What Does “Custom Fence Fabrication” Actually Mean?

Three things people call “custom”

The word gets used for three different things. Ask which one you are being quoted, because they differ in how well they fit the site, how they are finished and what the warranty covers.

• Stock panels with options. A manufacturer’s ornamental fence comes in set panel widths and heights, with a choice of picket top, color and accessories. Fortress’s Athens aluminum line, for example, lists 71-inch panels in several heights and styles. Ameristar’s Montage steel panels are 8 feet long (92 inches actual). Choosing among these is customizing. Nothing is built for your site.
• Stock panels modified on site. The installer racks panels to follow the ground, cuts a short panel to finish a run, or adds posts. This is still a stock system, and it is how most stock fences fit real yards. The catch is in the finish and the warranty: a cut through coated steel leaves bare metal (see below).
• Shop-fabricated sections and gates. The metal is cut and welded to the measurements of your site, then finished. It can follow any grade, fill any opening and copy any pattern. It is also the option where the coating depends most on how the work is done.

None of these is “better” in general. A level backyard on a standard layout is usually best served by a stock system with a factory finish. The rest of this page is about how to tell when it isn’t. For the design service itself, see custom fence design in Galveston. For gates, see custom gate design.

Test 1: Can a stock panel follow your ground?

Ornamental panels handle a slope in one of two ways. A rackable panel lets its rails tilt while the pickets stay plumb, so the fence follows the ground. A panel that can’t rack far enough has to be stepped: it stays level and drops at each post, leaving a triangle of open space under the low end.

The limit is a number the manufacturer publishes. Fortress lists its Athens aluminum panels as “fully rackable” to 12⅜ inches, which it describes as up to 10 degrees of grade change. Across a 71-inch panel, that is a rise of about 17 percent (12⅜ ÷ 71). Ultra’s aluminum specification says racking is done at the factory at no extra charge, and that on a slope, post spacing is measured along the grade, not level. Ameristar sells its Montage steel panels as welded and rackable. Whatever system you are quoted, ask for its rack limit in writing.

Most of Galveston Island is close to flat, so slope rarely forces the issue on a typical island lot. It comes up on graded pads, berms, drainage swales and driveway aprons, and where a fence climbs to an elevated house. Step past the rack limit and you have three choices:

• step the panels and accept the gaps underneath,
• regrade so the panels can rack, or
• build sections to the slope.

If the fence is a pool barrier, stepping is usually ruled out by the gap rule (see the pool section below).

Test 2: Does the opening fit a stock gate?

Gates are where most “custom” work actually happens. Stock gate lines come in set widths and heights. An opening between two existing brick columns, a walkway set by the house, or a driveway that is a few inches off a standard width doesn’t change to suit the catalog. The gate has to be built to the opening, or the opening has to be rebuilt.

That’s why many jobs end up as a stock fence with a gate built to the opening. If the gate will be automated, settle that before it is built. The frame, the hinge side and the operator mounting all depend on it (see custom gate design). Ultra’s specification, for one, calls for welded swing gate frames that hold a 300 lb vertical load on the latch side, and self-closing, self-latching walk gates. Ask for the same kind of written numbers on any gate built for you.

Near salt water, the coating decides whether custom is worth it

Steel rusts where it is bare. On a stock ornamental steel panel, the protection is put on at the factory over the whole welded panel. On a custom piece, it is only as good as what is done after the last cut and weld. That is the question to ask any fabricator, and the standards make it easy to ask precisely:

• Galvanized tube (ASTM F2408). The steel is hot-dip galvanized before or after it is formed, then powder coated or painted. This is what most stock ornamental steel is.
• Black steel tube (ASTM F2589). The same kind of fence made from steel that is not galvanized. It relies on its paint or powder coat alone. Neither standard covers solid-bar or wrought iron.
• Galvanized after fabrication (ASTM A123). The finished, welded piece is dipped whole in molten zinc. The American Galvanizers Association describes A123 as the specification for steel that is fabricated and then galvanized. It coats the welds and, if the piece is vented, the inside of the tube.

Galvanizing after fabrication has design rules of its own. The AGA says fabrications need vent and drain holes. Without them, trapped cleaning solution flashes to steam at pressures up to 3,600 psi, which can rupture the piece or leave bare spots. For welded pipe assemblies such as handrail, which is the closest AGA example to a gate frame, it calls for external vent holes as close to the weld as possible and not less than 3/8 inch, ½-inch vents in end sections, and open tube ends. Hinges should be galvanized separately, be of the loose-pin type and be fitted afterwards. Moving parts need at least 1/16 inch of radial clearance for the added zinc. A fabricator who galvanizes after welding will know these details. If one doesn’t, that tells you something.

Field cuts count too. Ameristar’s Montage warranty is voided by “any on-site cutting or welding” by the owner. Any cut must be sealed in three steps: remove the shavings, apply zinc-rich primer, then two coats of matching paint. Its warranty also says normal use “does not include … heavy salt spray exposure”. On a beachfront lot, read the salt clause in any warranty before you rely on it. The AGA notes that field repair of galvanizing (ASTM A780) works, but field fabrication that removes the coating “should be minimized”. Our steel fence page covers coatings in more depth.

Custom fence features worth asking for

These are the features people usually mean by custom fencing. Each one changes something on the quote, so it helps to know what.

• Following the grade. Racking within the maker’s limit is routine; Ultra’s spec does it at the factory at no additional charge. Going past the limit means stepping, regrading or fabrication.
• A gate sized to the opening. The most common fabricated item. Settle automation, the swing or slide direction and the hardware before the gate is built.
• Matching an existing fence. Picket spacing, rail heights, tops and finials copied from what is there. See matching an existing fence.
• Pool-ready infill. Under the 2021 ISPSC, which City of Galveston pool permits require, no opening may pass a 4-inch sphere. Where the horizontal rails are less than 45 inches apart, they go on the pool side and the vertical gaps shrink to 1¾ inches. Decorative cutouts are held to 1¾ inches as well.
• Decorative work. Arched tops, medallions, scrolls and cut panels like the one at the top of this page. They are one-off by nature, so they are fabricated.
• Mixed materials. A steel frame with wood or composite infill, for example. In a Galveston historic district, note that the design standards say not to mix wood and metal fence styles.
• Hardware built in. Drop rods, latch boxes, operator mounts and house numbers are easier to weld into a frame than to add later.

What custom does not mean is “more ornate”. A plain fence built to an awkward slope is as much a fabrication job as a scrolled estate gate. The defining thing is fit, not decoration. For how these choices move the price, see custom vs standard fence cost.

Custom pool fences: the code doesn’t care who built it

City of Galveston pool permits require compliance with the 2021 International Swimming Pool and Spa Code, and new fencing needs its own fence permit. Under ISPSC §305, a barrier must be at least 48 inches tall. It may leave no more than 2 inches under it on grass or gravel, or 4 inches over concrete, and no opening may pass a 4-inch sphere. Gates must open outward, away from the pool, and must self-close and self-latch. On a residential pool, an outside latch release that isn’t self-locking goes at least 54 inches up.

Two of these rules shape custom work. A stepped fence on a slope fails the gap rule at the low end of every panel, so a pool fence on sloped ground is usually racked within its limit or built to the grade. And decorative infill, such as scrolls, cut panels or wide picket spacing, has to be drawn to pass the sphere and cutout limits before it is made, not checked after.

When custom fabrication is worth it, and when it isn’t

Worth it: ground steeper than the rack limit; an opening no stock gate fits; a pattern to match or a historic design to reproduce; a pool barrier on uneven ground; or a design the catalogs don’t make. In these cases a stock system either can’t do the job or does it with gaps and compromises.

Usually not worth it: a level or gently sloped run of standard height, where a stock aluminum or galvanized steel system racks to the ground, arrives with a factory finish over every surface and carries a written warranty. Near salt water, that factory finish is a real advantage. Spend the custom budget on the gate instead.

Either way, the questions are the same: what is the rack limit, what fits the opening, and for any steel, how is it protected after the last weld? Those are the questions to settle at the on-site estimate. Fence and gate work on Galveston Island is covered on our Galveston Island page. For a Galveston job that paired a 93-foot fence with a 9.5-foot gate, see the project write-up.

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