A fixed curb mount skylight is a non-opening roof window installed on a raised curb. The VELUX FCM models are suited to buyers comparing glass sizes and shade options, while the Natural Light double-dome model is an alternative for shoppers seeking an acrylic dome and welded aluminum frame. Confirm curb dimensions and installation requirements before choosing a unit.
| Product | Best For | Listed Standout |
|---|---|---|
| VELUX FCM Fixed | Buyers seeking a basic fixed model | Fixed curb-mount design |
| VELUX FCM 2246 | Buyers wanting a longer glass skylight | LowE3 tempered glass and solar shade |
| VELUX FCM 2222 | Buyers comparing a compact square size | LowE3 tempered glass and solar shade |
| Natural Light Double Dome | Buyers considering an acrylic dome | High-impact double dome |
| VELUX FCM 2230 | Buyers wanting laminated glass | LowE3 laminated glass and solar shade |
VELUX FCM Fixed Curb Mount Skylight
This VELUX FCM is a fixed curb-mount skylight from a manufacturer specializing in skylights and roof windows. Its listed product information does not specify glass construction, dimensions, shade options, or frame finish, so buyers should check the exact listing details before comparing it with more fully described models.
Best for: Buyers who want to start with a straightforward fixed VELUX model and do not need a specific shade or glass type based on the information provided. It was selected as a direct match for the fixed curb-mount search.
Consideration: The supplied features are limited. Avoid choosing this model until you have confirmed its size and glazing match the project.
VELUX FCM 2246 With Solar Shade
The FCM 2246 is listed with tempered LowE3 glass and a solar room-darkening shade. Its stated outside curb dimensions are 25.5 by 49.5 inches, with a gray frame and clear glass. The manufacturer describes its skylights as energy-efficient designs intended to bring natural light into homes.
Best for: Buyers seeking a longer rectangular glass skylight with a room-darkening shade. The listed dimensions help make this a more specific choice than models with unspecified sizing.
Consideration: Confirm the outside curb dimensions against the existing curb or planned roof opening. Do not assume these measurements describe the rough opening.
VELUX FCM 2222 Compact Skylight
This FCM 2222 version has tempered LowE3 glass and a solar room-darkening shade. The listed outside curb size is 25.5 by 25.5 inches. Its square dimensions distinguish it from the longer 2246 and 2230 configurations in this selection.
Best for: Buyers who need a compact square skylight and want the listed glass and shade features. It was selected for shoppers comparing a smaller-format VELUX option.
Consideration: The product information gives outside curb dimensions, not every installation measurement. Check the curb and mounting details before ordering.
Natural Light Double Dome Skylight
This Light Energy Systems model is a 2-by-2-foot curb-mount skylight designed to mount on a roofer-installed curb. Its features include a double-dome, high-impact acrylic design and a welded aluminum frame described as providing added strength. It offers a different material approach from the glass VELUX models.
Best for: Buyers comparing an acrylic dome with glass skylights, particularly when a 2-by-2-foot model fits the project. It was selected for its distinct dome construction and clearly stated curb-mount purpose.
Consideration: The listed features do not specify a room-darkening shade or glass glazing. Choose another model if those features are essential.
VELUX FCM 2230 Laminated Glass
The FCM 2230 is listed with laminated LowE3 glass and a solar room-darkening shade. Its outside curb dimensions are 25.5 by 33.5 inches, and it has a gray frame with clear glass. These details make it a middle-length option between the listed 2222 and 2246 sizes.
Best for: Buyers who want a laminated-glass configuration with a solar room-darkening shade. It was selected because its stated dimensions and glazing type make it easy to distinguish from the tempered-glass options.
Consideration: Confirm that the laminated-glass specification and outside curb size suit the project; do not infer other performance characteristics from the product name alone.
Buying Guide: How to Choose a Fixed Curb Mount Skylight
Which dimensions should you compare?
Start with the curb already installed or the curb specified for the roof project. The VELUX sizes above are identified as outside curb dimensions. Compare those measurements with the product’s installation instructions and the actual curb; outside dimensions may not be the same as the opening required for installation. The Natural Light listing gives a 2-by-2-foot size and says it mounts on a roofer-installed curb.
Should you choose glass or a dome?
These products offer two basic approaches. The VELUX selections list glass, including tempered or laminated LowE3 configurations. The Natural Light model lists a double-dome, high-impact acrylic design and welded aluminum frame. Compare the materials and product documentation against your roof design and preferences rather than assuming the options perform identically.
When does a solar room-darkening shade matter?
The FCM 2246, 2222, and 2230 listings include a solar room-darkening shade. Consider these models if controlling incoming daylight is important. The other listings do not specify a shade, so verify the exact product configuration if shading is a requirement.
What should you verify before ordering?
- Match the stated dimensions to the curb and installation instructions.
- Confirm whether the product is the glass or dome configuration you want.
- Check whether a shade is included in the specific model listing.
- Review roof and installation requirements with a qualified installer when needed.
Frequently Asked Questions
What is a fixed curb mount skylight?
It is a non-opening skylight designed to mount on a raised curb on the roof.
Do fixed skylights open for ventilation?
The products listed here are identified as fixed skylights. Their supplied features do not describe an opening or ventilation function.
What is the difference between the VELUX 2222 and 2246?
The listed outside curb size is 25.5 by 25.5 inches for the 2222 and 25.5 by 49.5 inches for the 2246. Both list tempered LowE3 glass and a solar room-darkening shade.
Which listed option has laminated glass?
The VELUX FCM 2230 listing specifies laminated LowE3 glass and a solar room-darkening shade.
Does every product include a shade?
No. A solar room-darkening shade is specified for the VELUX 2246, 2222, and 2230 listings. The other supplied product details do not specify one.