VELUX FCM fixed curb mount skylights are ideal for replacing existing curb mount skylights, including old plastic bubble skylights. It can be installed on a flat roof at 0° up to a 60° roof pitch on a site-built curb. VELUX skylights are an energy-efficient way to bring sunlight into a home and make dark rooms come to life, all while maintaining privacy. Installing a skylight is one of the most impactful ways to enhance the brightness and beauty of a room.
- Inside curb dimensions for 4646 models are 46-1/2 in by 46-1/2 in and outside curb dimensions are 49-1/2 in by 49-1/2 in
- Qualifies for a 10-year "No Leak" installation warranty when installed with ECL 4646 flashing on a shingle roof with a pitch between 10° and 60° or ECW 4646 flashing on a tile roof with a pitch between 14° and 60° (flashing kits are sold separately)
- Order VELUX ECL 4646 flashing if you have a shingle, shake, or slate roof, or VELUX ECW 4646 flashing if you have a tile roof
- Features Clean, Quiet and Safe LowE3 laminated glass with a Neat® glass coating that keeps your skylight cleaner, reduces unwanted outside noise, and comes with a 10-year hail warranty against glass breakage
- Consists of double paned argon gas filled LowE3 glass that provides excellent energy performance for year round comfort, plus the added safety of laminated glass, which building codes require for out of reach applications
- Features tempered, Low-E3, argon-filled, double paned glass, which is recommended for in-reach applications
- Please note: VELUX recommends and most building codes require laminated glass for out of reach applications
Blinds Included: No
Color/Finish Family: Gray
Exterior Material: Aluminum
Flashing Included: No
Frame Color/Finish: Neutral Gray
Mounting Style: Curb mount
Primary Use: Residential
Skylight Style: Fixed
Warranty: 10-year limited
Glass Type: Tempered glass over laminated glass
Glazing Type: Laminated
Glass Type: Tempered glass over tempered glass
Glazing Type: Tempered
Actual Height (in.): 3
Actual Length (in.): 51.375
Actual Width (in.): 51.375
Outside Frame/Curb Height (in.): 49.5
Outside Frame/Curb Width (in.): 49.5
Rough Opening Height (in.): 3
Rough Opening Length (in.): 46.5
Rough Opening Width (in.): 46.5
Shipping & Lead Times
*Lead times are not guaranteed.
Please call our office for updated lead times.
Order shipping within the 48 Continental United States will ship freight with a flat rate fee based on the order total provided that oversized, common carrier, special handling or expedited freight do not apply.
Skylightsforless is not responsible for any return product shipping costs.
Items shipped outside of California and New York will not be charged sales tax.
To view our shipping rates, please click here.
Returns, Exchanges, & Refunds
Returns are not accepted for the following items:
- Commercial sun tunnels
- Commercial skylights
- Custom-built skylights
- Skylights with factory-installed blinds (blinds included)
- Custom blinds
Payment & Security
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