How to Install Skylights on Metal Roofing


Many houses have skylights on the roof to allow more light to come into the house. Skylights make rooms feel larger and allow a lot of sun to come into the house. There are a few different types of skylights including tubular and rectangular. They can also come operating or fixed. Skylights can help with energy costs and, when opened, allow the heat to leave the house. Installing a skylight is a difficult task, but can be completed by a do-it-yourself homeowner.

Things You'll Need

  • Angle brackets
  • 2 by-4-inch pine boards
  • Roofing nails
  • Galvanized nails
  • Circular saw
  • Hammer
  • Pry bar
  • Utility knife
  • Snips
  • Cut the opening for the skylight. Start inside the house and drill a small hole where the center of the skylight will be. Then get on top of the roof and use a circular saw to cut out the opening for the skylight. Make sure the circular saw blade is appropriate for metal.

  • Make a frame with 2-by-4s. Use angle brackets to keep them in place. Place the skylight on top of the finished frame. Attach it with roofing nails. Make sure it lines up evenly and there is about 1 inch of room on each side of the 2-by-4. Then make another frame that is the same size as the inside measurements and install inside the house in the cutout hole with sheet metal screws.

  • Put rubber window seal tape all around the opening on the outside of the roof. This will help seal the whole outside of the roof to prevent leakage. Press down on the frame to make sure it is properly sealed.

  • Screw the top frame down to the inside frame with deck screws and caulk all around the frame to make sure it is properly sealed. Place rubber tape on the inside of the skylight, then press down on the frame of the roof. Screw into the frame of the skylight to ensure proper installation. Caulk around any openings that remain to completely seal the window.

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  • Photo Credit skylight image by Scott Williams from
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