Fence Gate Sagging or Won’t Latch? Fix the Hinge and Post Problem First
A fence gate that drags on the ground or misses its latch is usually losing support at the hinges, the gate frame, or the latch-side post. Start by deciding which part moved: a loose hinge can let the gate drop, while a leaning or rotten post changes the opening itself. Do not force the latch or tighten hardware while the full gate weight hangs on it. Brace the gate first with a block or helper, then inspect the hinges, screws, and diagonal frame members. A simple hinge adjustment can be a manageable repair, but a loose post, hidden rot, masonry anchor failure, or an automated gate needs a more substantial repair. Keep children and pets away from a gate that can swing or fall unexpectedly. Note whether the gap at the top and bottom changes as you lift the latch-side corner. A gap that changes together usually points to the entire gate sagging; a gap that stays uneven along the opening can point to a shifted post or ground movement. This distinction prevents you from adjusting the latch repeatedly when the support structure is the actual problem.
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Common Symptoms
- The gate drags on soil, pavers, or a threshold
- The latch misses its strike or only closes when lifted
- Hinges wobble, screws spin, or bolts are missing
- The latch-side or hinge-side post leans, cracks, or feels soft
- The gate frame is racked, twisted, or visibly sagging at one corner
Most Likely Causes
- 1
Loose or Corroded Hinge Hardware
Hinge screws, lag bolts, and straps can loosen with repeated use, weather exposure, and gate movement.
- 2
Settling or Rotten Fence Post
A post that moves at the ground, leans after rain, or has soft wood near its base cannot hold the gate square.
- 3
Gate Frame Racking
A rectangular wood gate needs a rigid diagonal brace or cable arrangement. Without it, the latch-side corner drops under its own weight.
- 4
Ground or Threshold Movement
Frost heave, pavers, soil buildup, or a shifted threshold can make a previously square gate drag even when the hinges are sound.
- 5
Latch Alignment Changed
The latch and strike can shift after hinge work or post movement, so align them only after the gate swings squarely.
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Quick DIY Checks
Support the gate before loosening hinge hardware. A heavy gate can swing, fall, or pinch hands and feet.
Do not repair a powered, self-closing, or automated gate unless its power is locked out and the work is performed by a qualified gate technician.
Stop for rotten posts, cracked masonry, or a gate that could fall into a public path; those conditions need structural repair before normal use.
- 1Support the closed gate on a solid block or have a helper hold it before touching hinges. Mark the current hinge and latch positions with painter’s tape or a pencil.
- 2Check hinge screws, bolts, and straps for looseness or corrosion. Tighten only sound hardware into solid material; replace stripped screws with appropriately sized exterior-rated fasteners rather than oversized improvised hardware.
- 3Open the gate slowly and check whether either post moves at the ground. Stop if a post is loose, split, rotten, or set in damaged masonry—post replacement is the real repair.
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Repair vs Replace
Sound posts and a square frame often need only hardware adjustment. Replace or professionally rebuild the assembly when post rot, major racking, or damaged anchors compromise support.
Est. Repair Cost
$15–$120 for hinges, fasteners, a latch, or a brace
Est. Replacement Cost
$250–$1,500+ for a new gate and post work
Recommended Tools & Parts
- Buy on Amazon →
Exterior-rated gate hinge set
Match the hinge type, weight rating, and mounting pattern to the existing gate; galvanized or stainless hardware resists outdoor corrosion.
$20–$70
- Buy on Amazon →
Gate diagonal brace kit
Use a kit sized for the gate frame and install it only after confirming the hinge post and latch post are stable.
$15–$45
Links are Amazon affiliate links (tag: fixitfastai-20). Prices are estimates.
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Related Repair Guides
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Read guide →Wood Rot Repair on Exterior Trim or Siding
Soft or crumbling exterior trim or siding? Probe the damage, remove rot, harden remaining wood, fill with epoxy, then prime and paint.
Read guide →Keep Exploring
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Frequently Asked Questions
- Should I move the latch to make a sagging gate close?
- Only after correcting the sag. Moving the latch alone can hide a failing hinge, frame, or post and makes the next adjustment harder.
- Why does my gate sag again after I tighten the hinges?
- The hinge screws may be stripped, the frame may lack bracing, or the supporting post may be moving. Check the structure rather than repeatedly tightening the same hardware.