To prevent warping, use properly dried or kiln-dried wood that has acclimated to your room’s humidity for at least 48 hours before installation. Ensure the wall and wood are sealed and maintained properly, especially in humid environments. Using a moisture barrier between the wall and wood can also help. Maintain consistent indoor humidity with a dehumidifier, especially in areas prone to high moisture. Additionally, sealing the wood with a quality finish can prevent moisture from penetrating, reducing the chances of warping over time.