How to Tell if a Wall Is Load-Bearing
Quick answer
Exterior walls usually carry load. For an interior wall, check which way the joists or trusses run, whether a wall, beam, or posts sit directly below it, and whether joists end or overlap above it. A wall running across the joists is likely load-bearing. You cannot confirm it from the room alone.
Start With Which Way the Joists Run
Joists rest on the walls that hold the floor or ceiling up. A wall that runs across them, at a right angle, is the likely support. A wall that runs parallel to the joists usually carries no floor or ceiling load and is a partition. You can see the direction from the basement or crawlspace, where the floor joists are exposed, and from the attic, where the ceiling joists are.
- Exterior walls: usually load-bearing.
- A wall running across the joists: likely load-bearing.
- A wall running parallel to the joists: probably a partition.
Then Look Under and Over the Wall
A load-bearing wall passes its load down to the foundation, so look for what is directly below it: a beam, posts, a foundation wall, or another wall. In the attic, look at whether joists end or overlap above the wall. Load passes down floor by floor, so bearing walls usually stack, with one directly above another all the way to the foundation.
- Joists overlap above the wall, and the roof or ceiling framing bears on it.
- A beam under the floor, carried by a post.
- A footing, where the load ends up.
- A partition: the framing runs past it and nothing structural is directly below.
| Clue | What it suggests |
|---|---|
| An exterior wall | Usually load-bearing |
| Runs across (perpendicular to) the joists | Likely load-bearing |
| Runs parallel to the joists | Probably a partition |
| A beam, posts, a foundation wall, or another wall directly below it | Likely load-bearing |
| Joists end or overlap above it | Likely load-bearing |
| A wall directly above it on the next floor | Likely load-bearing |
| Doubled or thicker framing | Possibly structural, but not proof |
These are rules of thumb that point to a wall worth checking, not a way to clear one.
Does a Truss Roof Change the Answer?
It can. Trusses can clear-span from one exterior wall to the other, and partitions can be moved under them. But a truss can also be designed with extra bearing points on interior walls, and those supports have to be carried down through the walls and floors below to the foundation, according to the Structural Building Components Association. The truss design drawing shows where the supports are. A truss roof alone does not tell you an interior wall is safe to remove. See load-bearing wall removal for what happens when a bearing wall comes out.
What Not to Rely On
- A matching wall. Because one wall is not load-bearing, its twin on the other side of the house is not necessarily the same. Room symmetry and design logic prove nothing.
- Not seeing a support. Hidden beams exist, and earlier renovations can bury supports in the ceiling.
- One wall doing all the work. Loads are often shared between several walls.
What to Do Before Any Wall Comes Out
Do not cut into a wall you have not had checked. A structural engineer or a licensed contractor should look at the framing above and below it and confirm what the wall carries. Taking out a load-bearing wall also needs a permit; see remodeling permits in Wichita for which office issues it. When we look at a wall, we evaluate the wall and the structure above it first.
Load-Bearing Wall FAQs
Are all exterior walls load-bearing?
Almost always. Exterior walls typically support the roof and any upper floor and carry that weight to the foundation, so check before cutting a new opening in one.
Does a truss roof mean no interior walls are load-bearing?
No. Trusses can span from one exterior wall to the other, but a truss can also be designed with an extra bearing point on an interior wall. That support has to continue down through the structure to the foundation, and the truss design drawing shows where the supports are.
Who can confirm whether a wall is load-bearing?
A structural engineer or a licensed contractor who checks the framing above and below the wall. A look from the room is not enough, because loads are often shared between walls and supports can be hidden.
Sources
The guidance in this article comes from these pages.
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