Technical Information

No, aluminum railing does not rust. Aluminum naturally resists corrosion, unlike steel or iron railing, which rust over time, or wood and composite railing, which can warp and rot. This makes aluminum a strong choice for outdoor and coastal applications.

Aluminum railing offers rust resistance, low maintenance, a long lifespan, and a lighter weight than steel without sacrificing strength. It also holds paint and anodized finishes well and requires no annual sealing, staining, or repainting like wood railing does.

See our full comparison: Aluminum vs. Other Railing Materials.

Aluminum railings commonly last decades with minimal maintenance, since the metal resists rust, corrosion, and warping. Other railing materials, such as wood or steel, typically require repainting, coating, or full replacement well before an aluminum system does.

Building codes generally require railing once a drop exceeds 30 inches. Residential railings must be at least 36" high, measured from the ground to the top of the railing. Commercial applications, such as apartment buildings or hotels, require a minimum height of 42". Local code can vary, so confirm requirements with your building department.

Read more: Do You Know Your Code?

Aluminum railing cost depends on the series and project specifications, since every Superior Aluminum system is custom-built. Series 6E is the lowest-cost option. Series 9P — the most popular square picket railing for residential and commercial use — sits at a medium price point. Series 9C (cable) and 9M (mesh) carry the highest price points for a premium aesthetic.

Request a quote for pricing specific to your project.

Yes, most Superior Aluminum columns are load-bearing. Maximum capacity ranges from 13,000 lbs to 80,000 lbs depending on column style, shape, and diameter. Full figures by column style and size are in the table below.

*Subject to availability. Unlisted lengths available upon request.

Load-bearing capacity varies by column style and diameter, ranging from 13,000 lbs to 80,000 lbs. For example, an 8" Square Smooth column holds up to 24,000 lbs, while a 10" Square Panel column holds up to 80,000 lbs. Reference the full capacity table below or confirm with your Superior Aluminum representative for your exact column style and size.

*Subject to availability. Unlisted lengths available upon request.

Yes. All Superior aluminum product lines are available in a mill finish for third-party painting or chemical treatment. Superior recommends adequate surface protection before permanent installation, since unfinished aluminum should not be installed long-term without a coating.

Clean aluminum columns with warm, soapy water for routine dirt and debris removal. For tougher grime, use a 1:1 vinegar-to-hot-water mix to clean and restore shine. Regular cleaning helps preserve the finish and extends the product's durability.

See the full cleaning and maintenance guide.

Aluminum columns are typically secured to a concrete surface with L-brackets rather than set directly into concrete, following standard construction practices.

Aluminum columns are installed by securing the base to the mounting surface, typically with L-brackets, then attaching the column shaft and cap per the column style. Full steps, tools, and safety precautions are in the Aluminum Column Assembly Instructions.

Yes, nearly all aluminum column sizes and styles are available with wrap-around functionality to encase an existing structural post. The one exception is the 4" square smooth column, which is not available in a wrap-around version. Maximum encaseable sizing varies by column style — see the chart below.

*Subject to availability. Unlisted lengths available upon request.

Yes, aluminum columns can be cut down using a chop saw with a metal or carbide-tipped blade. Cut columns slightly shorter than the install area's height so they fit more easily during installation.

See the Aluminum Column Assembly Instructions for full detail.

Superior uses PPG Duracron paint on aluminum columns, caps, and bases. Duracron extrusion coatings meet AAMA 2603 specifications and are factory-applied to cleaned, pretreated aluminum for film integrity, color retention, and weather resistance.

Use a multi-purpose metal primer designed for the application, applied to a clean, dry, dull surface, followed by a paint compatible with the coating manufacturer's recommendations. Superior recommends consulting a local paint supplier or professional painter to select the right combination for your climate and application.

Yes, aluminum railing attaches to Superior aluminum columns using Superior brackets — most commonly level brackets, with vertical or horizontal swivel brackets also available. Round columns can use an adaptor to create a flat mounting surface.

Note: Superior does not generally supply the anchors used to attach brackets to the column, and premium railing options are not currently compatible with this attachment system.

Aluminum columns, PVC columns, caps, bases, and accessories can be ordered online through Superior's store, or through a local dealer or lumber yard using Superior's Find a Location page.

Yes, though it's not required. PVC column wraps come in a weather-resistant standard white finish. If painting is desired, use 100% acrylic exterior paint or acrylic with a urethane additive, with a Light Reflective Value (LRV) of 55 or greater. Note that painting voids the warranty.

For Snap-Tite PVC columns, a 6" column wraps a 4x4 post, and an 8" column wraps a 6x6 post. Columns are available in 8' or 10' lengths.

Snap-Tite PVC columns install without glue or adhesive using a patented snap-together design. Full steps are in the Snap-Tite PVC Column Installation Instructions.

PVC columns are anchored at both the capital and base using one of three standard methods:

Method A: L-brackets (sold separately).
Method B: Screw directly into the treated wood post, if the column is centered within 1/4".
Method C: Add treated blocks around a Post Jack and drill in — Tapcon screws for concrete, wood screws for wood.

Spacers are not required, but are recommended to alleviate potential weakness along the long portions of the column. Some installers add spacers on all four sides; others use spacers on one side and secure the column to load support on the opposite side.

No, PVC columns are wrap-around only and should not be used in load-bearing applications.

No. Snap-Tite PVC Column Wraps use a patented snap-together design and are the industry's first PVC column wrap that requires no glue or adhesive.

Yes, but proper blocking must be installed on the support post inside the column first to ensure a strong connection.

PVC columns, aluminum columns, caps, bases, and accessories can be ordered online through Superior's store, or through a local dealer or lumber yard using Superior's Find a Location page. Contact Superior directly for large-order or bulk pricing.

Use a high-end acrylic primer and paint designed for exterior fiberglass applications. Superior recommends consulting a local paint supplier or professional painter to choose the right combination for your climate and installation.

Satin Anodized is an electrochemical finish that converts the surface of aluminum into a durable, corrosion-resistant anodic oxide layer. Some color variation is normal between similar alloys, and greater variation can occur between different alloys.

No special paint is required. PVC column wraps come in a standard white finish that doesn't need painting. If painting is desired, use 100% acrylic paint, with or without a urethane additive, with a Light Reflective Value (LRV) of 55 or greater.

Yes. All standard finishes offered by Superior adhere to the provisions set forth by the American Architectural Manufacturers Association (AAMA).

Extruded pieces — top and bottom rail, posts, pickets — are painted with PPG Duracron paint. Castings, such as brackets, caps, and bases, are powder coated.

The standard finish is 15M Clear Anodized (AA-M12-C22-A21), with a minimum coating thickness of .15 mils. Series 500 and 550 also offer 60M Clear Anodized (AA-M12-C22-A41) and 60M Brushed Anodized (AA-M35-C22-A41), both Architectural Class 1 finishes with a minimum thickness of .7 mils. Anodized finishes outside the standard 15M Clear option may carry additional cost.

Minimum thickness is .8 mils for painted finishes and .15 mils for anodized finishes. Actual thicknesses typically exceed these minimums.

Yes. Duranodic coatings can be applied to any Superior product at an additional fee, in colors ranging from Champagne to Black.

Yes. Any Superior product can be custom painted in a special color or high-performance paint for an additional fee.

All Superior products are available in a mill finish for painting or chemical treatment by a third party. Superior does not recommend installing any product permanently without adequate surface protection first.