how do you level ceiling grid for acoustic ceilings?
The cheapest way is a tube level. Fill a long clear plastic tube with water. (Long enough to reach all around the room.). The level in both ends will be the same. If you fix one end at your reference point you can move the other end anywhereon the grid, and the water level will be the same as the reference point.
Their are a couple of ways to level the grid. One is to buy a laser that shoots a level beam that you can measure from. Another is to use a plastic milk jug with a 3/8 clear flexible tube attached to the side near the bottom. Fill the jug 3/4 full of water. Unscrew the cap on the jug. Buy enough 3/8 tubing so that it will reach the entire room from one central spot. Hold the tube up to the wall, wait for the water to settle, and make a mark. Continue this until all marks are created. You may want to buy some blue or green food coloring to see the water line better.
use a level and adjust the wire hangers.
