Can acoustic ceilings be painted?

Acoustic ceilings can be repainted, but painting will cause the Noise Reduction Coefficient (NRC) to decrease because the paint blocks the pores or surface used by the material to absorb sound energy. The extent of the reduction depends on the type of paint, paint film thickness, and number of coats. If you require acoustic ceilings in a specific color without significantly compromising performance, the most recommended approach is to select the color shade during the manufacturing or installation stage—such as Trandar's Seamless Acoustics system, which supports custom color selection from the start rather than repainting later.

Why does paint affect sound absorption performance?

Acoustic ceilings work by allowing sound waves to penetrate the material through specially designed pores or surfaces. Sound energy is then converted into minor heat as it travels through the internal fibrous or porous structure, rather than reflecting back like typical hard surfaces.

When painting over the surface of the material—especially with thick film paints like oil-based paints—the thick paint film blocks the pores or seals off the entry points for sound waves trying to penetrate the material. As a result, more sound waves reflect back instead of being absorbed, causing the factory-rated NRC value to decrease in proportion to the thickness of the applied paint film.

Factors determining the extent of NRC reduction

• Paint Type Thin water-based paints that are highly permeable have less impact than oil-based paints or thick film-forming paints.

• Application Method Spraying a thin layer of paint has less impact than using a roller or brush, which usually leaves a thicker paint layer.

• Number of Coats The more coats applied for solid coverage, the more pores are clogged.

• Substrate Material Materials with very fine pores may be clogged more easily than those with coarser, open structures.

Generally, if repainting is strictly necessary, choose a thin-formulation paint specifically recommended for acoustic materials and spray the thinnest possible coat to minimize the impact on the NRC rating.

The Best Approach is Choosing the Finish from the Start, Rather Than Repainting Later

Because post-installation painting always impacts sound absorption performance regardless of how carefully it is done. The recommended approach for projects requiring custom-colored acoustic ceilings is to select the color shade during the manufacturing or ordering stage. This allows manufacturers to control both the color and the sound-absorbing surface structure to work together in harmony without sacrificing performance later.

Trandar Acoustics Ceilings and Color Options

Trandar Acoustics offers multiple acoustic ceiling lines designed with custom colors and textures available right from the manufacturing stage. Especially the Seamless Acoustics Solution series NanoGain, which allows free selection of textures and color shades during production. This delivers the desired design while maintaining acoustic absorption performance according to the specified design. It is ideal for projects requiring seamless ceilings in specific tones, such as hotel lobbies or spaces where design is the main selling point. Alternatively, Trandar ZIVANA panels can be painted without any loss in acoustic performance, offering versatile design options and unique aesthetics.

In cases where ceilings have already been installed and you genuinely need to adjust the color afterward, the Trandar Acoustics team can also provide recommendations on paint types and application methods that minimize impact on the NRC value.

If you are planning to choose acoustic ceiling colors for your project—whether you want to know which Trandar product lines offer your desired shade or wish to consult about the impact on sound absorption values—feel free to chat with the Trandar Acoustics team.