Getting Started
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Lay the aluminum out flat and use the tape measure and carpenter's square to mark a rectangle 24 by 18 inches.
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Use tin snips to cut along the lines.
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Use a hammer to bend down any rough or twisted edges left by the snips.
Attaching to the Post
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Using either a hammer and roofing nails or a drill with screw bit and sheet metal screws, securely fasten one 24-inch edge to the post. The 18-inch edge should be flush with the top of the post. Use five nails or screws evenly spaced, keeping metal flat and tight.
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Use a hammer and pliers to bend the metal at the first corner. Fasten the second side in the same way.
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Repeat step two for the remaining three corners. The metal should overlap approximately two to three inches. Fasten the end securely, avoiding driving nails or screws into your original fasteners.
