How Do I Judge the Quality of Iron Gate Work

Ornate metal gate with nature motifs in a lush park with vibrant flowers.

Most people pick a gate contractor on the look of a fresh coat and never ask how the joints were welded. Near Carlsbad the marine layer sits on bare steel most mornings, so weak points show up within a year or two, and iron gates carlsbad auto stem orders its questions by what fails first on the coast. Welds, prep, coating, hardware and posts come up in that order.

Weld Joints

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Ask whether the joints will be fully seal welded or stitch welded, and why. A seal weld closes the seam so water cannot get inside a length of tubing. A stitch weld leaves gaps that can hold moisture and let rust start from the inside. Stitch welding has a place on some flat bar work, but the contractor should be able to say where and give a reason. A vague answer is itself informative.

Surface Prep and Galvanizing

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Ask what prep happens before coating: grinding, blasting or chemical cleaning. Paint over mill scale and weld spatter lifts early. Then ask whether the steel is galvanized before it is painted or powder coated. That matters most in coastal air around Oceanside, Encinitas and the shoreline near Agua Hedionda Lagoon. Powder coat finishes do not all perform the same, because the prep and the system under the color decide how long it holds.

Look at Older Work

Ask to see finished gates that have been in service a few years. Check the weld seams, the picket bases and the hinge areas for rust bleed, blistering or lifted edges. Water collects at the bottom rail and where each picket meets the frame. A thick coat does not prove good fabrication, so look at what is happening at the seams underneath it.

Hardware and Fasteners

Hinges, latches and fasteners should be rated for exterior or marine use. Fasteners should also be compatible with the gate metal, since mismatched metals corrode where they touch. On an aluminum frame, a plain steel bolt will stain and seize. On a wrought iron swing gate or a slide gate, the operator and gate opener bolt to the same frame, so a cheap fastener there is a repeat service call waiting.

Posts, Footings and the Written Proposal

Hinge post size and footing depth should match the gate weight and width. Heavier is not automatically better, because a heavy leaf on an undersized post sags and drags. A dual swing pair splits the load between two posts, while a single swing hangs everything on one, so the post and footing for each should be sized differently. A cantilever gate puts a different load on its footings again.

Get the materials, the coating system and the post setting described in writing. When two proposals list the tubing wall, the prep, the galvanizing and the footing depth, they can be set side by side and compared line for line. A proposal that says only "custom gate, painted" cannot be compared to anything.