When a Home Skylight Has Reached the End
Skylights age like windows. The sealed glass unit has a desiccant strip in the spacer that soaks up moisture for years until it is saturated. Then the seal fails, moisture gets between the panes and the glass fogs. Flashing rusts or loosens. Old caulk dries and cracks. Wood curbs soften from years of small leaks.
When a skylight is on its second or third repair, replacement is almost always cheaper over ten years. You get a new unit, new flashing, a reset warranty and usually much better glass than the original.
The 5 Signs Your Home Skylight Needs Replacing
- Fogged glass that never clears, a sign of a failed seal and saturated desiccant.
- Drafts or cold spots around the frame in winter.
- Yellowed or cracked acrylic on older dome units.
- Stains that come back after a repair.
- Age over 20 years, when most original flashing and seals are near the end.
Residential Replacement by Room
Kitchens
Grease and steam age seals faster. Replacement is a good time to switch to a venting Velux VS.
Bathrooms
Fogged glass and mould on the shaft. New Low-E glass plus shaft insulation stops condensation.
Hallways and Stairs
Clear glass in place of yellowed acrylic is a huge visual change.
Bedrooms
Add a blackout blind at the same time.
Attics
Older loft skylights are often undersized. Consider enlarging.
Family Rooms and Additions
1980s and 90s additions often had several identical units. Replacing them together saves setup cost.
Sunrooms
Failed glass roof panels get laminated Low-E replacements.
Commercial-Style Replacement for Residential Owners
Multi-Unit Homes and Duplexes
Landlords replace several units in one visit to save mobilization.
Condo Townhouses
Board approval and COI are handled for you.
Home Offices and Studios
Detached studios get venting units for summer comfort.
Rental Properties
Replacements scheduled around tenants with minimal disruption.
Specialty Replacement Options
Same-Size Swap
The quickest route, usually no permit.
Enlargement
Reframe for a bigger unit and more light.
Fixed to Solar
Upgrade to a Velux VSS for remote opening and rain sensing.
Brand Switch
Non-Velux units replaced with a Velux FCM curb-mount. See Velux replacement.
Permanent Removal
Close the opening completely if you no longer want a skylight.
Materials Used on Home Replacements
| Component | Standard spec |
|---|---|
| Unit | Velux FS, VS, VSS or Fakro FTT |
| Glass | Low-E 272, laminated interior |
| Flashing | New EDL/EDW kit or step flashing |
| Underlayment | Grace Ice & Water Shield, full curb |
| Shaft | Roxul batt, 6-mil poly vapour barrier where missing |
Our Replacement Expertise
We replace hundreds of residential skylights, and the removal tells us how the old one failed. That matters, because if the shaft was never insulated or vapour-sealed, a new unit will still drip condensation. We fix the cause, not just the glass.
What Actually Stops Homeowners From Replacing
“It still mostly works.”
In our opinion, mostly working is when you should plan it, before water reaches the insulation and framing.
“It’s going to be expensive.”
Same-size swaps start at $2,200 and usually skip the permit.
“I’ll lose a day of my life to construction.”
One day, drop sheets, dust control and a vacuum at the end.
“The new one will leak like the old one.”
Not with new flashing every time and a lifetime flashing warranty.
Residential Replacement Timeline
Day 1 to 3: Assessment
Free visit, diagnosis, quote.
Weeks 1 to 3: Ordering
Units ship from Velux Canada or Fakro Canada.
Replacement Day
Usually one day.
Wrap-Up
Trim, drywall touch-up, warranty registration.
Residential Replacement Cost in Toronto: What You Are Paying For
The New Unit
Fixed costs least; solar most.
Removal and Disposal
Always included.
Flashing and Underlayment
New kit and ice and water shield on every job.
Curb Repair
Only if rot is found.
Enlargement
Framing and permit when the opening grows.
Interior Finish
Trim and drywall touch-ups.
Residential Replacement vs Installation vs Repair: Which Service You Need
Existing opening, failing unit: replacement. No skylight yet: residential installation. Sound unit with one drip: leak repair first.
Fixed, Venting or Solar: Choosing Your Skylight Type
Fixed for light, venting for airflow, solar for remote control and automatic rain closing. Replacement is the cheapest time to upgrade.
Residential Skylight Replacement Timeline in Toronto: What to Expect Week-by-Week
Assessment in week one, delivery in weeks two to three, replacement in a day. Enlargements add permit time.
Why Homeowners Trust Our Replacement Crews
Honest advice, new flashing everytime and a fresh warranty. That is the whole pitch.
