Curb-Mounted Skylights vs. Deck-Mounted Skylights: Choosing the Right Fit

Posted on April 30, 2024

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Curb-Mounted Skylights vs. Deck-Mounted Skylights: Choosing the Right Fit

Are you thinking about whether or not to install a skylight in your home? If yes, then you are in the right place. 

With years of experience in the roofing industry, I can tell you for sure that skylights can be a great addition to your roof. Skylights not only have the ability to brighten up your living space, but can also provide fresh air and a sense of openness.  

However, choosing the right type of skylight can be a perplexing decision. Should you go for a curb-mounted skylight or a deck-mounted skylight?

Curb-Mounted Skylights: Timeless Elegance and Efficiency

Curb-mounted skylights have long been a symbol of timeless elegance in home design. Their classic appearance and numerous benefits have made them a popular choice among homeowners looking to add natural light to their living spaces.

What Is A Curb-Mounted Skylight? 

As the name suggests, this is a skylight that the contractor will install on a curb. Before installing the skylight panel, a wooden frame (the curb) is built and cut into the roof.  Over this, the skylight is placed, which gives it an outward appearance, also setting it apart from deck-mounted skylights, also our next topic of discussion. 

Usually, the curb-mounted skylight is created using 2×6 lumber, which forms the standard curb size. However, these curbs can be custom-built to fit the exact specifications of the skylight, ensuring seamless and watertight integration with your roofing system. 

Advantages Of Curb-Mounted Skylights

Curb-Mounted Skylights

Higher Sunlight: 

Curb-mounted skylights are strategically positioned higher on your roof. This elevated placement maximizes the amount of sunlight that enters your living space, creating a vibrant and inviting atmosphere.

Versatility in Size and Shape

The design flexibility of curb-mounted skylights is another key feature that makes them a favored choice among homeowners and architects. These skylights can be customized in various sizes and shapes to align with your architectural preferences and the unique layout of your home.

Easy To Install & Replace

As a homeowner, you want a project completed without any hold-ups or hassle. A curb-mounted skylight installation is exactly like this. Your roofing contractor will be able to install it faster in comparison to other types of skylights. You also won’t have to wait for a shipment of materials, as 2×6 lumber is widely available. 

These skylights are even easier to replace, reducing labor costs. Because the skylight is installed over the curb, and has separate flashing, you can replace this type of skylight without worrying about reflashing the entire unit. 

Leak-Proof Design

One of the primary concerns when it comes to skylights is the potential for leaks. Curb-mounted skylights are designed with leak prevention in mind. When correctly installed and sealed, they create a tight and secure seal between the skylight and the roof. 

Deck-Mounted Skylights: Modern Elegance and Simplicity

Deck-mounted skylights offer a modern and streamlined approach to introducing natural light into your home. They are designed to be installed close to the roof deck, and are a better option for pitched roofs, providing a clean and contemporary aesthetic.

What Is A Deck-Mounted Skylight? 

The deck-mounted skylight got its name from the way that it is installed. Unlike a curb-mounted skylight, which is installed on top of a raised curb, the deck-mounted skylight is directly installed on top of the roofing material and typically has a low profile.  

Advantages Of A Deck-Mounted Skylight

Deck-Mounted Skylight

Great Aesthetic 

The standout feature of a deck-mounted skylight is its sleek and modern design. As these are installed directly on the roof, and not on a separate curb, these skylights seamlessly blend with contemporary and minimalist architectural styles.


Deck-mounted skylights often require less maintenance compared to their curb-mounted counterparts. The absence of a raised curb increases energy efficiency and reduces the risk of debris accumulation. With occasional cleanings and routine inspections, you can ensure that your deck-mounted skylight continues to perform optimally.

Choosing the Right Fit

Selecting the right skylight for your home ultimately depends on your specific requirements and the style of your property. Here are some factors that you need to consider, before you make your final decision. 

1. Roof Pitch

Curb Mounted: These skylights are ideal for roofs with a lower pitch. These are also your go-to options if your property has a flat roof.  This is because the raised curb helps with water drainage, which is often the problem on flat roofs.  

Deck Mounted: Deck-mounted skylights, on the other hand, are more suitable for roofs with a higher pitch (more than 14 degrees). These offer a sleek look and better seal. 

2. Aesthetic Preferences

Curb Mounted: Great for homes with a more traditional or classic architectural style.

Deck Mounted: Perfect for contemporary or modern homes, thanks to their modern, and sleek design. Curb-mounted skylights seem bulky as they are built on a raised platform. 

3. Insulation Needs

If energy efficiency and insulation are top priorities, deck-mounted skylights may be the better choice.

You can install a curb-mounted skylight if you live in milder climates where insulation is less of a concern.

4. Installation Complexity

As we have already talked about above, a curb-mounted skylight is easier to install and may be a suitable DIY project for those with some roofing experience. If you have none, it’s essential that you call a contractor. 

On the other hand, expect a more complex installation with a deck-mounted skylight as they may require professional assistance. Overall, getting assistance is a good idea. 

Install A Brand New Skylight With Our Team At Capital Roofing

We hope that after reading this blog post, you are now more aware of two of the most popular types of skylight. Whether you decide to install a curb-mounted skylight or a deck-mounted skylight, or just have a few questions, Capital Roofing is your go-to contractor with all the answers. 

We install the best skylights from leading manufacturers. Contact us today at (918) 260-4075, and find out how we can help you!  

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