Installation Process

Expert installation made easy.

VELUX® skylight systems and Sun Tunnel® Skylights can be installed in flat or vaulted ceilings in two worry-free phases: rooftop and interior. The pros at Windy City Skylights will recommend where skylight systems should be installed, so you can reap the maximum benefit from the natural light and fresh air they provide.

Installation Types

The Room

VELUX-trained pros will come inside for interior finish work and possible painting. If you have a flat ceiling, your installer will use drywall or other finish material to build a shaft from the skylight to direct the daylight into the room. This phase takes around half a day per skylight.

The Rooftop

VELUX-trained pros will cut a hole and fasten the VELUX skylight to the roof with three layers of protection to prevent leaks. Depending on the circumstances such as roof pitch and weather, the rooftop phase can take between one and three days.
2-3+ Days Total*

The Room

VELUX-trained pros will cut a hole in the ceiling to install the lower portion of the reflective tube between the roof and ceiling.

The Rooftop

VELUX-trained pros will cut a hole in the roof and install the top collar, the upper portion of the reflective tunnel, the lens and the flashing.
2 Hours*

The Room

There may be a small amount of interior drywall work depending on your replacement situation, but the majority of the replacement process will take place on the roof.

The Rooftop

VELUX-trained pros will get measurements from your existing skylights to ensure your replacements are a perfect fit, then they’ll replace your skylights
1 Day Total*

*Time estimates are based on averages. Project duration varies based on its complexity.

Get a Quote

Call us at 630-318-2076 or fill out the form to start your quote today.

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  • Gregg Schwartz
    Windy City Skylights said what needed to be done and they did exactly what they said, on time and on budget. Finished work was top shelf.
  • Steve Lenz
    3 skylights replaced in one day - no mess!
  • Tom Lewis
    We just had our 2 Velux skylights replaced in our 4 seasons room. The new product even has built in solar power shades. Dealing with Windy City Skylights is very easy, from start to finish the process is quick. The company representative, Cody Price explained everything in detail, including the ability to pick out our own install date. Ari was the installer and he was very efficient and left our room spotless after completion. Thank you Ari. The office staff (Mindy) also very helpful.. Look no further if you need skylights replace, Windy City Skylights is the place to go. :-)