A popular way to save so money during a remodel is to do your own demolition, and prepare the space for contractors as much as possible. But before you start tearing down walls, you need to know what's behind them and what they might be holding up—or else you'll create more problems.
Load bearing walls run perpendicular to floor joists and are typically situated towards the center of a home. Floor joists can be viewed from a basement or crawlspace. Keep in mind that a load bearing wall on the first floor will extend up to the top floor.
Exterior walls are always load bearing. If an addition has been added, an exterior wall may not be as evident, but it still bears the weight of what is above it.
Consult with an engineer or contractor to determine which walls are OK to remove.
Create less mess and work later by scoring the area between the wall that you are tearing down and the ceiling. This will prevent the sheetrock that you are removing from the wall taking down pieces of the ceiling with it.
Place a drop cloth or cardboard on both sides of the wall you are tearing down and cover the furniture in each room with sheets or plastic. Wood and drywall particles will get everywhere so prepare for that. If your home was built before 1978, make sure you have it tested for asbestos. Asbestos insulation should be removed by a professional.
After covering your furniture, protect yourself by wearing safety goggles, gloves, and a respirator mask.