Viirt Blog

Skylight Questions… ANSWERED!

Skylights can completely transform a room. Flooding the space with natural light and adding new warmth and character, their functionality also allows for ventilation in small kitchens and bathrooms.


Skylights can complete transform the warmth and light of a room.

If you have already decided to install or replace a skylight, many decisions must still be made, in terms of size/types, installation, etc. Below are some of our most frequently asked questions on skylights, outlined to help you make your best buying decision!

  1. Will my skylight be prone to leaking?

While this is a valid concern, so long as you choose a quality material (we recommend Velux Skylights) and work with an experienced contractor, you shouldn’t have to worry about leaks. Please see FAQ 2 on the types of skylights, for a clearer picture of how leaking could occur.

  1. What is the difference between a Fixed and Vented skylight?

A fixed skylight will be leak proof, as they are sealed during manufacturing. The #1 cause of leaks with fixed skylights, in fact, is due to improper installation and poor flashing techniques. Be sure to work with a contractor that uses a flashing kit made for each curb size, wrapping all corners to seal. These skylights run around $300.


A fixed skylight will be leak proof if properly installed.

A vented skylight can present opportunities for leakage. Because they are not sealed shut, it is possible for them to be left open, allowing rain and debris into your home. If this is a concern, there are skylights available that will close automatically if they sense rain droplets. A vented skylight will allow moisture to escape from kitchen and bathrooms and run around $1500.


Vented skylights left open can pose a problem with rain and debris entering the home.

  1. Will the skylight provide warmth to the room?

The slope at which the skylight is positioned will affect the amount of heat your home is able to absorb. As a rule of thumb, the lower the slope, the more heat absorbed in the summer, and the less in the winter. Because this is typically the opposite of what homeowners want, we recommend the slope be set around 10 degrees over the geographical latitude of your location.

Kitchen in modern home with three skylights

The degree in which your skylights are installed MATTERS.

  1. How can I avoid improper installation/potential leaking?

Have your contractor install your skylight above the surface of the roof, with a minimum of a 2×6 inch curb, and be sure your contractor is using the appropriate flashing kit, to fit your skylight.

  1. Do I need to install my skylight in the summer?

While it is often preferred to install skylights with the weather dry, contractors can install your skylights nearly year round. In fact, you would likely be able to receive a discount on installation in the winter months!

  1. Should I be concerned with my skylight breaking or cracking?

Skylights are made with tempered (or laminated) glass, which could break. If you have large overhanging trees, a falling branch during a storm is a risk that you take.

  1. I am not sure where to place my skylight?

 Contact Viirt today, to set up a free consultation for a placement that best fits your home! | 360.718.7621