Outdoor Spiral Staircases
Built for the Elements.
Built to Last a Lifetime.
Our outdoor spiral staircase kits are engineered to handle what nature brings – from UV exposure and coastal moisture to freeze-thaw cycles and hard use. Every stair leaves our facility fully assembled and quality-checked, so what arrives at your door is exactly what we built.
100%
Satisfied Customers
55%
Years in Business
50
States Served
GET A FREE QUOTE.
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%
Satisfied Customers
%
Years in Business
States Served
Meets All Building Codes
Ships Fast
Weekend DIY Installation
All-Weather Engineered
Free Shipping on All Orders
Our Outdoor Collections
BUILT FOR THE ELEMENTS
From steel-grated decks to composite treads that handle foot traffic for decades, our outdoor staircase kits are available in three primary material series – each with different strengths and finishes. Every series is customizable and every kit ships direct from our facility with everything you need for installation.
Most Popular
GALVANIZED STEEL SERIES
- ✓Hot-dip galvanized for rust resistance
- ✓Non-slip treads for safe outdoor use
- ✓Available in Code and Non-Code configurations
- ✓Powder coat finish options in a range of colors
Lightweight
ALUMINUM SERIES
- ✓Lightweight, rust-free construction
- ✓Ideal for coastal and waterfront environments
- ✓Mill finish standard; powder coat available
- ✓Code-compliant designs available
Premium
TREX® COMPOSITE SERIES
- ✓High-performance composite tread and covers
- ✓Resists fading, staining, scratching, and mold
- ✓No painting, staining, or sealing required
- ✓Premium aesthetic with zero maintenance trade-off
★★★★★
4.9
Customer Rating
Since 1931
90+ Years Engineering Outdoor Staircases
The Iron Shop has been designing, fabricating, and finishing spiral staircases from a single facility in Broomall, Pennsylvania since 1931. Four generations of the Cohen family have run this operation – and every step of the process, from design and engineering to machining, welding, finishing, and shipping, still happens under one roof.
That’s not a positioning statement. It’s just how we’ve always worked.
90+ Years in Business
Engineered for rain, snow, UV, and coastal salt air
100,000+ Staircases Installed
Inside-out corrosion protection that lasts decades
125 Expert Craftspeople
Meets IBC and IRC exterior staircase requirements
1 Facility. Every Step.
Pre-cut, pre-drilled kits with step-by-step guides
Customer Guide
FIND THE RIGHT OUTDOOR STAIRCASE
Feature
Galvanized Steel
Aluminum
Trex® Composite
Rust / Corrosion Resistance
Excellent (hot-dip galv.)
Superior (naturally rust-proof)
Excellent (galv. + composite)
Weight
Heavy-duty
Lightweight (50% lighter)
Medium
Tread Material
Steel grating / plate
Aluminum grating
Trex® composite boards
Maintenance Required
Minimal (inspect coating)
None
None
Coastal / Salt Air Rated
✓
✓✓ (best choice)
✓
Powder-Coat Colors
20+
20+
20+ (+ Trex® palette)
Diameters Available
42" – 72"
42" – 60"
42" – 72"
Typical Lead Time
3–5 weeks
3–5 weeks
4–6 weeks
Best For
Decks, pools, gardens
Rooftops, elevated decks
Matching Trex® deck systems
How It Works
FROM QUOTE TO INSTALLATION
01
Free Consultation
Speak with a staircase expert who can walk you through measurements, materials, and code requirements – no pressure, just answers.
02
Custom Design
We configure your stair to your exact specs: diameter, height, direction of rotation, tread material, and finish.
03
Precision Manufacturing
Your staircase is fabricated in our Broomall, PA facility by our team of 125 craftspeople and shipped directly to you.
04
Simple Installation
Every kit includes all components and hardware. Most two-person crews can complete installation in a single day with basic hand tools.
Perfect For
OUTDOOR APPLICATIONS
Deck & Patios
Access upper decks without sacrificing yard space
Pool Surrounds
Rust-resistant materials designed for wet environments
Garden & Landscape
Beautify existing outdoor spaces
Commercial Properties
Code-compliant designs for public and commercial use
Hillside & Slope Access
Navigate grade changes with structure that holds
Rooftop Access
Durable, weather-rated access to rooftop decks and terraces
Installation Gallery
REAL OUTDOOR INSTALLATIONS
Arndt_fullspiral_White
Caption Caption Caption Caption
Exterior Diamond
Multiline
Wood Handrail
Exterior Mill Aluminum Diamond
5’0 Oil Rubbed Bronze Multiline
Hear first hand
WHAT OUR CUSTOMERS SAY
Featured Review
★★★★★
“We installed the galvanized steel spiral on our deck two years ago. It’s been through two brutal New England winters and looks exactly the same as the day we put it in. The installation took us one Saturday — my neighbor couldn’t believe we did it ourselves.”
Robert M.
Concord, NH
Galvanized Steel — Deck Access
★★★★★
“The aluminum staircase for our rooftop terrace was the perfect solution. Lightweight, rust-proof, and it looks incredible. The Iron Shop team walked us through every measurement and the permit documentation was included. Couldn’t be happier.”
Sandra & Tom K.
Miami Beach, FL
Aluminum Series — Rooftop Terrace
★★★★★
“As a contractor I’ve installed dozens of these. The Trex® composite series is my go-to recommendation for clients who already have a Trex® deck. Zero maintenance, matches perfectly, and the kits go together fast. The Iron Shop’s support team is top notch.”
Dave P.
General Contractor, Austin, TX
Trex Composite — Pool Surround
★★★★★
“Ordering spiral staircases over the internet from a Pennsylvania supplier (we are in Cincinnati, Ohio) was a bit daunting. And, indeed, they cost significantly more than offered at Home Depot or Lowes. Steve was our sales rep and he was very responsive. ”
Sean Michaels
Lewes, Delaware
Aluminum Series — Personal Beach
Common Questions
OUTDOOR STAIRCASE FAQ
Have more questions?
Call a spiral stair expert at 1-800-523-7427.
Mon–Fri 8am–8pm | Sat 8am–12pm EST.
Do outdoor staircases need to be painted?
Steel outdoor staircases should be painted to inhibit rust and protect your investment. We recommend an oil-based enamel with rust-inhibiting additive, applied after assembly. Aluminum stairs require no paint – mill finish is standard, though powder coat is available in a range of colors if you prefer a finished look.
Can I install the staircase myself?
Yes! Most outdoor spiral staircase kits from The Iron Shop can be assembled by two people with basic hand tools – no contractor required for the installation itself. We do recommend consulting a qualified contractor for cutting and framing the floor opening. Metal kits typically take one full day to assemble.
What's the best material for a coastal or waterfront environment?
For ocean, lake, or any waterfront setting, we recommend an all-aluminum staircase. Aluminum is naturally rust-free and requires no painting, making it the most durable long-term option in high-moisture and salt-air environments.
Do you offer code-compliant outdoor designs?
Yes. The Iron Shop offers Code and Non-Code stair configurations. Code stairs meet IBC/IRC requirements with in-between spindles (less than 4″ spacing between verticals) and compliant tread dimensions. Our design consultants can help you determine which configuration is required for your project and municipality.
GET A FREE QUOTE.
Tell us about your project and a staircase expert will be in touch – usually within one business day. We’ll help you work through measurements, materials, code questions, and anything else standing between you and the right stair.
- ✓Free consultation with a staircase expert.
- ✓No pressure. No obligation.
- ✓Ships directly from our Broomall, PA facility.
- ✓90+ years of engineering behind every kit.
We respect your privacy. Your information is never sold or shared.
Pay over time with AffirmAs low as 0% APR — Subject to credit check