Why does my wooden gate sag over time?

Almost always inadequate hinge sizing or screw-mounted (rather than through-bolted) hinges that work loose under the gate's sustained weight. Re-hang with properly sized strap hinges through-bolted to both the gate and the post.

What size hinge do I need for a garden gate?

A rough guide is hinge length equal to one-third to one-half the gate's height, with two hinges for a light gate and three for a heavy one. A 4-foot gate would use 16 to 24-inch strap hinges.

Should gate hardware be painted or left to weather naturally?

Painted black is the traditional and correct finish for most New England gate hardware, matching the convention for fence and railing ironwork generally. Unpainted weathering is acceptable for rustic or agricultural settings where a raw iron look is intentional.

Iron Gate Hardware — Old Canaan Building Materials

A fence or gate is specified by its material — wood, iron, granite post and chain — but the hardware that actually makes a gate function is its own specification, and it is easy to get wrong even on a correctly specified gate. The hinge has to carry the gate's weight without sagging. The latch has to operate reliably for decades. These are mechanical requirements as much as aesthetic ones.

The Character

Traditional gate hardware in New England is heavy and simple: strap hinges extending well onto the gate face for leverage, a thumb latch or simple gravity latch for closure, all in black-finished iron or steel. The visual weight of the hardware should be proportional to the gate — a delicate hinge on a heavy gate will sag and fail; an oversized hinge on a light garden gate reads as clumsy.

What It Is

Strap hinges for wood gates: cast or wrought iron, 12 to 24 inches in length depending on gate size, mounted to both post and gate face with through-bolts for heavier gates. Thumb latches: simple gravity-operated mechanisms, cast iron or forged steel, mounted at a height accessible from both sides of the gate. For iron gates, hinges are typically welded or pinned as part of the gate fabrication itself.

How It Behaves

Correctly sized strap hinges, through-bolted rather than simply screwed, support a gate's weight for decades without sagging. Undersized or screw-mounted hinges loosen over time as the gate's weight works the fasteners loose, leading to the sagging gate that is one of the most common fence maintenance complaints.

Why It's Right

Hardware sized and selected correctly for the gate's actual weight and use frequency is the difference between a gate that operates smoothly for fifty years and one that requires re-hanging within five. This is a structural specification, not merely a decorative one.

How To Get It

From architectural hardware suppliers and blacksmiths. Specify hinge length proportional to gate height (roughly one-third to one-half the gate height per hinge, with two or three hinges depending on weight) and confirm through-bolt mounting for any gate over 4 feet tall or built from dense wood.

The Old Canaan Standard

Cast or wrought iron strap hinges, through-bolted, sized to one-third to one-half the gate height, with a gravity thumb latch, black finish, for wood and iron gates on traditional New England properties. Size hardware to the gate's actual weight, not to its nominal size. This is the detail that determines whether the gate still closes correctly in twenty years.

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