How to Enlarge Door Openings on a Metal Shed

Take down the existing metal shed’s door before determining the replacement door’s dimensions. Use the new door's dimensions to draw an outline for the larger opening with a permanent marker.

Slip on a pair of work gloves and safety goggles before drilling two holes, one in each of the outline’s top corners, with a pneumatic drill. The size of the hole must accommodate the reciprocating saw’s metal blades. According to Popular Mechanics, the most efficient way to create a larger hole is to first drill a pilot hole with a smaller drill bit. Continue to increase the drill bit’s size until you've created a large enough hole to accommodate the reciprocating saw’s metal blades.

Load a reciprocating saw with metal-cutting blades. Choose metal-cutting blades that feature either 14 or 18 teeth per inch. These are strong enough to cut through the thicker metal shed walls.

Starting at either corner, cut through either of the vertical permanent marker lines on the metal shed with the reciprocating saw. Continue on to the other vertical permanent marker line before joining the two cuts by sawing through the horizontal line.

Remove the cut metal piece and install the replacement door according to the package directions.