Christmas decorations are placed in many locations on the outside of a home. You might find them in the yard, along a sidewalk, in trees or up on the roof. It's the last option that is a little tricky. If you are so inclined as to install a decoration on your roof, your first thought should be for the safety of yourself and others. You need to secure the display at its base and top to ensure that is does not fall and hurt someone. And you must move slowly during installation, so that you do not get hurt.
Look at the base of the Christmas decoration. You need to be able to secure wire to it. If the base doesn't have any holes, hooks or other features you can wrap wire around, then cut a board to fit the length of the display. Use a circular saw to cut the wood. A 2-by-4 is best for large displays, and a 2-by-2 is fine for small, light-weight displays.
Drill 2- or 3-inch screws, depending on the thickness of the display, through the decoration and into the wood. Repeat with a board at the top of the display if it has nothing to attach wires to. Mount the board on the back of the display.
Screw eye bolts into the ends of the wood boards. When done, you should have four eye bolts, one in each end of the top board, and one in each end of the bottom board.
Feed wires through the eye bolts. Wrap the wire through the bolts several times and then secure it with the wire clamps. If you purchase a guy wire kit, it comes with the clamps. Otherwise, you can get them at a hardware store. You need two wires on each eye bolt. The length of the wires is dependent on the size of the roof. It is best to use one roll of wire for each connection. The wires will be secured at the corners of the house, and you won't know an exact length until you start to mount them.
Drill two small pilot holes in the front of the house just under the overhang or gutter. Place the two holes far from each other on either side of where the display will be standing on the roof. Place the holes at least 3 or 4 feet to each side of the future display. These are where the wires will be anchored, and it is best if the wires are stretched at an angle, away from the display. Screw eye bolts into the holes. Repeat the process in the back of the house.
Set up a ladder along the house and have someone hold it for you as you climb up. If you cannot carry the display up with you, attach a rope around it and bring the other end of the rope up with you. When you get to the roof and position yourself securely, hoist the display up.
Move the display to the location where you want it. Lay it down so that the base is in the right position. It is best if you have someone else come up to help you with this.
Take the four wires attached to the base eye bolts and move them to the front and back of the house. One wire on each side of the display needs to go to the front, and the other two go to the back.
Attach the wires to the house eyebolts. Have someone help you with the wires, and attach one side of the display at the same time. Repeat with the other side, and pull the wires tight. This will stretch them out, and stretch out the wires on the other side as well.
Finish the display with the top wires. Stand the decoration upright, and take the two wires on one side. With help, run the wires to the front and back eyebolts on one side, and then repeat with the other wires on the opposite side of the display.