How to Mount a Mailbox on HardiPlank

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Things You'll Need

  • Drill

  • Masonry drill bit

  • Plastic anchors

  • Pencil

  • Level

  • Canned air

  • Air compressor

  • Screwdriver

Mounting a mailbox to Hardiplank only requires simple tools.
Image Credit: Jupiterimages/ Images

Many homeowners upgrade their outside panel siding to James Hardie's HardiPlank brand. This siding choice is made of fiber cement which is extremely durable and long lasting to weather the cold and hot seasons. However, some homeowners would also like to attach a mailbox to the HardiPlank surface. Specific tools and preparation will help make a mailbox mounting project look professional, as well as retaining the HardiPlank's structural integrity.

Step 1

Locate the area for the mailbox mounting. Hold the mailbox against the HardiPlank surface using your hands.

Step 2

Place a level tool on top of the mailbox while continuing to hold its position against the wall. Adjust the mailbox's position until the level tool indicates a perfectly level position.

Step 3

Make a mark with a pencil within each screw opening on the back of the mailbox to indicate the correct screw positions.

Step 4

Remove the mailbox from the wall. The marks should be clearly visible after removal.

Step 5

Create a drilled hole for each mark by using a drill outfitted with a masonry bit. The bit should be 1/4 inch in diameter.

Step 6

Remove the debris within the holes with canned air or an air compressor. Press a plastic anchor into each hole.

Step 7

Place the mailbox over the drilled holes. Screw in the screws with a screwdriver. Tighten the screws until the mailbox remains flush with the HardiPlank surface.


Alternatively, it is possible to use a power screwdriver to install the screws. However, do not overtighten the screws since the Hardiplank siding can become damaged with excessive pressure.


HardiPlank siding can produce harmful dust during drilling. HardiPlank suggests using a face mask to reduce the amount of dust exposure. Keep all children and animals away from the working area to prevent accidental inhalation.


Amy Rodriguez

Writing professionally since 2010, Amy Rodriguez cultivates successful cacti, succulents, bulbs, carnivorous plants and orchids at home. With an electronics degree and more than 10 years of experience, she applies her love of gadgets to the gardening world as she continues her education through college classes and gardening activities.