It's usually the first question before a renovation: that wall I want to remove to open the kitchen onto the living room — is it load-bearing? The answer matters. A load-bearing wall carries the weight of the structure above it — floors, walls, roof — and removing it without properly replacing it can compromise the whole building. Here are the clues that help you recognize one, and their limits.

Clues that suggest a load-bearing wall

None of these signs is proof on its own, but together they point toward a diagnosis:

  • Orientation relative to the joists. A wall running perpendicular to the floor joists above it has a good chance of carrying their load. A wall parallel to the joists is more often just a partition.
  • Position in the building. Central walls, which pick up loads at mid-span, are frequently load-bearing. Exterior walls almost always are.
  • Continuity from floor to floor. A wall aligned with another wall, a beam or a column on the level below (or in the basement) is probably part of the load path.
  • The presence of a beam. If the wall sits under a beam or supports one, it is very likely load-bearing.
  • Thickness and stiffness. Load-bearing walls are often thicker and more rigid than partitions.

The misleading clues

Conversely, some features suggest — without guaranteeing — that a wall is not load-bearing: a wall parallel to the joists, a short partition that doesn't continue through the floors, or a wall clearly added after construction. Be careful, though: earlier renovations may have changed the load path, and a wall that was originally "non-bearing" can end up carrying load over time.

Why an engineer should confirm it

The problem is that the real load path is invisible. It depends on how the building was designed and modified, the span of the joists, the available supports and the structure of the upper floors — all hidden behind the finishes. That's why, in Quebec, modifying a structural element is engineering work: depending on the scope of the work and municipal requirements, it may require signed and sealed plans by an OIQ engineer, in accordance with the National Building Code and the Quebec Construction Code.

An on-site visit lets the engineer confirm whether the wall is load-bearing and, if so, design the replacement beam and the necessary supports, then provide the sealed plans required for your municipal permit.

Before the first swing of the hammer

Never demolish a wall on a hunch. If you have any doubt — and you almost always will — have it checked. Our page Load-bearing wall: opening and removal details our process, and our residential structural expertise answers exactly this kind of question. You'll know precisely where you stand before you start.

Unsure about a wall in your home? Contact our team in Quebec City and Lévis.