Popcorn ceilings, also known as acoustic ceilings or cottage cheese ceilings, are a type of textured ceiling finish that was popular in the 1950s and 1960s. They are made by spraying a mixture of popcorn-shaped styrene beads and adhesive onto a ceiling surface. Popcorn ceilings can help to reduce noise and improve acoustics in a room, and they can also hide imperfections in the ceiling. However, they can also be difficult to clean and remove.
There are a few different ways to popcorn a ceiling. The most common method is to use a popcorn sprayer, which is a specialized tool that mixes the popcorn beads and adhesive and then sprays them onto the ceiling. Popcorn ceilings can also be applied by hand, but this is a more time-consuming and labor-intensive process. Once the popcorn has been applied, it can be painted or left unpainted. Popcorn ceilings were once popular because they were a relatively inexpensive way to finish a ceiling. They were also thought to be fire-resistant and sound-absorbing. However, popcorn ceilings have since fallen out of favor due to concerns about their safety and health risks. Popcorn ceilings can contain asbestos, which is a known carcinogen. They can also trap dust and allergens, which can trigger respiratory problems. As a result, popcorn ceilings are no longer recommended for use in new construction.