Glass vs. Cable vs. Steel Railings: How to Choose

We build all three, so we have no reason to talk you into one. Here is how they actually compare.

Side by side

	Steel	Cable	Glass
Relative cost	Lowest	Middle	Highest
View	Interrupted	Nearly open	Completely open
Maintenance	Minimal	Tension check	Regular cleaning
Best for	Interior stairs, general use	Long deck runs, openness on a budget	Views worth paying for
Weak spot	Blocks sightlines	Posts must be sized right	Shows spotting; costs the most

Steel

The default, and the right answer more often than people assume. Vertical picket, horizontal bar, or ornamental. It is the most affordable custom option, it takes any finish, and powder-coated it is effectively maintenance-free outdoors.

Choose steel when the railing is architecture rather than a window: interior stair runs, entry landings, anywhere there is no view to preserve. A well-detailed steel rail looks deliberate. A glass rail in a spot with nothing to look at just looks expensive.

Where it loses: it is the one system that genuinely interrupts a sightline.

Cable

Stainless cable on steel posts. Reads as very open, costs meaningfully less than glass, and handles long exterior runs well.

The thing to understand about cable is that cost is driven by posts and terminations, not by cable footage. Every post is a fabrication and an install operation and every run of cable needs terminating at both ends. So a long straight deck is efficient, and a short run with three corners is not.

Where it loses: it depends entirely on being built right. Under-sized posts or spans that are too long let the cables push apart under load — which is both a code failure on the 4-inch sphere rule and the reason some cable railings look slack after a couple of years. Kit systems are where this usually goes wrong. We build the posts ourselves and size them to the run.

Glass

Frameless or semi-frameless, on steel hardware we fabricate in-house. Nothing else disappears the way glass does — particularly from a seated position, which is where you actually experience a deck.

Frameless uses a continuous base shoe or point fittings with no top rail, so the glass is the guard. Semi-frameless runs a slim steel top rail and posts: less money, more tolerance for movement in the substrate, and a lighter look than a steel rail.

Where it loses: cost, and honesty about cleaning. Glass shows hard-water spotting from sprinklers and rain runoff, and it shows fingerprints. Neither is structural, and both are visible.

Code applies to all three equally

Whatever the material, in Washington the guard still has to be at least 36 inches at open-sided walking surfaces and 34 inches on the open sides of stairs, and it cannot have an opening that passes a 4-inch sphere (2021 Washington State Residential Code, R312.1.2 and R312.1.3).

Glass clears the sphere rule automatically — there is no opening. Steel clears it with picket spacing around 4 inches on center. Cable is the only one of the three where passing depends on engineering rather than on the material, because the requirement is about the gap under load, not the gap at rest.

There is more detail in our guide to Washington railing code.

How to actually decide

Ask what the railing is competing with.

If there is a view, and it is the reason the house is where it is, glass is worth the money. If you want openness across a long deck without the glass number, cable. If the railing is not fighting a view, steel — and spend the difference on the detailing, which is what you will actually notice every day.

Send us photos of the space and we will tell you which one we would build there, with a rough number, usually within one business day.