How to Attach a Mailbox to a Porch Railing


Mailbox fashions are popular today. Homeowners choose between decorative copper, wood and figural mailboxes to enhance the appearance of their porch railings. It is easy to attach a wood or metal mailbox to a porch railing with small "L" brackets and a card of two-part JB welding glue. When mailboxes are mounted in this manner, they are easy to remove as exterior fashions change.

Things You'll Need

  • Wood or metal mailbox
  • Four "L" brackets in size: 1-inch, 1-hole
  • Four 1-inch wood screws to fit "L" bracket holes
  • JB two-part welding glue
  • Pencil
  • Screwdriver
  • Place your mailbox in the desired location on the porch railing. Pencil a line onto the railing at the front and back of your mailbox. Put the mailbox aside.

  • Position the "L" brackets along the sides of your porch railing in a way that will support the bottom of the mailbox on the top of each bracket. Mark the "L" bracket screw-hole locations with a pencil. Set the brackets aside.

  • Screw each "L" bracket into the sides of your porch railing while using the screw-hole marks as a guide.

  • Mix the two-part JB welding glue according to package directions. Dab the welding glue on top of the "L" brackets. Place mailbox on top of the "L" bracket supports.

  • Open the door to the mailbox. Fill the mailbox interior with bricks or other heavy items to help the glue to set in a very firm manner.

  • Remove the bricks or heavy objects from the mailbox after 24 hours.

  • Remove the mailbox from the porch railing by unscrewing the "L" brackets when it is time to install a new mailbox.

Tips & Warnings

  • Round railings: Glue "L" brackets onto the bottom of the mailbox first. Use the "L" bracket holes to wire the mailbox into place.
  • Use a JB brand of welding glue to withstand temperature variations.
  • Do not bump the mailbox while it is drying into place.

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  • Photo Credit Boite aux lettres canadienne ouverte image by GUILLIN from
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