The Iron Shop — Since 1971
OUTDOOR
SPIRAL
STAIRCASES
Built to withstand the harshest outdoor conditions — rain, snow, UV, and salt air. Precision-engineered galvanized steel, aluminum, and Trex® composite spiral staircases for decks, pools, gardens, and commercial applications.
Our Outdoor Collections
BUILT FOR THE ELEMENTS
Every outdoor spiral staircase is engineered from the ground up to resist corrosion, UV degradation, and extreme temperatures — without sacrificing beauty.
Most PopularGalvanized Steel Series
Hot-dip galvanized inside and out for maximum corrosion resistance. Ideal for coastal climates, pool surrounds, and high-humidity environments. Available in 20+ powder-coat colors.
- ✓Hot-dip galvanized coating
- ✓Meets all exterior building codes
- ✓Diameters 42" – 72"
- ✓20+ powder-coat color options
LightweightAluminum Series
Naturally rust-proof aluminum construction — no painting required. The lightest outdoor spiral staircase we offer, perfect for elevated decks, rooftop terraces, and mobile applications.
- ✓Naturally rust-proof aluminum
- ✓No painting or sealing required
- ✓50% lighter than steel
- ✓Ideal for elevated decks & rooftops
PremiumTrex® Composite Series
Combines a galvanized steel structure with high-performance Trex® composite tread covers. The look of natural wood with zero maintenance — no staining, sealing, or rotting ever.
- ✓Trex® composite tread covers
- ✓Zero maintenance — no staining
- ✓Splinter-free, fade-resistant
- ✓Matches your existing Trex® deck
4.9
Customer Rating
Why The Iron Shop
50+ YEARS ENGINEERING
OUTDOOR STAIRCASES
Since 1971, The Iron Shop has shipped over 100,000 spiral staircases across all 50 states. Our outdoor kits are precision-engineered to withstand rain, snow, UV, salt air, and freeze-thaw cycles — and they're designed to be installed in a single weekend.
All-Weather Rated
Engineered for rain, snow, UV, and coastal salt air
Hot-Dip Galvanized
Inside-out corrosion protection that lasts decades
Code Compliant
Meets IBC and IRC exterior staircase requirements
DIY Weekend Install
Pre-cut, pre-drilled kits with step-by-step guides
20+ Color Options
Powder-coat finishes to match any home exterior
Expert Support
Talk to an outdoor stair specialist before you buy
Compare Our Outdoor Series
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
Call or submit the form. An outdoor stair specialist reviews your project, site conditions, and local code requirements.
02
Custom Design
We configure your staircase — diameter, height, tread material, handrail style, and powder-coat color — and provide a detailed rendering.
03
Precision Manufacturing
Your staircase is precision-cut, hot-dip galvanized, and powder-coated in our Pennsylvania facility. Ships in 3–5 weeks.
04
Weekend Installation
Pre-numbered components arrive ready to assemble. Most outdoor staircases are installed in a single weekend with basic tools.
Perfect For
OUTDOOR APPLICATIONS
Deck Access
Connect upper and lower deck levels or provide ground-level access from an elevated deck without consuming valuable floor space.
Pool Surrounds
Corrosion-resistant aluminum and galvanized steel are ideal for pool environments where chlorine and moisture are constant factors.
Garden & Landscape
Create dramatic level changes in terraced gardens, hillside properties, and outdoor living spaces with a compact spiral design.
Commercial Exterior
Code-compliant outdoor spiral staircases for restaurants, retail, hospitality, and multi-family residential projects.
Hillside & Slope Access
Navigate steep grade changes on hillside properties with a spiral staircase that requires a fraction of the footprint of a switchback stair.
Rooftop Terraces
Lightweight aluminum spiral staircases are the preferred choice for rooftop access where structural load is a consideration.
Installation Gallery
REAL OUTDOOR INSTALLATIONS
5'0" Code Welded Aluminum — Exterior Deck
5'0" Victorian One® — Garden Access
Victorian One® Brass — Outdoor Portico
6'0" Victorian Two® — Multi-Level Deck
5'0" Oak Kit — Covered Outdoor Landing
Black Steel — Cedar Deck Installation
Customer Stories
WHAT OUR CUSTOMERS SAY
"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
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.
GET A FREE QUOTE.
Tell us about your outdoor staircase project and a specialist will contact you within one business day — no pressure, no obligation.
- ✓Free design consultation
- ✓Detailed rendering of your staircase included
- ✓Transparent pricing, no hidden fees
- ✓Permit documentation provided
- ✓Contractor & builder pricing available