Stair planning guides
Get your stair dimensions right the first time
Short, practical guides for the decisions that stall most stair projects: rise and run, headroom, comfort, and layout selection.
Stair calculations
Comfort
Using the Blondel formula for comfortable stairs
What the Blondel formula (2h + g) measures, why the target sits near 600 to 640 mm, and how to use it to balance riser height and tread depth.
5 min read
Stair comfort grade explained
How a stair comfort grade combines riser height, going, pitch and the Blondel value, what the score tells you, and where your own judgment still matters.
4 min read
Planning
Stair headroom: what to check before building
How stair headroom depends on the floor opening, slab thickness and finishes, and the layout mistakes that cause clearance problems near the top of a flight.
6 min read
Common stair design mistakes to avoid
Stair design mistakes that surface late: fixing the step count too early, leaving headroom and openings until the end, and ignoring how people move around.
6 min read
Layouts
Straight vs quarter-turn stairs: choosing a layout
Straight or quarter-turn stairs? Compare footprint, landings, comfort and circulation to pick the layout that fits a compact room or a corner.
5 min read
Planning a half-turn staircase
The dimensions to check when designing a 180-degree half-turn (U-shaped) staircase with two flights: flight balance, landing size and arrival direction.
5 min read
Workflow
What to include in a staircase PDF export
A checklist for a staircase PDF you can use for review, quotes or early planning: entered dimensions, calculated results, three views and the editor link.
4 min read
Why shareable stair design URLs matter
When a stair design lives in its URL, you can share it with a builder or client and reopen it later, without an account or a project database.
4 min read
Renovation
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