Installing a skylight can transform your commercial building by bringing in natural light, improving energy efficiency, and enhancing the workspace.

But if it’s installed incorrectly, or in the wrong location it can lead to costly leaks, glare issues, and long-term roof damage.

Before moving forward, here are 5 important questions every property owner or facility manager should ask before installing a commercial skylight.

If you’re in Southern California, our team offers professional commercial skylight installation services along with free roof inspections to ensure your system is done right.

1. Where Would You Install the Skylight?

When you’re considering a skylight, you’ll need to find the perfect place to install it.

Think about how the building sits in comparison to the sunrise and sunset. Position the skylight where you can get the most sun possible during the day.

You’ll also need to take into consideration the position of the building’s rafters. The placement of the rafters will help determine the right place for the skylight.

Not all commercial roofs are ideal for skylights. Flat and low-slope roofing systems require proper curb installation, drainage planning, and reinforced waterproofing.

A professional roof inspection can determine whether your structure can safely support a skylight without increasing the risk of leaks.

2. What Qualities Are You Looking For?

There are standard basics you always want to have on your skylight like being weathertight and wind/load resistance. Other standards for your skylight are being energy efficient and can sufficiently reduce sound.

On top of these, you can also opt for additional qualities to customize your skylight. Look into additions like UV coatings and other shading options. You can also customize what kind of materials your roofing expert uses for the project.

Proper placement is critical. A skylight installed in the wrong location can create excessive heat, glare, or uneven lighting throughout your building.

Strategic placement ensures balanced natural light while minimizing energy loss and occupant discomfort.

3. Do You Want Your Skylight Roof to Be Flat or Have a Dome?

There are different styles you can choose for your new skylight. The most popular types are either flat or dome shape.

Note that most skylights which have a dome will only be available in a thick plastic material. This plastic has a tendency to change colors over time and will need maintenance and cleaning.

If you choose a flat skylight, this will be similar to your normal glass window material. These remain clear longer, but they are more costly.

A dome will be able to have any falling debris such as leaves slide off and to the side of the skylight. You’ll have to clean a flat skylight more often than the alternative.

There are several types of skylights available, including fixed, vented, and tubular options. Each serves a different purpose depending on your building’s ventilation needs, lighting goals, and roof design.

Choosing the wrong type can lead to poor performance and unnecessary costs.

4. How Will the Skylight Be Sealed?

Proper flashing and waterproofing are the most critical parts of any skylight installation.

Poor sealing is one of the leading causes of roof leaks in commercial buildings. Without the correct materials and installation techniques, water intrusion can damage insulation, ceilings, and structural components.

This is why working with an experienced commercial roofing contractor is essential.

5. Who Will Install the Skylight?

Even the highest-quality skylight can fail if it’s installed incorrectly.

Hiring a licensed and experienced commercial roofing contractor ensures proper integration with your roofing system, protecting your investment and extending the life of your roof.

6. When Do You Want to Start This Project?

Timing is crucial for this project. You don’t want to begin the project if there’s any chance of rain.

You don’t want any moisture to get into the open roof. Find the driest season for your area to schedule your installation to increase your chances of success.

A Beautiful and Functional Addition

Installing a skylight roof window can be a big project. It’s best to work with a professional so in the end, you are happy with a skylight that adds light, heat, and style to the existing structure.

Central Roof specializes in providing quality roof repair and maintenance as well as skylight and solar panel installation for those in the Gardena, California area.

Continue reading through our blog for more roofing tips and information.

Q: Do skylights cause roof leaks?
A: Skylights themselves don’t cause leaks—improper installation and poor flashing do.

Q: Are skylights good for commercial buildings?
A: Yes, when installed correctly, they improve natural lighting and can reduce energy costs.

Q: How long do commercial skylights last?
A: Most skylights last 15–25 years depending on materials and installation quality.

Q: Can skylights be installed on flat roofs?
A: Yes, but they require proper curbs and waterproofing systems.