Velux FCM-4646 46-1/2" x 46-1/2" Fixed Curb Mounted No Leak Skylight from the FCM Series

- Item #: BCI1212977

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Configure your Velux FCM-4646 46-1/2" x 46-1/2" Fixed Curb Mounted No Leak Skylight from the FCM Series

  • Blinds more info ►

    Please select your choice of Blinds. Options may include style variation, blackout, manual vs. electrical operation, color selection, or other options.
    • Please Select One
  • Required Flashing Systems more info ►

    Flashing is required for at weather tight installation. Please choose a Flashing System appropriate to your situation.
    • Please Select One
  • A How To Guide to the Velux Skylights Planner Mobile App
    For your convenience VELUX has provided this short video demonstrating how to use VELUX Skylight planner iPhone and Android App. Enjoy!
  • VELUX-Explore Drama Heights
    Enjoy this quick video taking you inside VELUX Drama Heights.

Fixed Curb Mounted Skylight

The patented FCM Fixed Curb Mounted Skylight is sized to work with all types of site-built curbs, whether they're slightly out-of-square, pre-existing, or surrounded by unusually thick flashing and roofing material. Heavy-duty materials ensure the FCM skylight is built to withstand the installation process, as well as anything Mother Nature throws its way. The FCM skylight is designed for simple and weathertight installations on site-built curbs. It features integrated gaskets that provide a thermal break for energy efficiency and seals out water, wind and hassles for years. The FCM skylight is constructed with maintenance free exterior and interior that insulates and strengthens the unit.

  • Installs on roofs with slopes between 0° (0:12) and 60° (20:12)
  • Weathertight installation
  • Quality construction
  • Meets ENERGY STAR® approval guidelines for all climate regions of the US.
  • NFRC rating is substantially better than required by most common building codes.

Energy Efficient Glass Options:

  • Miami-Dade Glass - Special safety glass designed to meet high velocity hurricane codes, including the stringent Miami-Dade code requirements.
  • Impact Glass - Special safety glass designed to meet code requirements for hurricane prone areas.
  • Laminated Glass - Tempered safety glass with extra laminated pane for added safety and comfort.
  • Tempered Glass - Tempered safety glass.
  • White Laminated Glass - Tempered, laminated safety glass with a white coating to provide diffused lighting.

Additional Velux Links

Our SKU: Velux FCM-4646

This product is listed under the following manufacturer number(s):

  • Velux FCM-4646-0006*
    Impact Glass/Aluminum Frame
  • Velux FCM-4646-0004*
    Laminated Glass/Aluminum Frame
  • Velux FCM-4646-0007*
    Miami-Dade Glass/Aluminum Frame
  • Velux FCM-4646-0005*
    Tempered Glass/Aluminum Frame
  • Velux FCM-4646-0008*
    White Laminated Glass/Aluminum Frame

*Denotes a finish or option that has been discontinued

Velux FCM-4646 Product Specifications

Reference Guide
Direct Vent No
Eco Friendly Yes
Energy Star Yes
Finished Frame Height 46.5
Finished Frame Width 46.5
Material Aluminum
Mount Type Curb
Product Weight 85
Rough Opening Height 49.5
Rough Opening Width 49.5
UL Listed Yes

Installation Resource Center

Whether you are installing the product yourself or hiring a professional, our installation Resource Center has everything you need to get your project done. Visit the Installation Resource Center to get started.

Velux FCM-4646 Reviews

  • What is the "U" value of the FCM-4646?

    A. The Velux FCM-4646 has a U value of .60
  • I just purchased 28 impact glass skylights from you and would like to apply a reflective tinting to them. Can it be done and is there a limit to the tint and R value of the product?

    A. Tinting the Velux FCM-4646 will void the warranty, will not help with heat and will ruin the quality of the product. It is not recommended to use tint on windows, a shade should be considered.

Buy the Velux FCM-4646 at Research Velux FCM-4646 online. Find Velux FCM-4646 features and specifications. Get the best deal by comparing the Velux FCM-4646 today.

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× Shipping Rates & Methods

The cost to ship items varies by item, shipment and shipping option.

Free Ground Shipping on Orders Over $49 *

Standard ground shipping transit time is 5-7 business days.

Free Freight Shipping on Orders Over $1500 *

Curb side delivery (also called freight or "LTL" shipping) is reserved for large, heavy, or oversized items like chandeliers, bathtubs, shower doors, etc. Items are palletized and loaded onto a large truck for shipment, and delivered to your curb by scheduled appointment. Transit time is 7-10 business days.

* For exact shipping costs, add the product(s) to your cart and enter your zip code. All offers pertain to the lower 48 states and do not include deliveries to Alaska, Hawaii or Canada.

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