# Why is my fence gate sagging? > Why fence gates sag in Johns Creek yards: hinge posts that lean, missing braces, loose hinges and wet clay. How to check which one it is and how each is fixed. URL: https://uprightjohnscreekfencing.com/guide/sagging-gate/ Learn Usually because the hinge post is leaning or the gate frame is racking out of square. Loose hinge screws come third. Each has a different fix. Last Updated: November 5, 2026 Usually for one of three reasons. The hinge post is leaning toward the opening, because it was set too shallow or its base has rotted. The gate frame is racking out of square, because it has no brace or the brace runs the wrong way. Or the hinges have loosened, because their screws have pulled out of the wood. A quick check tells you which, and each has a different fix. [Upright Johns Creek Fencing](https://uprightjohnscreekfencing.com/) repairs and builds [gates](https://uprightjohnscreekfencing.com/gate-installation/) across north Fulton, and sagging is the most common gate call. This guide explains how to diagnose it. ## How to tell which problem you have Close the gate and look at three things: 1. **The hinge post.** Hold a level against it. If it leans toward the opening, the post is the problem. Push on it; if it rocks, the footing has failed. 2. **The gate itself.** Measure both diagonals of the gate frame, corner to corner. If they differ, the gate has racked out of square. 3. **The hinges.** Lift the latch end of the gate. If the hinges shift or their screws move, they are loose. More than one can be true at once. A loose hinge lets the gate drop, which loads the post harder, which leans it further. ## A leaning hinge post A gate hangs its full weight off one side of its hinge post, like a lever. Every swing and slam adds to that. Over time, a post set too shallow, in soft soil or without enough concrete tilts toward the opening and the latch side of the gate drops. On north Fulton’s clay soils, wet ground makes this worse; a post that holds in a dry summer can lean after a wet winter. Wood posts can also rot at the soil line, which lets them bend there even when the concrete is solid. The fix is to reset or replace the post: dig it out, set a new one larger and deeper, on a gravel base, with concrete crowned to shed water. A steel post is often the better choice for a heavy or wide gate. The [leaning post guide](https://uprightjohnscreekfencing.com/guide/leaning-fence-post/) covers the options, and the [post depth guide](https://uprightjohnscreekfencing.com/guide/how-deep-should-fence-posts-be/) explains why gate posts go deeper. ## A gate racking out of square A wood gate is a rectangle, and rectangles want to become parallelograms when weight pulls on one corner. A diagonal brace stops that. On a wood gate, the brace runs from the bottom corner on the hinge side up to the top corner on the latch side, so it pushes the latch corner up. A brace installed the other way does nothing to stop the sag. Gates without a brace, gates with the brace backward and gates whose brace has come loose all rack. The fix is to square the gate and add or correct the brace. A steel gate frame, which wood boards are fastened to, holds square much better on wide or heavy gates. ## Anti-sag kits An anti-sag kit is a steel cable with a turnbuckle, run diagonally from the top corner on the hinge side to the bottom corner on the latch side. Tightening the turnbuckle pulls the latch corner up. It works well on a gate that has racked, if the hinge post is sound. On a leaning post, it only hides the problem. ## Loose or undersized hinges Hinge screws pull out of wood as the gate works them back and forth. Longer screws, through-bolts or carriage bolts hold better. Light hinges on a heavy gate bend over time. Heavy strap or tee hinges rated for the gate’s weight, set with bolts through the post, last much longer. ## Gate width and weight Wider and heavier gates sag sooner. Board-on-board gates are heavy because they carry two layers of boards; the [board-on-board vs shadowbox guide](https://uprightjohnscreekfencing.com/guide/board-on-board-vs-shadowbox/) covers that tradeoff. Wide openings are often split into a pair of gates, so each one hangs less weight. Driveway gates are usually built in metal, and wide drives may suit a sliding gate instead of swinging ones; the [swing vs sliding gate guide](https://uprightjohnscreekfencing.com/guide/swing-vs-sliding-gate/) compares them. ## Metal and vinyl gates Aluminum gates rarely rack, because the frame is welded, but their hinge posts can still lean. Vinyl gates need a metal insert frame or they sag; a vinyl gate without one is a common problem. Chain link gates sag when the hinge post leans or the hinges slip on the post. ## Latches and dogs A sagging gate stops short of its latch and swings open in the wind, which is how many dogs get out. Self-closing hinges and a gravity latch only work if the gate is square and level. The [dog fence guide](https://uprightjohnscreekfencing.com/guide/best-fence-for-dogs/) covers gates for dogs. ## When to repair and when to rebuild Tightening hinges or adding an anti-sag kit is a small repair. Resetting a hinge post is a bigger one but still far less than a new gate. If the gate boards are rotted and the post is failing, building a new gate on a new post often makes more sense. If the whole fence is leaning, the [repair or replace guide](https://uprightjohnscreekfencing.com/guide/repair-or-replace-fence/) helps decide. [Fence repair](https://uprightjohnscreekfencing.com/fence-repair/) covers the work, and questions about a specific gate can go to the number at the top of the page or the form below. ## Questions about this guide ### Can an anti-sag kit fix a sagging wood gate? Often, if the hinge post is sound. The kit's cable and turnbuckle pull the latch side back up. If the hinge post is leaning, the kit only hides the problem until the post moves further. ### Which way should the brace go on a wood gate? A wood brace runs from the bottom of the hinge side up to the top of the latch side, so it pushes the latch corner up. A cable runs the opposite way, from the top of the hinge side to the bottom of the latch side. ### Should a gate be wider than the fence opening calls for? A gate should be wide enough for what passes through it, but wider gates sag more. Openings past about 5 or 6 feet are often split into a double gate. Want this answered for your own yard? A site visit shows what the line, the slope and the rules mean for your fence. Call (678) 509-2926 ## More guides Learn How do you fix a leaning fence post? Find out why it leans first. A rotted post is replaced; a sound post in a failed footing is reset deeper; a post bracket only buys time. Decision Guide Swing vs sliding gate: which is better for a driveway? Swing gates suit level drives with room in front of them. Sliding gates suit slopes, short drives and tight lots, as long as there is room along the fence for the gate to roll. Learn How deep should fence posts be? Deep enough to resist the load the fence puts on them. Height, wind, gates and the soil all change the answer, so posts on one fence are not all the same depth. Decision Guide What is the best fence for dogs? The one built for how your dog escapes. Jumpers need height, diggers need a barrier below grade, and barkers do better behind a fence they cannot see through. Decision Guide Should you repair or replace your fence? Repair when the damage is limited to a few posts, boards or a gate. Replace when posts are failing along the whole line, or when you want a different fence.