Things You'll Need:
- Roofing screws
- Electric drive fastener
- Correctly sized socket for roofing screw
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Step 1
Observe the construction of the roofing screw. Note that the end of the screw is shaped and operates like its own drill bit. All roofing screws have this feature and are called self-tapping or self-drilling screws. Just below the colored head, which should match the metal roof, is a large metal washer. Below that is a thick rubber grommet or rubber seal. If for some reason the screws do not have a metal washer or rubber seal, do not install these screws. Without the metal and rubber sealant system, the screw will cause the roof to leak.
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Step 2
Install the correctly sized socket driver into the chuck of the electric drive fastener or drill. These sockets are often magnetized to hold the head of the metal screw in place while driving it through the metal roof and into the wooden framing member below.
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Step 3
Install the roofing screws though the high ridges or on top of the corrugations only. This allows the water to run off and down the lower portions of the roof system. Installing a roofing screw in a lower portion of the metal roof may cause a leak in heavy rains, regardless of the rubber seal.
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Step 4
Start the screw by pressing the drill bit end firmly against the metal roof, typically above the wooden roof framing. Press the drill button and slowly begin the rotation of the roof screw. As the metal begins to "drill" out the roof material, speed the drill up until the screw penetrates the metal. Keep advancing the screw until the metal washer seats firmly against the metal roof and the rubber seal squeezes slightly from under all sides of the metal washer.
