How to Fix a Sagging Fence Gate

GATES are the workhorses of your property line, but constant use and gravity inevitably lead to sagging. A gate that drags on the ground or refuses to latch is more than just a nuisance; it puts unnecessary strain on your gate posts and eventually warps the frame beyond simple repair. Getting it back in line usually comes down to addressing the hinge points or providing the structural diagonal support the gate frame lost over the years. Done well, a repaired gate swings silently, latches firmly, and sits square within the opening with a consistent gap on all sides. You are aiming for a setup where the weight of the gate is properly transferred to the hinge post rather than hanging on the latch. This isn't a complex rebuild; it is a methodical tightening and bracing process that restores the geometry of the structure.

  1. Tighten All Hinge Bolts. Examine the lag bolts or carriage bolts securing the hinges to the gate and the post. Tighten any that have backed out, and if the holes are stripped, replace the bolts with a larger diameter fastener.
  2. Restore Gate Verticality. If the gate is sagging because the wood around the hinges is compressed, remove the hinge and place a thin metal shim or a piece of heavy-duty plastic behind the hinge plate. Reinstall the hinge to force it back into a plumb position.
  3. Deploy the Diagonal Cable. Mount the corner brackets of the anti-sag wire kit: one at the top hinge side and one at the bottom latch side. Thread the steel cable through both and tighten the turnbuckle until the gate lifts enough to clear the ground.
  4. Match Latch to Gate. Once the gate is lifted and level, adjust your latch receiver on the post to match the new height. Secure it with new screws if the old ones have pulled out due to the previous sag.
  5. Smooth the Hinges. Apply a silicone-based lubricant to the hinge pins to ensure smooth operation. Wipe away any excess to prevent dirt buildup.
  6. Weatherproof New Holes. If you drilled new holes or widened old ones, coat the exposed wood with a weather-resistant exterior sealant or paint to prevent water rot. This prevents the wood from softening again and causing another sag.