Clean the ceilings with a sponge or rag using water. Inspect for mold and mildew. Apply a liquid mold remover product if present. Fix any flaws such as nail pops, holes or other damaged areas before applying the texture. Fill in areas with drywall mud and sand smooth with a fine-grit sanding block. Wipe away any dust created.
Cover the entire floor areas with tarps and plastic sheets. The project will have plaster drops and spills. All furniture should be carried out of the room or heavily covered with plastic.
Stick painter's tape to the wall's ceiling line, onto the adjoining wall. Press the tape down well and burnish with your finger or putty knife.
Prime the ceiling. Apply a coat of primer with a paint roller. If the drywall is newly installed, two coats of primer are often necessary. Look for primers made especially for new drywall. Otherwise, use a regular latex primer. Allow the primer to dry according to the manufacturer's instruction. Often the dry time is between four and eight hours.
Stir the popcorn texture paint with a heavy duty paint stick. Begin to roll on the texture onto the ceiling using the texture, or loop, roller. Cover 4-foot-by-4-foot areas at once. Continue the process until the entire ceiling is textured. Allow to dry for four hours, suggests Behr. Once dry, look at the ceiling to see if you are satisfied with the results. Add a second coat of texture paint for more dimension.
Let the final layer of texture paint dry 24 to 48 hours. Roll on a coat of primer of the texture paint and then add two to three layers of acrylic paint.