One of the main purposes of textures is covering up imperfections in walls and ceilings. If your walls have cracks or uneven surfaces, adding a texture layer conceals them and makes the surface appear even. Textures are commonly used on ceilings. Ceilings reflect light, which makes any imperfections even more noticeable. Even flawless new ceilings in recently built or renovated homes may show evidence of settling in time, and textures diminish the resulting natural flaws.
Acoustic texture, also known as popcorn texture, is often applied to ceilings for increased noise insulation. It is often used in apartments and other buildings with multiple levels. The heavy texture also covers up any ceiling imperfections. However, as noted in an MSN Real Estate article, popcorn ceilings have disadvantages. Many people consider them unattractive, and popcorn ceilings in older homes may contain asbestos. The ceilings were especially popular in the 1950s, which is why they are so common in older properties.
Although some wall textures conceal imperfections and muffle sound, others are applied for aesthetic purposes. Faux finishing techniques create swirls, wood-grain patterns, sand and other textures. Use household items, such as brooms, sponges and wood-graining tools. As noted by CBS News, these techniques provide an alternative to wallpaper, and you can do them yourself with a bit of experience. Practice on a piece of board or an unused section of a ceiling or closet wall before attempting textures in a more conspicuous area.
Consider hiring a professional to add texture to your walls if the space is large and you don't have much experience. This is especially true for textures that are done by hand, such as combing, rag rolling, squishing and sponging techniques. If you decide to do your own wall texturing, use wall rollers for large areas and brushes for small areas, if you use texture paint. Texture sprays are easy for ceiling use and are often inexpensive as well.