Railings & Structure

Deck Stairs & Landings in Canmore & the Bow Valley

Engineered stringers, code-compliant rise and run, closed risers for snow shedding, frost-proof footings - stairs that don't heave, sag, or squeak after a Canmore winter.

What's included

Our stair builds cover the full assembly from deck-side connection to grade landing: kiln-dried 2×12 SPF stringers (or engineered LVL for longer spans), closed riser boards, 5/4 or 2× treads to match your deck material, intermediate landings where the run exceeds Alberta Building Code, ABC-graspable handrails on both sides where required, and a frost-proof footing solution at the base. Every connection is mechanically fastened with Simpson Strong-Tie hardware - LSC stair connectors at the top, ABU post bases at the bottom, no toe-nailing.

For multi-storey decks we design and build full intermediate landing platforms that double as transition spaces - a place to rest, turn, and shed snow off your boots. Landings get their own helical-pile or pier footings, properly diagonal-braced, with continuous railing that meets the 42" guard height and 4-inch sphere infill rule.

Who this is for

New deck builds requiring a code-current stair from deck level to grade
Multi-level slope-lot homes in Silvertip, Eagle Terrace, or Three Sisters where stair runs exceed 12 vertical feet and need landings
Walkout basements where the deck stair is the primary backyard access
Homes with existing stairs that have heaved, twisted, or rotted at the base from frost-heave or snow-trapped moisture
Pre-2006 decks with stair geometry (rise over 8", inconsistent run) that no longer meets ABC and won't pass a pre-sale inspection
Hot tub and pool decks where a wider stair or landing is needed for safe traffic flow with wet feet

Our process

Measure total rise and run. We shoot the actual finish-grade elevation with a laser level - not eyeballed - and calculate equal-rise stair geometry that lands flush at the deck and the landing pad.
Footing design. Helical piles driven to 1.6 m or engineered concrete piers below the 1.2 m frost line. Floating pavers don't survive a Canmore winter and we won't use them at a stair base.
Stringer selection. 2×12 SPF for runs under 10 feet, LVL for longer or wider stairs. Engineered drawings for any stair over 13'-3" continuous span.
Hardware spec. Simpson LSC at the top, ABU44 or ABU66 standoff post base at the bottom, hot-dip galvanized minimum, marine stainless for any splash-exposed component.
Build and install. Stringers cut on site, dry-fit, closed risers installed first, then treads. Handrails returned to the wall or post at top and bottom per ABC.
Final inspection prep. We meet the Town of Canmore inspector on site if the stair is part of a permitted build and walk through every connection and dimension.

Stringer & material comparison

Component	Standard option	Premium option	Notes
Stringer	2×12 SPF kiln-dried	1-3/4" × 11-7/8" LVL	LVL stays straight under seasonal load
Tread	5/4 cedar or larch	Trex Transcend or Ipe	Composite resists ice melt salt
Riser	3/4" PT plywood	Matching tread material	Closed risers shed snow, prevent rot
Top connection	Simpson LSC	LSC + DTT2Z tension tie	DTT2Z for stairs over 4 risers wide
Footing	Helical pile to 1.6 m	Engineered concrete pier	Both beat floating pavers

Pricing factors

Total rise - pricing scales by stringer-step. A 7-step stair runs $1,800-2,400; a 14-step with landing runs $5,500-7,200.
Stair width - every additional stringer (3 for 36" wide, 4 for 48", 5 for 60"+) adds material and labour. Wider stairs also require LVL more often.
Landing requirement - an intermediate landing adds roughly $2,200-3,800 for footings, framing, and continuous railing.
Footing type - helical pile install runs $450-650 per pile; concrete pier with frost-depth excavation runs $550-800. Heaved-pier retrofits cost more than new construction.
Tread material - cedar and larch are baseline; composite or Ipe treads add 30-50% to the tread line item but eliminate refinishing and resist ice-melt salt damage.

Bow Valley local context

Canmore stairs deal with three conditions that most of Alberta doesn't. First, the 1.2 m frost line means any footing shallower than that will heave annually - we see it constantly on stair retrofits where the original builder set the bottom stringer on a 4-inch paver. Second, the 2.5 kPa snow load applies not just to deck surfaces but to stair treads and landings - a 4-foot-wide landing in Spring Creek can carry 250+ lb of snow load on top of foot traffic, which is why we use LVL stringers and tension-tied connections on anything over 4 risers wide.

Third, snow shedding off the main deck onto a stair below can drift to a depth that buries treads completely; closed risers (Alberta Building Code 9.8.4 for stairs over 3 risers) keep snow from compacting into the stringer pockets where it rots out the connection.

Permit note: stairs as part of a new deck build are covered under the Town of Canmore Building Permit (or Parks Canada in Banff). A standalone stair replacement on an existing deck still needs a building permit when the rise exceeds 600 mm above grade. We pull the permit and coordinate the inspection. Our average permit turnaround in Canmore is 14 business days; in Banff it's 3-6 weeks.

Why choose Canmore Deck Builders

Equal-rise stairs, every time

We measure the actual finish grade with a laser level and calculate stair geometry to land flush at the deck and the landing pad - no shortcut last riser, no half-step at the bottom that fails the ABC consistency test. Inconsistent rise is the most common stair-inspection failure we see on rebuilds.

±3 mm rise tolerance across the flight

Frost-proof from the bottom up

Every stair we build sits on a helical pile or engineered concrete pier set below the 1.2 m Canmore frost line. We've replaced more than 80 sets of heaved-paver stairs since 2015, all from other builders' shortcuts. We won't repeat the mistake on our own work.

1.6 m standard pile depth · zero heave callbacks

Simpson hardware throughout

LSC at the top, ABU at the bottom, DTT2Z tension ties on anything 4 risers wide or wider. Hot-dip galvanized standard, marine-grade stainless for splash-exposed components. Toe-nailed stringers are the single most common failure point on older Bow Valley decks - we don't use them.

100% mechanically connected · no toe-nails

Available across the Bow Valley

We deliver this service in Canmore, Banff, Exshaw, Dead Man's Flats, and Kananaskis.

Common Questions

Frequently asked - deck stairs & landings

What's the maximum stair run between landings?

Alberta Building Code 9.8.3 requires a landing every 12 vertical feet (3.7 m) of stair rise. For a 9-foot deck off a Three Sisters walkout that translates to a continuous straight run; for a 14-foot deck off a Silvertip slope-lot it means an intermediate landing. Maximum stringer span unsupported is 13'-3" - beyond that we add a mid-span beam or break to a landing.

What rise and run do you use for deck stairs?

Our standard is 7-1/2 inch rise and 11 inch run with a 1-inch tread overhang - comfortable, ABC-compliant (rise must be 125-200 mm, run 230-355 mm), and consistent for the whole flight. We calculate total rise across the actual measured grade and divide for equal risers rather than landing on an awkward last step.

Do deck stairs need closed risers in Canmore?

Alberta Building Code requires closed risers (or risers with openings under 100 mm) on any exterior stair with more than 3 risers. We close every deck stair as standard - open risers fill with snow and ice all winter in the Bow Valley, which creates a slip hazard and accelerates stringer rot from trapped moisture.

What kind of stringers do you use?

We use kiln-dried 2x12 SPF stringers for runs under 10 feet and engineered LVL stringers (typically 1-3/4" x 11-7/8") for longer runs or wider stair widths over 4 feet. LVL stays dead-straight under load - critical when stairs see seasonal snow load on top of foot traffic. Stringer-to-deck connection is always a Simpson LSC stair connector, not toe-nails.

How do you handle stair footings with Canmore's frost depth?

Bottom-of-stair landings sit on either helical piles driven to 1.6 m (well below the 1.2 m frost line) or a concrete pier on a frost-protected pad. Floating concrete pavers under stairs heave every winter in Canmore and tip the stringer base; we don't use them. The hardware connection from stringer to footing is a Simpson ABU44 or ABU66 standoff post base, which keeps end grain off the snow.

How much do new deck stairs cost?

For a code-current Bow Valley install, budget roughly $185-280 per stringer-step including tread, riser, and pro-rated handrail. A typical 7-step stair off a single-storey deck runs $1,800-2,400; a 14-step stair with intermediate landing on a multi-level Silvertip build runs $5,500-7,200. Pricing scales with stringer count (width), material, and any required frost-proof footing work.

Need new stairs or a landing rebuild?

Free on-site measure, code-compliance check, and frost-depth footing recommendation across the Bow Valley.

Get a free quote Call 403-678-2345