If you’re installing an exterior mahogany door, we recommend an overhang that’s 4 to 6 feet deep—or at least half the height of the door. For example, a 96-inch tall door should have an overhang of at least 4 feet.
It’s also important to have a minimum of 24 inches of coverage on either side of the door unit to provide proper protection.
If your existing overhang doesn’t meet these guidelines, consider using a fiberglass door instead, as it offers better durability against constant exposure to the elements.