N° 058
GreensboroughSteps
Greensborough, ON·2023
“A stair that reads as a single glowing ribbon at night, and a single slab of limestone by day.”
N° 058 · Patios
The home's original entry was a five-tread concrete stair with a poured nose that had crumbled along the leading edge for years. We rebuilt the entry as a sequence of monolithic limestone treads with a contrasting basalt nosing, lit from within each riser so the stair reads as a glowing ribbon at night.
The new treads had to land precisely on the existing door threshold — no margin for error — and the LED channels had to be sealed against meltwater that would routinely run down the riser face every spring.
We laser-scanned the existing threshold, ordered the treads pre-cut to ±1 mm, and milled a 12 mm chase on the underside of each tread for the LED ribbon. Every channel is sealed with a low-modulus silicone before the basalt nosing is bonded in place.
Materials used
- M.01Owen Sound limestone — 150 mm monolithic treads
- M.02Cambrian black basalt nosing
- M.03Low-voltage 24V LED ribbon
- M.04Low-modulus structural silicone
- M.05Bonded mortar bed
What we delivered
- 01Laser scan of existing threshold
- 02Pre-cut tread fabrication
- 03Footing & bedding mortar
- 04LED chase milling & sealing
- 05Tread setting & basalt bonding
- 06Lighting commissioning & client training
The first night we got home and the stair just glowed up at us — I sat in the car for a full minute. It is the single best thing we have done to the house.
The craft, day by day.
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Day 14
Every Anissa Inc. project begins the same way: a quiet walk of the property, a measuring tape, a sketch.
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