Deck Stair Stringers: Pre-Cut vs Custom, Sizing, and Code-Friendly Options
Let’s be honest: nothing turns a straightforward deck project into a swear jar champion faster than a miscalculated deck stair stringer. Whether you’re a hands-on homeowner plotting your first big solo build or a seasoned pro who’s seen enough uneven stairs to last a lifetime, one question always comes up: Do you go with pre-cut, custom, or dive into the world of engineered stringer systems? Strap in – we’re about to break down what really matters for Prairie decks, minus the hype, all with a good dash of real advice and a sprinkle of “don’t do what Dave did.”
What Is a Deck Stair Stringer?
In plain English, a stair stringer is the backbone of your deck stairs – it’s what gives every step support so your treads don’t turn into a wobbly adventure park. Most are cut from 2x12 pressure-treated lumber, though you’ll find engineered and prefab options made in aluminium and steel that are designed to laugh at Prairie freeze-thaw cycles.
Deck Stringer Choices: Pre-Cut vs Custom vs Manufactured
No two backyards (or knees!) are the same. Here’s how your stringer options stack up.
| Option | Perfect For | Pros | Cons |
|---|---|---|---|
| Pre-cut stringers | Short runs, predictable heights, quick weekend builds | Fast, easy, no math headaches (as long as the rise/run matches up) | Doesn’t fit non-standard heights, can’t trim for partial steps, not always code-perfect |
| Custom stringers | Built-to-fit jobs, decks with unique heights/landings, picky stair comfort | Perfect fit for your numbers and your landing, smoother walking feel | More work, more room for cutting errors, a little scary with circular saws if you skip coffee |
| Manufactured/engineered systems | Pros, DIYers wanting bombproof results or clean modern looks | Consistent, no fuss, can work well even across wide stairs, often maintenance-free | Costs more up front, fewer ways to fudge things on-site if your measure is off |
How to Size and Choose the Right Stringer: A Prairie-Proof Framework
1. Start with the Total Rise (Vertical Height)
Measure from the top of your finished deck (yes, include the actual decking board thickness!) down to where your stair will land. In Saskatchewan, don’t forget that the ground may move a little due to freeze-thaw. If the bottom landing isn’t concrete, make sure you’re not setting your stairs up for a lifetime of winter heaving.
2. Pick a Comfortable Riser Height
Divide your total rise by a target riser height – most folks (and codes) land comfortably between 7 and 7 3/4 inches. If the math spits out something like 8.6 or 6.1, adjust the number of steps until you’re in code range and no one’s feeling ready for a StairMaster workout after pizza night.
3. Calculate Your Run (How Far Out the Stairs Stick)
Multiply the number of treads (that’s “the bits you step on”) by your desired tread depth. Most Canadian code falls in the 10-11 inch range. Get out the tape, measure from where the first step will land, and make sure you’re not wandering into the neighbour’s flower bed or blocking access to your winter squirrel feeding station.
4. Pick Your Stringer Option
- Pre-cut: Only if your result matches a pre-cut available. Examples: Most two, three, four and sometimes six step heights for short landings.
- Custom: If your math puts you outside the “one-size-fits-most” realm or you have a fixed landing height, just bite the bullet and draw out your own.
- Engineered/Manufactured: Want zero wood movement, super clean looks, or are tired of the stair wobble? Manufactured systems like Pylex Aluminum Stair Stringers or Regal QuickStep Connector Kits will never let you down, even when the thermometer reads minus “what were we thinking.”
When Pre-Cut Stringers Are the Hero (and When They’re a Villain)
Pre-cut stringers are a legit time-saver – but only when your deck’s height lines up with what’s on the shelf. Otherwise, it’s a bit like buying shoes a size too small and hoping they’ll stretch. Don’t trim partial steps! It’ll leave you with weird riser heights and a never-ending string of stubbed toes.
- Use pre-cut for 2-5 step transitions where the ground is flat and the deck is a standard height.
- If you only need two steps, our 2 Step Pre Cut Stair Stringer is perfect for landings like porches or sheds where precision and speed matter way more than showing off your geometry skills.
When Custom Stringers Are the Clear Winner
If your deck is an odd height, your landing is set, or you want each step to feel just right (think: carrying a plate of ribs and not wiping out), custom is your friend. Yes, you’ll spend more time marking, measuring, and checking twice. But you’ll nail perfect, consistent rises, comfy walking, and happier building inspectors – not to mention safer kids and less grumpy uncles.
- Required if your deck-to-ground height doesn’t match any pre-cut stringer…unless you’re into “surprise yoga lunges.”
- Best for longer or wider staircases. Custom means you control spacing for beefier stairs – especially handy if you run a local Euchre club and expect traffic.
For a deeper dive on how to tackle custom stairs, check out our blog on buying and sizing stair stringers.
Manufactured Stair Systems: The Modern, Code-Friendly Solution
If you’re all about long-term durability, or just don’t trust your circular saw after that one unfortunate shelving incident, engineered systems pay off. In Regina, Saskatoon, and across the Prairies, they’re especially nice for decks that take a beating from sun, snow, and every temperature between.
- Pylex Aluminum Stair Stringers are lightweight, strong, and pre-built to handle Canadian climate mood swings. They come in modular sections, so you don’t need a forklift – or chiropractor.
- Regal QuickStep Stair Stringer Connector Kits take the guesswork out of assembling clean and sturdy stairs, especially when paired with matching aluminium rails for that coordinated “deck envy” look.
Curious which engineered stringer will suit your extra-wide staircase or trickier build? Check out our in-depth guide on stair stringer choices for wide stairs.
The Prairie Code Reality Check: Keep Your Inspector (and Knees) Happy
- Even riser heights: All steps should be within a few millimetres rise. Keep it consistent, or you’ll run into local code issues fast, especially in Regina and Saskatoon.
- Tread thickness and top step: Always add your finished tread thickness to your measuring when laying out the top of your stringer. Don’t cheat, or your top step will be a tripping hazard (and a great story for the neighbours).
- 12” on centre or less: For composite or PVC treads, space stringers every 12 inches (sometimes closer for wide staircases or heavier traffic). Wood treads can sometimes stretch to 16.”
- Proper attachment: Use code-approved structural fasteners or hardware – framing screws, not drywall screws! For help picking the right fasteners, our team walks through this daily (and has a handy fastener guide).
Quick Prairie Pro-Tips
- Always cut or buy one test stringer first – set it in place and dry-fit treads before you batch cut the rest.
- Do not ignore the landing – changing soil height after a wet or snowy winter can mean rethinking your bottom step. Use concrete pads or compacted gravel in Saskatchewan to keep things stable.
- Top step is king: Most DIY fails we see are from mismatched top steps. Measure, re-measure, and then measure again (yes, we’re serious).
Best Practices for Deck Stair Stringers in Saskatchewan (Our Honest, Biased Tips)
- Bring your rise/run measurements to The Ultimate Deck Shop in Regina or Saskatoon – most problems get solved in five minutes at the desk, not three hours of rework in the yard.
- Precut works great for small jobs or secondary stairs, but custom or manufactured is safer for big decks, code inspections, or heavy family traffic.
- Plan for freeze-thaw shifts – if your bottom stair lands on dirt, put in a pad or compacted base to keep things stable, not “surprise ski slope.” See our blog on building for prairie winters for tips.
- Use matching railing and stair parts from the start – easier install, fewer code headaches, and a cleaner finished look. Talk to us about systems that lock it all together.
Frequently Asked Questions About Deck Stair Stringers
What if my deck height is weird and doesn’t match pre-cut sizes?
Custom is your answer. Or you can use a manufactured system with adjustable installation but double-check the instructions. If you need a hand figuring rise and run, pop into the store or use our free quote and stair planning service.
Can I use composite, wood, or aluminium treads with manufactured stringers?
Most modern aluminium and steel stringers can be paired with composite, PVC, or traditional wood treads. Always cross-check with the manufacturer’s specs and see our guide on compatible tread options.
How do I know if I’m meeting code?
Risings and treads within local code ranges, stringer spacing, and using approved connectors are required. If you’re unsure about the National Building Code standards or what’s specific for Saskatoon and Regina, ask our team or your local inspector before you build.
Why do some pre-cut stringers leave the top or bottom step funky?
If your total rise isn’t a perfect multiple of the pre-cut rise, your top or bottom step ends up taller or shorter than the rest. That’s both a code issue and a trip risk. In those cases, it’s worth drawing your own or switching to a manufactured solution that lets you adjust.
How do I make sure my stairs last through the winter?
Use pressure-treated or rot-resistant materials, ensure all fasteners are rated for outdoor/Prairie use, and consider engineered stringers for long-term stability. Want more cold-weather build tips? See our blog on building decks in Prairie winters.
Conclusion and Prairie-Friendly Call to Action
If you’re stuck at the “stair stringer stare-down” stage, trust us, you’re not alone. At the end of the day, there’s no one-size-fits-all answer – pre-cut is awesome when the numbers line up, custom rules when exactness counts, and manufactured options pay off for cleaner, stronger stairs (especially when winter’s on your mind).
The Ultimate Deck Shop is here to help you find the right solution for your project – no pressure, just real advice. Swing by our Regina or Saskatoon stores for a look at our stringer options, or hit tuds.ca to shop online, ask for a free estimate, or set up a side-by-side comparison with an expert who’s seen it all. Build smart, measure twice, and let your next set of deck stairs be the envy of the block (or at least not the punchline at the next BBQ).