When should you replace your skylight? Here are the signs that repair isn't enough and replacement makes more sense.
In this guide
Age-Based Replacement
Skylights have finite lifespans:
| Skylight Type | Expected Life |
|---|---|
| Acrylic dome | 10-15 years |
| Glass, aluminum frame | 15-25 years |
| Glass, vinyl frame | 20-30 years |
| High-end units | 25-40 years |
If your skylight approaches these ages, replacement often makes more sense than major repairs.
Visible Damage Signs
Glazing Problems:
- Cracks in acrylic or glass
- Yellowing or hazing (acrylic)
- Failed seal (fogging between panes)
- Scratches affecting light quality
Frame Deterioration:
- Cracked or warped frames
- Rust on metal components
- Wood rot on wooden frames
- Gaps between frame and curb
Flashing Issues:
- Corroded or cracked flashing
- Separated from roof membrane
- Multiple repair attempts
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Replace when skylights no longer function properly:
Chronic Leaking:
If you've repaired leaks multiple times, the unit itself may be compromised. Repeated repairs add up—often exceeding replacement cost.
Condensation:
- Moisture between glass panes (seal failure)
- Persistent interior condensation
- Water stains on ceiling below
Operation Issues (vented units):
- Won't open or close properly
- Mechanism broken or jammed
- Seals don't hold when closed
Energy Loss:
- Noticeable drafts
- Excessive heat gain/loss
- Old single-pane units
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Code and Insurance Considerations
Replacement may be required for:
- Hurricane-rated glass requirements
- Insurance policy requirements
- Home sale inspections
- Building code updates
Modern skylights have significantly better energy ratings and impact resistance than older units.
Repair vs Replace Analysis
Repair Makes Sense When:
- Skylight is under 10 years old
- Issue is minor (resealing, small leak)
- Frame and glazing are sound
- Problem is clearly in flashing only
Replace Makes Sense When:
- Skylight exceeds 15-20 years
- Multiple issues present
- Glazing is damaged or degraded
- Repeated repairs haven't solved problem
- Energy efficiency matters
- Insurance or code requires upgrade
Cost Comparison
| Action | Cost Range |
|---|---|
| Minor seal repair | $200-500 |
| Flashing replacement | $500-1,000 |
| Full replacement (2x4) | $1,000-2,500 |
| Premium replacement | $2,000-4,000 |
A $400 repair on a 20-year-old skylight may not be worth it when replacement offers 20+ more years of service.
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Replacement Benefits
New skylights offer significant improvements:
Energy Efficiency:
- Low-E coatings reduce heat gain
- Double or triple pane insulation
- Better air sealing
Impact Resistance:
- Hurricane-rated options available
- May qualify for insurance credits
Reduced Maintenance:
- New seals and flashing
- Modern materials last longer
- Fresh warranty coverage
Improved Aesthetics:
- Clean, clear glazing
- Updated frame styles
- Better light transmission
Replacement During Reroofing
The best time for skylight replacement is during roof replacement:
- Single mobilization cost
- New flashing integrates properly
- Warranty covers both
- No disruption of new roof
If your roof is being replaced and skylights are over 10 years old, strongly consider replacing them simultaneously.
Our Skylight Services
We handle both skylight repair and replacement, and can help you determine which makes sense for your situation. Contact us for a free evaluation.
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