years before they begin failing. Here are the most common warning signs:
- Yellowed or Discoloured Glass: Older acrylic dome skylights turn yellow and hazy over time due to UV degradation. This blocks natural light and makes your ceiling look dingy.
- Condensation Between Panes: If you see moisture or fog trapped between the two layers of glass, the seal has failed. This cannot be repaired and requires a full unit replacement.
- Persistent Leaks: Water stains around the skylight frame, dripping during rain, or soft spots in the drywall around the opening all indicate flashing failure or frame deterioration.
- Cracked or Chipped Glass: Any crack in the skylight glass is a safety hazard and a leak waiting to happen. Tempered or laminated glass skylights should be replaced immediately if damaged.
- Difficulty Opening or Closing: If your venting skylight no longer opens or closes properly, the hardware or operator mechanism has likely corroded or failed.
- Drafts and Cold Air: If you feel cold air coming from around your skylight during Toronto winters, the weatherstripping and seals have degraded and the unit is no longer energy-efficient.
Skylight Replacement Cost in Toronto (2026)
The total cost of a skylight replacement depends on the type of skylight, the size, the roof access difficulty, and whether the framing or flashing needs to be rebuilt.
| Skylight Type | Unit Cost (VELUX) | Installation Cost | Total Installed |
|---|---|---|---|
| Fixed Skylight (FCM/FS) | $400 – $800 | $800 – $1,500 | $1,200 – $2,300 |
| Manual Venting Skylight | $600 – $1,000 | $900 – $1,600 | $1,500 – $2,600 |
| Solar Powered Fresh Air (VSS) | $1,200 – $1,800 | $1,000 – $1,800 | $2,200 – $3,600 |
| Electric Fresh Air (VSE) | $1,400 – $2,000 | $1,200 – $2,000 | $2,600 – $4,000 |
| Sun Tunnel (TMR/TMF) | $300 – $600 | $500 – $1,000 | $800 – $1,600 |
| Flat Roof Skylight (FCM) | $800 – $1,500 | $1,200 – $2,000 | $2,000 – $3,500 |
Prices reflect 2026 Toronto-area rates for certified VELUX installation. Costs may be higher for steep or difficult-to-access roofs, very large openings, or projects requiring structural modifications to the roof frame.
VELUX Skylight Options for Toronto Homes
As a certified VELUX installer, Toronto Skylight Installers recommends and installs the full range of VELUX residential skylights. Here is how they compare:
| Model | Type | Best For | Key Feature |
|---|---|---|---|
| Fixed Skylight (FS) | Non-opening | Hallways, stairwells, closets | Maximum light, lowest cost, no ventilation |
| Manual Fresh Air | Hand-operated venting | Accessible ceilings | No electricity needed, simple operation |
| Solar Powered Fresh Air (VSS) | Solar-powered venting | Hard-to-reach ceilings | No wiring required, remote controlled, eligible for energy rebates |
| Electric Fresh Air (VSE) | Electric-powered venting | Kitchens, bathrooms | Rain sensor auto-close, wired power, reliable in all conditions |
| Sun Tunnel (TMR/TMF) | Tubular daylight device | Interior rooms, hallways | Smallest roof footprint, brings light to rooms without direct roof access |
| Flat Roof Skylight | Fixed, for flat/low-slope | Flat roof homes, additions | Specifically engineered for low-slope applications with proper drainage |
The Skylight Replacement Process
A professional skylight replacement by our certified team follows a precise, proven process:
- Roof Inspection and Measurement: We inspect the existing skylight, measure the rough opening, assess the condition of the surrounding shingles and flashing, and check the interior light shaft for any moisture damage.
- Selection and Ordering: Based on the inspection, we recommend the ideal VELUX model, size, and features for your space. We order the skylight with the correct flashing kit for your specific roof type (shingle, flat, or metal).
- Removal of Old Skylight: We carefully remove the old skylight unit without damaging the surrounding roofing. All old flashing and sealant is stripped away to expose the clean rough opening.
- Frame Inspection and Repair: With the old unit removed, we inspect the 2×4 or 2×6 curb framing for rot, moisture damage, or structural weakness. Any damage is repaired or the entire curb is rebuilt before the new unit goes in.
- New Skylight Installation: The new VELUX skylight is installed into the opening using manufacturer-specified fasteners, shims, and sealant. Proper alignment is critical for water tightness and smooth operation (for venting models).
- Flashing Installation: The VELUX engineered flashing kit is installed step by step, integrating with your existing roofing material to create a completely watertight seal. This is the most critical step for preventing future leaks.
- Interior Finishing: The interior light shaft is insulated, drywalled if needed, and trimmed to create a clean, finished look from inside the home.
- Final Inspection: We test the operation (for venting models), verify water tightness, clean all glass surfaces, and walk the homeowner through the features and maintenance requirements.
Why Professional Installation Matters
Skylight installation is not a DIY project. The consequences of improper installation include chronic leaks, ice dam formation around the opening, heat loss during Toronto winters, and even structural damage from water infiltration. Professional installation by a certified VELUX installer ensures:
- Manufacturer Warranty Protection: VELUX warranties are only valid when the skylight is installed by a certified installer using approved flashing systems. DIY or handyman installation voids the warranty.
- Proper Flashing Integration: The flashing must be woven into the existing roofing material in a specific sequence. Improper flashing is the number one cause of skylight leaks, and it is almost impossible to diagnose and fix without removing the skylight entirely.
- Energy Efficiency: Proper insulation of the light shaft and correct sealing around the frame prevents heat loss. A poorly installed skylight can increase your heating bill by 10% to 20% during Toronto winters.
- Safety: Working on a roof is inherently dangerous. Our installers are trained in fall protection, carry WSIB coverage, and follow all Ontario safety regulations.
Energy Efficiency and Rebates
Modern VELUX skylights are dramatically more energy-efficient than older units. Features like Low-E glass coatings, argon gas fills, and insulated frames reduce heat loss in winter and heat gain in summer. The solar-powered VELUX VSS model is particularly popular because it qualifies for energy efficiency rebates under certain Canadian programs, requires no electrical wiring, and operates on a built-in solar panel and battery system that works even on cloudy Toronto days.
Many Toronto homeowners are also pairing their skylight replacement with VELUX blinds and shades. Options include room darkening shades for bedrooms, light filtering shades for living areas, and venetian shades for adjustable light control. Solar-powered blinds are available that run on the same solar cell as the VSS skylight, requiring zero wiring.
Common Questions About Skylight Replacement Timing
Toronto homeowners often wonder about the best time of year for skylight replacement. The ideal window is late spring through early fall (May to October) when the weather is consistently dry and warm. However, our team performs replacements year-round. Winter installations require additional precautions for weather protection during the brief period when the roof is open, but are entirely feasible for experienced professionals.
If your skylight is actively leaking, do not wait for ideal weather. Water damage to your ceiling, insulation, and framing gets exponentially worse with every rain event. Contact us for an emergency skylight repair assessment, and we will determine whether a temporary repair or immediate full replacement is the best course of action.
Skylight Replacement vs. Skylight Repair: Which Do You Need?
Not every skylight problem requires a full replacement. Understanding the difference between a repair and a replacement can save you money if the issue is minor, or prevent you from wasting money on temporary fixes for a skylight that truly needs to be replaced.
| Issue | Repair Possible? | Replacement Needed? |
|---|---|---|
| Minor leak around flashing | Yes — re-flash and reseal | Only if frame is rotted |
| Cracked or broken glass | No | Yes — full unit replacement |
| Foggy/condensation between panes | No — seal failure is permanent | Yes — glass unit or full skylight |
| Yellowed acrylic dome | No — UV degradation is permanent | Yes — upgrade to modern glass |
| Operator mechanism broken | Sometimes — parts may be available | If parts discontinued, yes |
| Drafty / poor insulation | Possible with weatherstripping | Yes, if frame is warped or deteriorated |
As a general rule, if your skylight is more than 20 years old and experiencing any of the issues above, full replacement with a modern VELUX unit is almost always more cost-effective than repeated repairs. The energy savings alone from a modern Low-E argon-filled glass unit will offset a significant portion of the replacement cost within 5 to 7 years.
Skylight Placement and Sizing Considerations
If you are replacing a skylight and considering changing the size or location, there are important factors to consider. The amount of natural light a skylight provides depends on its size, the orientation of your roof, and the depth of the light shaft. North-facing skylights provide consistent, diffused light throughout the day without direct glare, making them ideal for home offices and kitchens. South-facing skylights provide the most total daylight but can cause excessive heat gain in summer without proper blinds or Low-E glass.
VELUX recommends that skylight area should be approximately 5% to 15% of the floor area of the room being lit. For a 200 square foot room, this translates to a skylight between 10 and 30 square feet. Larger skylights provide more dramatic natural light but also require more robust framing and flashing, which increases installation cost. Our team at Toronto Skylight Installers will assess your roof structure, room layout, and lighting goals to recommend the optimal size and placement during our free consultation. We take into account your roof pitch, attic depth, nearby vent stacks, and structural framing to ensure the skylight is positioned for maximum light with minimum complications.
How much does skylight replacement cost in Toronto?
A standard skylight replacement in Toronto typically costs between $1,200 and $3,600 fully installed, depending on the type of skylight (fixed vs. venting), the size, and the difficulty of roof access. Solar-powered venting models are at the higher end, while fixed skylights and sun tunnels are the most affordable options.
How long does it take to replace a skylight?
A single skylight replacement typically takes 4 to 6 hours for a straightforward swap, including removal of the old unit, frame inspection, new unit installation, flashing, and interior finishing. Multiple skylights or those requiring frame rebuilds may take a full day or two.
Can I replace my old dome skylight with a modern flat glass skylight?
Yes. This is one of the most common upgrades we perform. Old acrylic dome skylights can be replaced with modern VELUX flat glass units in the same rough opening. The new unit will be dramatically clearer, more energy-efficient, and significantly more attractive from both inside and outside your home.
Will replacing my skylight damage my roof?
Not when done by a certified installer. We carefully remove the old unit and flashing without disturbing surrounding shingles. The new VELUX flashing kit integrates seamlessly with your existing roofing material. If any shingles are damaged during the process, we replace them to ensure a watertight, clean finish.
Is a solar-powered skylight worth the extra cost?
Absolutely. The VELUX solar-powered fresh air skylight (VSS) costs approximately $800 to $1,000 more than a fixed unit but provides hands-free ventilation via remote control, requires no electrical wiring, and may qualify for energy efficiency rebates. The built-in solar panel charges reliably even in Toronto winter conditions.
How do I know if my skylight is leaking or just condensating?
Condensation typically appears as uniform moisture on the glass surface during cold weather and clears when the temperature rises. A leak produces water drips or stains around the frame, on the light shaft walls, or on the ceiling below. If you are unsure, contact Toronto Skylight Installers for a professional inspection to determine the exact cause and recommend the right solution.
Ready to replace your old, leaking, or foggy skylight? Contact Toronto Skylight Installers for a free consultation and detailed quote. As certified VELUX dealers and installers, we bring expert craftsmanship, manufacturer-backed warranties, and years of Toronto roofing experience to every skylight replacement project. Call us today at (416) 365-7557.
