To prevent warping, start with high-quality, kiln-dried wood that has low moisture content. Seal all surfaces of the bench with a wood sealant or varnish to protect against moisture changes. Avoid placing the bench in direct sunlight or extremely humid areas, as temperature and humidity fluctuations cause wood to warp. Regularly apply protective finishes and store the bench in a sheltered area during extreme weather conditions. Additionally, ensure proper airflow around the bench by elevating it slightly off the ground.
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