How to Install Velux Skylights

Velux skylights are used to help bring light into rooms in homes where the sun does not shine as much.

There are many different types of Velux skylights, including fixed and venting. Whether they open or not, installation on them will be the same. Finding the proper location to install your Velux skylight is the first and most important step in the installation process.

Inspect the roof to determine where the skylight will be installed and measure the size of the skylight. Go inside and find a location where each edge of the skylight will be bordered by roof rafter. Hammer a nail in each corner from the inside so they can be found on the roof. Mark a square with a chalk line on the roof to signify where the light will be installed.

Remove all shingles and underlayment with a shingle stripper. Cut out the opening with a circular saw. Cut carefully to make sure the proper cut has been made.

Cut a 2-by-4 to the size of the width of the opening and screw it into place across the top of the opening. Repeat the process for the bottom to allow the skylight a header to install onto.

Set the skylight into the opening and screw it in place into by screwing it to the header that was installed, inserting a screw every six inches around the entire perimeter.

Roll flashing around the perimeter of the skylight and nail it in place with roofing nails. Inspect the area to make sure everything has been properly sealed and no gaps or cracks are visible.

Things You Will Need

  • Circular saw
  • Safety goggles
  • Ladder
  • Hammer
  • Roofing nails
  • Drill
  • Screws
  • 2-by-4 lumber


  • Always wear safety goggles when working with a circular saw or any other type of saw to prevent eye injuries.
  • Be very careful when using a ladder on a roof. Make sure it is on steady and stable ground when in use.

About the Author

Alexander Callos began writing in 2005 for "The Lantern" at The Ohio State University and has written for various websites, including Bleacher Report, Top Ten Real Estate Deals and Columbus Sports. He has published articles for CBS Sports, and other websites. He graduated in 2007 from The Ohio State University with a bachelor's degree in public affairs journalism.