Final answer:
To determine the height of the ceiling, measure the distance from the floor to the ceiling. To install level perimeter molding, measure the length of each wall, mark the desired height for the molding, and use a level to ensure it is straight.
Step-by-step explanation:
To determine the height of the ceiling, you can use a measuring tape or a laser distance measure. Simply measure the distance from the floor to the ceiling to get the height.
To install level perimeter molding, you will need a level, a measuring tape, a pencil, and molding materials. Start by measuring the length of each wall where the molding will be installed, then mark the desired height for the molding using a pencil. Use a level to ensure that the molding is straight and install it using appropriate tools and materials.