How to Attach Railing Posts on a Flat Roof

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Using an existing garage roof as a location to build a new deck is a convenient outdoor remodeling project that can add functionality and landscaping appeal to your outdoor living space. You might be tempted, when converting your garage roof to a deck, to tie railing posts to the outside frame of the roof; however, this method will craft an unstable railing. Instead, tie the posts into the roof rafters for a stable railing that is safe and will withstand weather and use.

Things You'll Need

  • Pencil
  • Post brackets
  • Drill
  • Epoxy paste
  • Bolts
  • Nuts
  • Wrench
  • Check local building codes, and get any required permits for constructing deck railings. Codes vary, but few municipalities will be without a required height for a rail at the edge of decking, as well as any spacing requirements between posts.

  • Remove ceiling panels from under the roof, exposing the rafters. Place the roof post bracket at each designated spot along the rafters and mark the mounting holes with a pencil.

  • Drill up through the rafter to the roof above at the marked spots, creating holes for pass-through nuts and bolts.

  • Go to the roof. Position the post in place with the bracket aligned to the holes. Line the bolt with epoxy paste, then thread the bolt through the holes.

  • Tighten each bolts from underneath with a nut, securing each one in place with a wrench.

  • Repeat for every post required to install the roof railing.

  • Replace the ceiling panels when the installation is complete.

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References

  • Photo Credit Thinkstock/Comstock/Getty Images
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