How to Attach a Porch Post to Concrete

Written by larry simmons
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How to Attach a Porch Post to Concrete
(Comstock Images/Comstock/Getty Images)

Whether you're adding a porch rail or an awning, attaching a post to your concrete porch slab requires a strong, steady anchor point. A post holder connected to your porch using lag bolts will provide that anchor point you need. Once attached, you can slip the post into the anchor, and then secure it in place. By using the holder, you'll anchor the post in such a way that it can resist even extreme weather conditions, remaining stable and upright as long as the wood of the post holds up under the force extended against it.

Skill level:

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Things you need

  • Porch post
  • Chalk
  • Post holder
  • Hammer drill
  • Concrete drill bit
  • Vacuum cleaner
  • Lag bolts
  • Washers
  • Socket wrench
  • 2-inch galvanised screws
  • Screwdriver

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  1. 1

    Place the post in position on the concrete and have a helper hold it upright. Mark the location of the post on the porch by outlining the base with a piece of chalk. Remove the post and set it aside.

  2. 2

    Use the chalk outline to position the post holder on the concrete. Make certain the walls of the holder align with the shape of the post mark on the porch. Hold the post holder in place with one hand and then mark the location of the bolt-holes in the base of the holder onto the concrete with the chalk. Remove the post holder.

  3. 3

    Attach a concrete drill bit to a hammer drill and then drill a hole at each bolt-hole mark for the lag bolts used to secure the post holder in place. Use a vacuum to remove any concrete dust left from the drilling process.

  4. 4

    Place the post holder onto the porch with the bolt-holes in the base aligned with the drilled holes in the porch. Slide a washer onto the lag bolt and then bolt the post down using a socket wrench to screw the bolt into each of the bolt-holes.

  5. 5

    Put the porch posts into the post holders. Secure the posts into place by either tightening the bolts on the sides of the holder, which closes the walls of the holder around the posts, or by screwing 2-inch galvanised screws through the screw holes in the sides of the holder directly into the sides of the posts.

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