Outdoor Stairs
Exterior metal stairs, built in our own factoryDeck · Terrace · Second storey · Pool garden
Custom outdoor stairs, exterior steel stairs and custom exterior metal stairs for villas and homes — from a deck, terrace or pool garden down to grade, built for rain, salt air and UV.
Double Building (DBM) is a staircase factory in Foshan, Guangdong. Every custom exterior staircase is drawn to your deck height and site, built in hot-dip galvanized steel, aluminum or marine-grade stainless, trial-assembled in our workshop, and crated in labelled install order. Your local contractor installs; we do not install on site.
Shop drawings · factory quote
Send deck height and a photo note. We reply with shop drawings.
Outdoor metal stairs that have already been fitted once
Owners looking for pre-built outdoor stairs usually want one thing: a stair that fits the first time. A custom outdoor staircase from us is built to your deck, stood up complete in our workshop, then labelled and crated in install order.
Drawn to your site
Send a sketch, a drawing or a deck photo. Shop drawings come back with rise, run and footing details for your site.
Hot-dip galvanized
Galvanized steel is dipped in molten zinc after welding, so welded joints and inside surfaces are coated too.
Trial assembly
We stand the stair up in our workshop and check the fit before the crate leaves.
One labelled crate
Photo-documented and bundled in install order, with an assembly manual for your local contractor.
Straight to a deck, with a landing, or up to a second storey
Three shapes cover most homes. Each outdoor metal staircase is drawn to your deck height and built on the same weather-finished steel frame.
Straight Run to a Deck
One run from a deck or terrace down to grade. Grating or pan treads drain rain, and the frame stands on levelling footing plates.
Outdoor Metal Stairs with Landing
A landing splits a tall rise into two runs on the same line — common for a high deck or a second-storey balcony.
L-Turn to a Second Storey
Turns 90° at the landing to run along a wall, for a second-storey entry or a rooftop terrace.
Exterior metal stairs we build to order
Exterior metal stairs residential owners order
Homeowners order most of our outdoor stairs; small mixed-use buildings use the same drawing-first process.
Villa & Country Home
Coastal villa owners often want garden steps down to the pool. Courtyard homes often choose stone-cap or hardwood treads, and country homes let the stair sweep from terrace to lawn.
New Home Build
New-home drawings often include terrace access, a rooftop landing, a second-storey balcony entry, or garden steps between levels. We take rise, run and footing detail from your finished levels.
Apartment & Condo
Apartment terraces, condo balcony entries, a rooftop deck, and outside stairs between split-level units. Where a straight run would block a small terrace, a round helix may fit better; see spiral stairs.
Multi-Unit & Mixed-Use
When the same outdoor stair repeats across a renovation, modular stairs are built to one drawing: the frame comes pre-drilled for posts and treads, and size and finish stay the same from unit to unit.
Built for rain, salt air and UV
Every metal staircase outdoor in the weather starts from the finish. Hot-dip galvanized steel is the default. Where the stair is on show, we add a powder-coat color over the zinc. Coastal and pool-side sites often take aluminum or marine-grade stainless, or stainless connectors at the wet points.
Pan treads get drain holes and grating treads drain through the grate, so water does not pool. We add weep holes where standing water would collect.
Treads, finish and infill
Four steps, every outdoor stair
Drawn for approval
Rise, run, footing detail and the code-family list, set to your deck.
Fabrication
Steel welded, then hot-dip galvanized or powder-coated in our Foshan workshop.
Trial assembly
The full stair stood up on our workshop floor and checked, then taken down.
One labelled crate
Packed in install order for ocean freight; your local contractor installs.
Outdoor steel stairs, from our floor to the site
Workshop clips and client feedback from the Double Building channel. Tap a clip to play it here.
Before you order outdoor metal stairs
Do the stairs arrive pre-built?
Your exterior metal staircase arrives in labelled parts, not as one welded piece. The full stair was assembled and checked on our workshop floor first, then crated in install order with an assembly manual for your installer.
Can you build for a second-storey entry or a high deck?
Yes. A tall rise usually takes a landing — two runs on one line, or an L-turn along the wall. Send the deck height and the space at the bottom, and we draw the options.
Can the stair sit on uneven ground or a sloped yard?
Levelling footing plates and shimmed base brackets let installers level the stair on a sloped pad or staggered footings. Send the high and low points beneath the landing, and we draw the leveling detail into your shop drawings.
How is the steel protected against rain, salt air and UV?
Galvanized steel is dipped in molten zinc after welding, so welded joints and inside surfaces are coated too. For coastal or pool-side installs we can add powder coat over the zinc, or use stainless connectors at the wet points.
What clearance does the stair need?
A straight run needs landing space at both ends and headroom above the treads. Send a top-down sketch of the deck or wall, and we mark the clearance zone on the shop drawing before fabrication.
Who checks the code, and who does the installation?
A licensed engineer in your country reviews and signs off the drawings; we do not. Shop drawings list IRC, IBC, AS 1657, AS 1288, NCC and CSA. We draw, build, trial-assemble and ship; your local contractor installs.
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