Install header joists perpendicular to the rest of the joists Figure 1. Using a utility knife and a straightedge, cut the roof shingles about 3 inches back from the opening on all four sides. Set the skylight in place, centered on the opening, and attach it to the roof with nails or screws.
Cut strips of roofing paper about 8 inches wide and slip them under the shingles Figure 2. Install the bottom piece, then the sides, and then the top.
The idea here is to overlap the pieces down-roof with the pieces that are up-roof so water will shed properly. Sneaking the paper under the shingles will be tricky. Use a flat pry bar to lift all the roofing nails that would get in the way, taking care not to damage the shingles.
Install the bottom flashing, a single piece that wraps partway around the skylight and sits on top of the roof shingles Figure 3. Drive roofing or flashing nails horizontally into the skylight, not vertically into the roof.
Next, slip individual pieces of step flashing under the shingles. On each side, start at the bottom and work up. The step flashing pieces must overlap each other by 4 inches or so. Attach the flashing pieces to the skylight, not to the roof. These pieces are designed to fit tightly onto the skylight and ensure that water cannot enter between the step flashing and the skylight. Attach the bottom piece first and then the side pieces Figure 4.
Install the top piece called the head flashing by slipping it under the roofing and attaching it to the skylight. Don Vandervort writes or edits every article at HomeTips. HomeTips articles may contain links to Amazon. In This Article:. Tagged skylight skylights. Affiliate Disclosure HomeTips articles may contain links to Amazon. Last Updated: September 28, References. This article was co-authored by Ryaan Tuttle.
With over 15 years of experience, Ryaan specializes in home improvement and property maintenance by leveraging technology and craftsmanship. Unlike most handyman contractors, Best Handyman Boston is licensed and insured.
Boston Magazine and LocalBest. This article has been viewed 46, times. Skylights offer a way to bring more natural light into a room and help it feel more spacious. They can also help keep a house cooler by allowing hot air to escape. Most skylights are installed in an attic or ceiling, and by following a few steps you will be on your way to having a house with a skylight.
To install a skylight, start by cutting a hole through the roof and ceiling from the outside that's large enough to hold the skylight. Next, drive 4 deck screws through the roof from the inside to hold the skylight in place. Then, lay sheathing around the hole to prevent water leakages before inserting the skylight. Afterwards, screw in the metal brackets that are on the frame to secure it into the roof. Finish by stapling roofing felt around the skylight for extra protection against leaks.
For tips on how to make a window frame for the inside of the skylight, keep reading! Did this summary help you? Yes No. Log in Social login does not work in incognito and private browsers. Please log in with your username or email to continue.
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Part 1. Measure the slope, or pitch, of your roof. Most skylights are manufactured with specific roof pitches in mind. It is important to measure the pitch of your roof before purchasing your skylight. Use a level with a ruler on the side to measure the roof run and height to calculate the pitch of your roof. From the side of the house measure from the corner along the wall 12 inches Make sure that this line is level using the bubble on your level.
Then use a tape measure to measure the distance between the mark and the underside of the roof. Your roof ratio will be this vertical length divided by 12 for 12 inches. Some skylights are also designed specifically for use on corrugated metal roofs. Mark the location for the skylight from the inside. While inside your house mark the location of choice in the wall. Use a hammer to make a small hole in the ceiling in the chosen location.
This way you can check if there is any special plumbing or electrical wires at this location. If there is anything in the way, it is usually easier to simply choose a new place for the skylight. Otherwise, it is possible to re-route plumbing and wires around the location. The opening should fit in between 2 rafters to prevent structural damage.
If you are installing a skylight on a corrugated metal roof then it should be positioned just below the lap of the roofing and aligned with the grooves on the skylight fins. Cut through the ceiling from inside.
If you have significant space between the ceiling and roof or have an attic to push through then you will have to cut the ceiling from the inside. Otherwise you should be able to make one cut from the top of the roof through all the layers.
Remove any drywall and insulation you cut through. Drive four screws from the inside through the roof. After you make sure there is no plumbing or wires in the way and cut a hole in the ceiling you should drive four deck screws through the roof at each corner.
Go up to the roof and remove shingles from the area. Strip the shingles from the rectangle plus at least 7 inches 18 cm on each side. Mark the sides of your skylight and make the cuts. Use chalk line between each of the four screws to mark a rectangle where you will cut through the roof. Use a circular saw to cut through three of the sides of your rectangle. Be careful not to put weight on the cutout. These roof cuts are not reversible so make sure they are accurate.
If making cuts on a corrugated metal roof you will need a special blade to cut metal. Cut through the fourth edge of your cutout. Have someone hold the cutout up from the inside while you make the fourth cut. This prevents the cutout from falling and damaging your floor or furniture. Part 2. Prepare the opening. There are two types of skylight: those that have a frame in place and those that are mounted on a curb.
For those that have a frame in place, the sheathing is a layer that will fit beneath your skylight to help prevent water leaks. For curb-mounted skylights you will need to secure two by sixes 5 cm by 15 cm along the edges of the opening.
To attach the sheathing for frame in place skylights, nail it down around the perimeter of the opening on top of the roof.
Then attach a strip of self-adhesive membrane along the bottom edge of the opening. One inch 2. To create the curb for curb-mounted skylights you must measure the sides of the opening and cut four 2x6s 5 cm by 15 cm to fit along the upper edges. Nail the four pieces together into the shape of a rectangle.
Make sure this box is square and then toenail it into place around the roof opening. Toenailing involves driving the nails in at an angle to securely attach the curb to the roof.
Pass the skylight's frame through the rough opening to get it onto the roof. Ask someone to hold the frame from the inside of the opening and bring it through the opening onto the roof.
This way the skylight is secure and reduces the chance of dropping it or causing damage to the window. Be careful when working with the skylight at this point so that you do not damage it.
Lower the skylight into place. Rest the skylight against the bottom edge of the opening first and then lower the light onto the roof. If the skylight is curb-mounted then you will need to lift window over the curbs and rest it on top of the sills.
Skylights for corrugated metal must be slid under the upper flap of the roof. To slide it under the top flap of roof you will need to make two cuts in the roofing so that the skylight can be slid into location.
This protects the roof from water leakage. Secure the skylight to the roof. Put 2-inch 5 cm screws through the metal brackets on the frame's sides. Drive the screws through the skylight's neighboring rafters for frame in place skylights. Curb-mounted skylights will be attached directly to the curb. Part 3.
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