Gates can be notorious for sagging over time, especially if they are large and heavy.

In this DIY post we’ll show you a reasonably quick, easy and cost effective solution to correct gate sag and hopefully prevent it from happening again in the future.

Inventory and measure up


Tools and Equipment

  • Wire Cutters/Swaging Tool
  • Drill Driver
  • 4mm Drill Bit to suit chosen Fasteners and material your drilling into (ie. timber, metal etc.)
  • Adjustable Spanner
  • Safety Goggles
  • Pencil or Texta for marking holes
  • Stainless Steel or Galvanised wire rope
  • Balustrading Kit to suit gate frame (ie. Metal or Wood etc.)
  • 4 x Stainless steel or galvanised M4 bolts and nuts and washers

Please note: For maximum strength we will be using bolts and nuts (M4) in this demonstration. You can also fix the wire eye straps with other appropriate fixings such as rivets or self-tapping screws for metal frames or appropriate length timber screws for a timber frame.


  1. Position the wire eye strap in the upper corner (hinge side (inside) of the gate and mark / screw holes. Place the other wire eye strap on the lower corner (opposite (inside) and mark / screw holes.
  2. Drill 4mm holes through both sides of the gate frame at corners marked.
  3. Take end of the wire rope, run it through the swage, around thimble, back through the swage and clamp it with a swaging tool.
  4. Now that you’ve created a loop, place the wire eye strap through the loop and using the appropriate length M4 stainless steel bolts and nuts, attach to bottom corner of gate frame.
  5. Bolt remaining wire eye strap to inside top corner of the gate frame.
  6. Fully extend the turnbuckle. Take remaining thimble and place through the turnbuckle eye (may require a flat head screwdriver to pry open a little).
  7. Place turnbuckle hook through wire eye strap in top corner. Reel off wire rope at least 100mm past the turnbuckle eye and cut the wire rope. Place swage over the wire rope, run the wire around the thimble and back through the swage. Pull wire rope tight around thimble and clamp swage with swaging tool. Cut off excess wire rope.
  8. Tension the turnbuckle till you get your desired result (ie. the gate straightens up).


The end result is a gate that no longer sags, functions better and can be tightened from time to time as required to maintain the tension of the wire rope.

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