Squeeze the glue onto the side of the Styrofoam that will attach to the ceiling.
Spread out the glue over the entire surface with a glue roller to ensure even coverage.
Press the Styrofoam to the aluminum ceiling and hold it in place until it sticks.
Smooth your hand gently across the surface of the Styrofoam to ensure the entire surface is in contact with the ceiling.
Apply the hot glue directly to the metal and spread around with a glue roller. Hot glue can melt Styrofoam if applied directly to it.
Line up the Styrofoam piece with the glue on the ceiling.
Press the Styrofoam onto the ceiling and smooth over the surface lightly with your hand.
Hold the Styrofoam in place until it sticks without falling.