Skylights
Custom Skylights
Installation Type & Flashing Systems
VELUX Skylight Systems can be installed multiple ways and are compatible with our flashing systems, designed to shed water without relying on sealants that can break down over time. This variety of options for our skylights ensures a weathertight fit for virtually all roof types and slopes.
How It Works
Your skylight's mounting type and flashing kit work together to create a sealed system that keeps weather out.
01. Mounting Types
The mounting type determines how the skylight attaches to your roof. There are three main types of mount:
Deck-Mounted
The skylight is installed directly onto the roof deck. This offers a sleeker look on the roofline, ideal for new roofs or full replacements.
Curb-Mounted
The skylight is attached to the top of a framed "curb" built onto the roof. Great for replacing older skylights and for flat or low-sloped roofs.
Self-Flashed
With the flashing built in, no additional kit is needed. Skylights with this mount type are placed directly over the rough opening in the roof and sealed into place.
02. Flashing Systems
Once the skylight is mounted, a flashing system is installed to protect the skylight from weather and water leaks. Flashing systems vary by the mount.
Deck-Mounted Flashing Systems
Comprised of adhesive underlayment and engineered flashing.
Curb-Mounted Flashing Systems
Consisting of adhesive underlayment and engineered flashing.
Systems by Roof Type
Which system is right for your roof?
-
- Recommended Mount Type
Deck-Mounted
Matching Flashing SystemEDL (Deck)
NotesMost common residential roof. Works with standard flashing kits.
- Recommended Mount Type
Deck-Mounted
Matching Flashing SystemEDM (Deck)
NotesDesigned to integrate with ribbed or standing seam metal panels.
- Recommended Mount Type
Deck-Mounted or Curb-Mounted
Matching Flashing SystemEDW (Deck), ECW (Curb)
NotesIncludes risers/spacers to accommodate tile height and prevent water traps.
- Recommended Mount Type
Curb-Mounted or Self-Flashed
Matching Flashing SystemECL, ECW (Curb) or Self-Flashed
NotesCurb is raised, allowing for easier drainage.
Deck-mounted skylights are not suitable for low slopes.
- Recommended Mount Type
Deck Mounted or Curb Mounted
Matching Flashing SystemEDL (Deck) or ECL (Curb) flashing recommended
NotesAdditional step tins available from VELUX are needed.
Expert Help
Connect with a VELUX Design and Product Advisor for a free consultation, or search our nationwide network of VELUX-trained pros to find an installer near you.
