FIELD NOTES // MAINTENANCE
To fix a sagging gate, first find what moved: the supporting post, the hinge attachments, the gate frame or the latch. Secure sound attachments and use the correct adjustment for the identified hardware. A damaged frame or unstable post needs repair before fine adjustment. Moving the latch alone can leave the original problem in place.
By Get Your Fence On · SEPTEMBER 12, 2026 · 5 MIN READ
Start with the symptom you can see. The latch may miss its receiver, the free corner may drag, or the gap beside the latch post may widen toward the top. Photograph the whole opening and both hinges before changing anything. A close-up of the latch alone leaves out much of the system supporting it.
Check only from a safe position. Keep hands away from hinge gaps and don't lift, force or remove a heavy or unstable gate. If a post rocks, an attachment is pulling out, or the gate could fall, restrict access and arrange an appropriate professional assessment before attempting an adjustment.
Use a level on two adjacent faces of the hinge post to check whether it stands plumb . Compare the hinge-side and latch-side gaps without pulling the gate into position. A gate can be square within its own frame and still hang incorrectly when its supporting post leans. Note visible splits, damaged connections and changes around the footing.
The Adjust-A-Gate AG36/AG60 instructions specifically call for straight posts and rails, explaining that bowed or crooked lumber can cause misalignment. That's a useful check before buying another hinge: establish whether the support and framing are sound enough to hold the adjustment you intend to make.
Sources: Jewett Cameron: AG36/AG60 installation instructions
Inspect the hinge-to-post and hinge-to-gate connections, then the frame corners and rail joints. A loose screw, a torn fixing hole and a cracked rail need different responses. Tightening hardware is useful only when the fastener and the material holding it are sound. Don't substitute a larger screw or move a hinge into damaged wood without checking the repair detail.
On a rectangular frame, compare the two corner-to-corner measurements using the same points. Unequal diagonals can flag distortion; confirm against the frame's intended shape and specifications. Jewett Cameron's maintenance guidance calls for checking loose hardware and adjusting its gate frame and truss cable as needed. Those are separate checks, even when the symptom is the same dragging corner.
Sources: Jewett Cameron: gate maintenance and product FAQ
Find the manufacturer's name and model before turning an adjustment screw. Some hinges adjust gate position; others mainly adjust closing tension. D&D's TruClose MULTI-ADJUST Heavy Duty Series 3, for example, provides horizontal, vertical and tension adjustments for its stated vinyl / composite applications. That doesn't mean a different hinge has the same controls or permitted adjustment range.
Follow the instructions for your exact model, including its support and fastener requirements. D&D directs adjustment questions to those instructions and states that its gate-weight ratings apply to a pair of hinges. It also warns that adding extra hinges can create binding when alignment is compromised. Adding another hinge is therefore not a universal cure for sag.
Sources: D&D: TruClose MULTI-ADJUST Heavy Duty Series 3 · D&D: hinge adjustment and weight-rating FAQ
A compatible anti-sag cable can adjust a gate frame, but it can't repair a damaged supporting post. Identify the frame and kit first. The AG36/AG60 diagram places its cable between the upper hinge-side corner and the lower latch-side corner; its turnbuckle provides fine adjustment. Use that diagram for those models, with the specified attachments and assembly details.
Work within the kit's instructions and reassess the gate after each permitted adjustment. Stop if an attachment shifts, wood splits, or the supporting post starts moving. A cable system, a timber brace and a welded frame have different construction details. Copying the appearance of a diagonal from an unrelated gate isn't enough to choose a repair.
Sources: Jewett Cameron: AG36/AG60 cable and latch diagram
After a sound gate has been adjusted, open it through its normal travel and close it repeatedly. Check ground clearance, hinge binding, the latch meeting its receiver and operation from the sides where it is intended to work. Adjust the latch only after the gate hangs and moves correctly. It should operate without someone lifting the free corner into place.
A pool gate needs its safety function checked as well as its alignment. CPSC's Pool Safely guidance calls for access through a gate that closes and latches itself. If that function fails, treat the barrier as unsecured and prevent children's access while it is repaired. Follow the applicable local requirements ; a successful latch test alone does not establish pool-code compliance.
Sources: CPSC Pool Safely: barriers and gate safety
For a Missouri or Kansas property, record whether the problem followed a storm, a change in ground level or work beside the fence. Photos taken from the same position help show a change. That history can guide an inspection, but it doesn't prove what happened underground or establish a repair depth.
If the proposed repair reaches the post footing, review utility locating, private lines and any applicable local approval before excavation. The linked before-we-dig guide explains that planning step. Measure the actual opening and the gate's swing clearance so an assessment includes the post, the gate and the space it needs to move.
Adjustment makes sense when the supporting parts are sound and the hardware provides the required movement. Component repair or replacement deserves consideration when a frame is damaged, an attachment cannot hold or a post is unstable. Ask for the assessment to identify the failed part and explain how the proposed work restores support, alignment and normal operation.
Keep the hardware model, photographs, opening measurements and any existing warranty documents together. If you're comparing a larger fence replacement, include the number and purpose of each gate in the project details. A walk gate, mower opening and double driveway entrance create different requirements, so the gate should be part of the estimate from the start.
Plan before any post excavation
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