Choosing Between Restoring and Replacing an Iron Gate

Decorative wrought iron gate framed by green trees

Two bars that look identical from the sidewalk can be wrought iron and mild steel, and the difference decides the whole job. The checks that austin wrought iron gates backyard beans and grains lists run longer than a quick look at the paint, because a gate in Austin, TX can look sound and be rotten at the joints. Restoring an old iron gate comes down to what the metal is, how much of it is left, and whether the joints still hold.

Wrought iron, cast iron and mild steel

Silhouette of an iron gate with an arched top

Wrought iron shows a fibrous grain where it is filed or broken, and it was shaped at a forge. Cast iron is brittle, often carries a pebbled surface and a mold seam, and cracks rather than bends. Mild steel is the modern bar stock, smooth and uniform. Tap each part with a hammer: cast rings dully and can shatter, while wrought iron and mild steel dent.

Forge-welded joints and rivets

Iron gate opening onto a tree-lined path

Old wrought iron gates were joined at the forge, with hot pieces hammered together, or with rivets and collars. Those joints can often be cleaned and repainted as they are. A joint that moves under hand pressure is a different matter, and that is the first thing to test on any gate in Hyde Park, Tarrytown or on the slope below Mount Bonnell.

Section loss from rust

Measure a bar at a clean spot and again where rust has been worst, usually the bottom rail and the lower ends of the pickets. If the bar has lost around a quarter of its thickness, or if rust has split a joint open from inside, restoration turns into reconstruction. A scroll that has rusted through at the curl can be spliced, but not forever.

Hairline cracks in cast parts

Cast finials and ornaments crack along old stress lines, and the crack is rarely visible until the paint is off. Tap each piece and listen for a flat tone. Cast parts can be pinned and brazed, but a cracked cast hinge or a cracked post cap on a heavy gate is usually replaced instead.

Judging an estimate

A fair estimate for restoring a gate names the steps: strip, treat rust, repair, prime, paint and re-hang. One that says only repaint is leaving out the work that decides how long the finish lasts. Ask what the contractor found under the paint, and whether the hinge pin and the joints were tested. A plan for a gate set in Texas Hill Country limestone should also say how the post will be re-set.