Natural light is a coveted element in any home. It brightens spaces, boosts mood, and can even reduce energy bills. But what if you have a flat roof, typically found on modern homes or additions? Fear not, natural light seekers! Two excellent options exist for bringing sunshine into your flat roof abode: skylights and sun tunnels.

This blog will delve into the key differences between flat roof skylights and sun tunnels to help you make the perfect choice for your needs.

Skylights: Bringing the Outdoors In

Skylights are transparent panels installed directly onto your flat roof, offering a clear view of the sky and ample natural light. They come in various shapes and sizes, allowing for significant design flexibility.

Benefits of Flat Roof Skylights:

  • Abundant Natural Light: Skylights provide the most natural light compared to sun tunnels, transforming dark spaces into bright and airy havens.
  • Ventilation Options: Many skylights open and close, allowing for fresh air circulation and a refreshing breeze.
  • Airy Ambiance: Skylights create a wonderful sense of connection to the outdoors, enhancing the openness of a room.
  • Variety of Styles: From fixed to vented, pyramid to walkable, you can find a skylight to suit your design preferences and functional needs.

Things to Consider with Flat Roof Skylights:

  • Installation Cost: Skylights generally require more complex installation compared to sun tunnels, leading to higher upfront costs.
  • Leak Potential: Flat roofs are more prone to leaks, and skylight installation adds another potential point of entry for water. Proper installation and maintenance are crucial.
  • Energy Efficiency: Skylights can add heat gain in summer and heat loss in winter. However, energy-efficient glazing and proper shading can mitigate this.
  • Limited Night Sky Views: Flat skylights may not offer optimal stargazing opportunities due to their lower profile.

Sun Tunnels: Targeted Light Delivery

Sun tunnels, also known as tubular skylights, are ideal for bringing natural light into rooms that wouldn’t traditionally receive it, like hallways, bathrooms, or interior closets. They consist of a dome on the roof that captures sunlight, a reflective tube that channels it down, and a diffuser that disperses the light at the ceiling. 

Benefits of Sun Tunnels for Flat Roofs:

  • Cost-Effective: Sun tunnels are generally less expensive to install than skylights.
  • Easy Installation: Sun tunnels require a smaller opening in your roof, making installation faster and potentially less disruptive.
  • Leak Reduction: The smaller profile of sun tunnels minimizes the risk of leaks compared to skylights.
  • Targeted Lighting: Sun tunnels deliver concentrated light exactly where you need it, making them perfect for task lighting in kitchens or bathrooms.

Things to Consider with Sun Tunnels:

  • Limited Light Distribution: Sun tunnels provide a more focused beam of light compared to skylights, which bathe a room in natural light.
  • No Ventilation: Sun tunnels do not offer ventilation options like opening skylights.
  • Less Natural Feel: The diffused light from sun tunnels may not replicate the feeling of having a direct view of the outdoors.
  • Style Limitations: Sun tunnels typically come in round or square shapes, offering less design flexibility than skylights.

So, Which Option Should You Choose?

The best choice between a flat roof skylight and a sun tunnel depends on your specific needs and priorities. Consider the following factors:

  • Amount of Light Needed: If you crave the maximum natural light and a connection to the outdoors, a skylight is the way to go. If you need focused task lighting, a sun tunnel might suffice.
  • Ventilation Needs: Do you desire fresh air circulation? Skylights with venting options are your best bet.
  • Budget: Sun tunnels are generally more budget-friendly than skylights.
  • Space Constraints: Sun tunnels work well in tight spaces or where obstacles like roof trusses might block a clear path for a skylight.
  • Design Preferences: Skylights offer more design possibilities, while sun tunnels have a simpler aesthetic.

Additional Considerations

  • Local Building Codes: Always check your local building codes to ensure your chosen installation adheres to regulations.
  • Professional Installation: For both skylights and sun tunnels, hiring a qualified and experienced installer is crucial to ensure proper functionality and minimize the risk of leaks.
  • Energy Efficiency: Look for skylights and sun tunnels with energy-efficient features like double-paned glass and UV coatings.


Flat roof skylights and sun tunnels are both excellent options for bringing natural light into your home. By carefully considering the factors outlined above, you can make an informed decision that best suits your needs and preferences. Bathe your home in natural light and enjoy the benefits it brings, from a brighter mood to a more energy-efficient living space. With the right choice between a flat roof skylight and a sun tunnel, you can transform your home into a haven of natural illumination.

Do you have questions about flat roof skylights or sun tunnels? Are you unsure which option is right for your home? Contact Sky Light Roofing & Restoration today for a free consultation! We’ll help you assess your needs and find the perfect solution to bring sunshine into your life