A customer once asked me for the toughest steel shutter I had. I told him I don’t sell steel. He looked at me like I was trying to hand him the cheap version.
Fair reaction. Steel sounds stronger than aluminum, so if you don’t do this for a living, “aluminum shutter” sounds like a downgrade. It isn’t. Let me walk you through what’s really on your storefront.
What it’s made of, and why aluminum is the right call
The shutters I install are aluminum. Interlocking aluminum slats that roll up into a box above the opening and come down into tracks anchored to your building.
People hear aluminum and picture a soda can. That’s not this. These are engineered aluminum slats built to interlock, and the strength comes from the whole system — the slats, the tracks, the way it’s bolted into the structure.
Aluminum gives you the barrier you need for a storefront without the two problems steel brings. A steel curtain that size is heavy, which is harder on the motor and the mechanism over years of daily use. And steel rusts, especially in Bay Area damp and coastal air. Aluminum doesn’t. The strength comes from how the slats interlock and how the whole thing anchors to your building. The weight of the metal is not the point.
If somebody is selling you “galvanized steel” as the premium upgrade for a rolling storefront shutter, ask them why. For this product, aluminum is the standard for good reasons.
Solid or perforated: the choice that changes your day
Here’s the choice that changes your day-to-day, and it has nothing to do with steel versus aluminum: solid or perforated.
A solid shutter is a full barrier — total privacy, no sightline in, the storefront goes dark behind it. A perforated shutter is punched with a pattern, so it’s around half open. People can see through it, light comes through it, and passersby can still see your window display while the barrier is down.
The metal is aluminum either way. What you’re really choosing is how much you want to see through it. I wrote a whole piece on how to make that call — the short version is that a liquor store and a jewelry boutique usually land in different places for good reasons.
What the finish is really for
The shutters come powder-coated, in a range of colors — white, bronze, black, grey, beige, and a couple more.
Powder coating gets baked onto the aluminum. That’s why it lasts outdoors and doesn’t peel the way a painted finish does. Those flaking, chalky shutters you’ve seen on older storefronts downtown are usually an old or cheap finish giving out. The aluminum underneath is usually fine.
How to read a shutter spec without getting spun
If you strip away the sales language, four things decide your shutter:
The slat — aluminum, interlocking, that’s the curtain. The tracks and anchoring — this is where the forced-entry resistance comes from, so ask how it mounts to your building. The finish — powder coat, and which color. And solid versus perforated — how much you want to see through it.
Those four are the whole decision. The word “steel” stamped on a brochure tells you almost nothing about any of them.
Where to start
If you’re comparing shutters and getting lost in metal grades and buzzwords, the fastest way through it is to look at your actual storefront and talk through those four choices. Give me a call. I’ll come walk it with you and tell you straight what your opening needs and what’s just brochure language.
— Jessie Bajwa
Owner, Affordable Security Shutters
Fairfield, CA · 707-840-3435
