Types of Skylights
- Fixed skylights let in light only. Simple and dependable.
- Venting skylights open manually or electrically to release heat and humidity, useful in bathrooms and kitchens.
- Tubular skylights or sun tunnels channel daylight through a reflective tube into small spaces.
Modern units, including Velux products, can include low-E glass, rain sensors and integrated blinds to manage heat gain.
Why Skylights Leak
Most leaks come from the flashing, not the glass. Old step flashing rusts, sealant cracks, and shingles around the curb wear out faster than the rest of the roof. Heavy rain and storms test every weak spot. Condensation can look like a leak too, especially in humid bathrooms. We start by finding the real source, and our guide to finding a roof leak explains how.
Reflash the Old Unit or Replace It?
If the unit is sound, reflashing and replacing surrounding shingles often solves the problem. Fogged glass, cracked frames or a unit that has leaked repeatedly usually means replacement. If you are planning a new roof, that is the ideal time to replace older skylights, since new flashing kits integrate with new underlayment. See our roof installation page, or our roof repair service for active leaks.
Installation and Care
We frame the opening, install the curb or deck-mounted unit with a manufacturer flashing kit and underlayment, then finish the interior light shaft. Afterward, keep debris off the skylight, clean glass gently and have flashing checked when the roof is inspected. In rooms that get steamy, such as bathrooms, a venting unit or a good exhaust fan cuts down on condensation that can drip from the frame and stain the drywall around the shaft. We also check attic insulation around the shaft so the opening does not become a hot or cold spot.
Common Questions
How much does skylight installation cost?
Cost depends on skylight type and size, roof pitch, interior shaft work and whether it is a new opening or a replacement. We provide a free estimate after inspection.
Are Velux skylights energy-efficient?
Many Velux models use low-E coated glass and can include shades, which help limit heat gain in summer. Venting models also release trapped hot air.
How long do skylights last?
A quality skylight can last many years, but flashing and seals wear over time. Many homeowners replace skylights when they replace the roof.
How do I maintain my skylights?
Clear leaves and debris, wash the glass gently, and watch for stains on the interior shaft. Have the flashing checked with routine roof inspections.