How to Fix a Sagging Fence Gate

Gravity is the natural enemy of any gate, pulling the outer corner down until the latch no longer aligns with the strike plate. Over time, the weight of the gate puts immense pressure on the top hinge, causing it to tear out of the wooden post or simply shift. A gate that drags or refuses to latch isn't just an annoyance; it is a structural failure that will eventually compromise your entire fence line if ignored. Fixing a sagging gate requires a methodical approach that starts with the hardware and ends with structural reinforcement. You are looking for a firm, square connection between the gate frame and the post. When done well, the gate will swing freely with a consistent gap on both sides, latching smoothly without requiring you to lift or kick the gate into place.

  1. Inspect Every Fastener First. Inspect all screws on both the gate and the post-side hinges for looseness. Tighten every screw with a drill or screwdriver, replacing any that spin freely in their holes with new, slightly thicker galvanized screws.
  2. Bite Deeper Into Wood. If the hinges are pulling away from the wood, remove the existing screws and replace them with 3-inch or 4-inch structural wood screws. These will bite into the actual post structure rather than just the fence pickets.
  3. Lift With a Thin Shim. If tightening the screws doesn't raise the gate enough, place a thin metal shim or a piece of heavy-duty plastic behind the bottom hinge plate. This pushes the bottom of the gate out slightly, which effectively lifts the top outer corner.
  4. Brace the Frame Diagonally. Attach the turnbuckle cable assembly diagonally from the top hinge side to the bottom latch side. Gradually tighten the turnbuckle until the gate frame squares up and the latch aligns perfectly.
  5. Test the Latch Seal. Close the gate slowly to ensure the latch pin enters the strike plate without resistance. Adjust the strike plate position if necessary to account for the corrected angle of the gate.
  6. Seal Against Moisture. Touch up any exposed wood where hinges were moved or holes were filled with matching exterior-grade paint or stain. This prevents moisture from seeping into the hardware holes and causing rot.