Hardwood flooring over a concrete slab in a Toronto condominium

Specification

The assembled specification

Substrate

Concrete slab

Product construction

Engineered — hardwood wear layer over 90° cross-ply core

Method

Glue-down

Acclimation

Minimum 72 hours in the actual conditioned space

Moisture testing

Slab and material, documented, at estimate and again before installation

Operating band

35–55% RH

Dust containment

HEPA throughout the process

Sequence

The sequence, start to finish

1. Moisture-test the slab and the material; document both readings.
2. Confirm both readings sit inside the acceptable delta before ordering.
3. Acclimate a minimum of 72 hours in the actual conditioned space.
4. Assess and correct slab flatness before the price is fixed.
5. Confirm the building's acoustic requirement and how the assembly satisfies it.
6. Glue-down installation, with expansion gaps at every wall and fixed object.
7. HEPA containment maintained throughout.

Failure modes

Where this goes wrong

• Solid hardwood over a slab has no cross-ply core to resist seasonal movement. This is the substitution that fails most often.
• Slab flatness discovered after the deposit is the single most common source of change orders.
• Expansion gaps are missed at fixed objects mid-field far more often than at the perimeter.

Answer

What we recommend

Engineered, glued down, over a slab that has been tested and flattened before the price was fixed. Nothing in this scenario is negotiable on budget grounds.

Provenance

Where every claim on this page comes from

• Climate Mastery — method and substrate
• Climate Mastery — protocol
• The Intelligent Homeowner's Decision Framework — decision tree
• The Intelligent Homeowner's Decision Framework — fixed price

Framework pillars this bears on

• Pillar 2 — Substrate and method
• Pillar 1 — Moisture and acclimation
• Pillar 4 — Expansion and movement

Once this is decided

What the work actually is

Hardwood Flooring Installation · Hardwood Floor Refinishing · Dust-Free Floor Sanding · Hardwood Floor Restoration · Custom Inlays & Borders · Stair Refinishing

Prices for all three bands are published before you call — hardwood flooring in Toronto for a new floor, refinishing for an existing one, stairs for the part usually left out of the quote. If the floor is already cupping, gapping or lifting, this is a diagnosis rather than a decision: what your floor is telling you.

Proof, with the numbers

Where these decisions were made on real jobs

Each publishes the readings and the reasoning, not only the result — which is what makes them worth reading next to a guide rather than instead of one.

Every case study publishes what was measured, not only what was achieved — all of them are here, and each one names the substrate, the species, the readings and the protocol it followed.

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