Load bearing walls cross roof beams in a perpendicular direction.
Tell if a wall is load bearing from the attic.
However there are cases where a bearing wall is parallel to the joists.
If the wall is parallel above the joists it s most likely not a load bearing wall.
Generally when the wall in question runs parallel to the floor joists above it is not a load bearing wall.
Blueprints are always a great place to look.
Be extra careful with the walls that have other walls above it.
Using this technique you ll get a better idea of the location of the load bearing walls in your house.
If you have walls built in the same place on each floor of the home those walls are all most likely load bearing.
But if the wall runs perpendicular at a 90 degree angle to the joists there is a good chance that it is load bearing.
If it is a small home usually roof framing is in one direction only north south or east west.
The best way to tell if a wall is load bearing is to go in the attic ceiling space to see if there is any framing joists rafers trusses supported by that wall.
Assess your basement look in your basement or crawl space for steel beams or joists.
See if the wall runs through multiple levels.
Most load bearing walls will support the floor or walls above it.