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VELUX Self-Flashed Polycarbonate Double Dome Skylight
Regular price $244.66Orders start at $399 — combine any items to reach the minimum. Learn more
VELUX Self-Flashed Polycarbonate Double Dome Skylight
The VELUX self-flashed polycarbonate double dome skylight brings natural light to flat and low-slope roof applications without curbs or curb flashing. Nine sizes in this line cover common rough openings from roughly 14 x 14 in. up to 46 x 46 in. One skylight is sold per unit.
Key Features:
- Self-flashed design: Self-flashed installation eliminates the need for a site-built curb and separate curb flashing.
- Double dome: Twin polycarbonate domes provide an insulating air space between layers.
- Polycarbonate glazing: Impact-resistant polycarbonate domes stand up to weather exposure on flat and low-slope roofs.
- Wide size range: Nine sizes including SFRD 2222, 2246, 3434, 4646 and SFDA 1414, 2222, 2246, 3434, 4646 cover most common applications.
- Fixed operation: Fixed double dome units provide daylighting with no moving parts to maintain.
Specifications Table:
| Specification | Details |
|---|---|
| Brand | VELUX |
| Sell unit | 1 skylight |
| Product line | VELUX self-flashed skylights |
| Available sizes | ['SFRD 2222 20BC', 'SFRD 2246 20BC', 'SFDA 2222 23WC', 'SFDA 2246 23WC', 'SFRD 3434 20BC', 'SFRD 4646 20BC', 'SFDA 1414 23WC', 'SFDA 3434 23WC', 'SFDA 4646 23WC'] |
| Material | Polycarbonate |
| Construction | Double dome |
| Mounting | Self-flashed, no curb required |
| Operation | Fixed |
| Intended use | Flat and low-slope roof daylighting |
| Pack quantity | 1 |
Coverage & How Much You Need:
Each unit daylights one rough opening; size the skylight to the designated rough opening indicated by the model number (for example, a 2222 unit suits a 22-1/2 in. x 22-1/2 in. opening, per VELUX sizing conventions).
Fit and Compatibility:
Self-flashed models are designed for direct deck mounting on flat or low-slope roofs without a curb. Confirm the selected size against the rough opening before ordering; flashing kits and interior finishing are supplied separately.
Frequently Asked Questions (FAQ):
Q: What does self-flashed mean?
A: The unit includes its own integral flashing so it mounts directly without a site-built curb or separate curb flashing.
Q: What sizes are available?
A: Nine sizes: SFRD 2222, 2246, 3434, 4646 and SFDA 1414, 2222, 2246, 3434, 4646.
Q: What is the dome made of?
A: Impact-resistant polycarbonate in a double dome configuration with an insulating air space.
Q: Is this skylight fixed or venting?
A: The double dome line listed here is fixed; venting models are a separate VELUX product family.
Q: How do I pick the right size?
A: Match the model's rough opening dimensions to your deck opening and confirm with VELUX sizing guides before cutting.
Q: How many come in an order?
A: One skylight per unit; order one per opening.
Expert Verdict — Reviewed by the SuperArbor Pro Desk
Self-flashed polycarbonate domes are the economical choice for utility daylighting on flat roofs where a curb adds cost and leak risk. The 20BC versus 23WC suffixes denote different glazing options; verify the exact dome configuration for your application. Check the roof membrane detail at the self-flashed perimeter and follow VELUX installation instructions to keep the warranty intact.
Roof openings created for skylight installation must be guarded or covered until the unit is fully secured to prevent falls.
Choose a VELUX self-flashed double dome skylight for dependable natural light on your flat roof.
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