Metal Stud vs Wood Stud — GTA Construction Guide

Wood is structural — it carries roof, floor, and seismic loads. Standard cold-formed metal studs (25-gauge for non-load-bearing partitions) carry no vertical load. Heavier-gauge structural metal studs (16-gauge and lower) exist but cost significantly more and require an engineered design.

Wood is the default for residential single-family construction in Ontario for several concrete reasons:

1. load-bearing — wood handles vertical loads from above with code-defined sizing that most crews know by memory
2. cost and availability — every lumber yard in the GTA stocks 2x4, 2x6, and engineered LVL without lead time
3. labour pool — framing crews across the GTA train on wood, so qualified help is easier to source
4. natural connection to wood floor systems — no transition hardware needed
5. lower thermal conductivity than steel — wood reduces thermal bridging through the wall cavity
6. cheaper overall for typical residential cavity assemblies.

For new homes, additions, garden suites, and most basement renovations, wood remains the correct choice.

Metal studs are the better choice when:

1. commercial or industrial fit-outs require non-combustible framing under building code, insurance, or tenant lease terms
2. fire-rated separations between dwelling units in townhouses and multi-unit residential buildings demand UL/ULC-rated assemblies that metal simplifies
3. wet areas — post-flood basement remediation, pool enclosures, or commercial kitchens benefit from framing that won't rot or mould
4. tall walls over 12 feet stay straighter with cold-formed structural metal studs than with wood
5. dimensional stability is a priority — metal eliminates seasonal warping
6. high-rise multi-residential projects, where the 2024 OBC amendments reinforce non-combustible interior framing requirements above certain building heights
7. shop-fabricated assemblies — metal panels can be prefabricated into modules off-site.

On long, repetitive commercial runs, metal install is faster. A GTA fit-out crew can frame 1,000 sq ft of metal stud partition per day; wood crews typically reach 600–800 sq ft.

Wood runs 5–15% cheaper than metal on a per-square-foot basis for typical partition walls. That gap reverses on large commercial runs, where metal's faster install pace offsets the higher material cost. Labour rates in Toronto rose roughly 8% between 2024 and 2026, which makes install speed a more meaningful factor in total cost than it was two years ago.

The Ontario Building Code treats both wood and metal as approved framing materials. Differences emerge in three areas: Part 9 residential builds (wood is overwhelmingly used and well-supported in the code); Part 3 commercial and multi-unit residential (non-combustible construction is mandatory above certain building heights, a threshold reinforced by 2024 OBC amendments); and fire-rated assemblies (UL/ULC ratings for metal-stud walls are more numerous and often simpler to specify than equivalent wood-stud assemblies).

For any wall taller than 10 feet, or in any commercial or industrial context, commission an engineered design. Cold-formed structural metal stud framing is governed by AISI S100 in North America, and the wrong gauge or stud spacing will fail inspection.