A bunkie board is a thin, flat support board typically made of wood, plywood, or particleboard, measuring about 1 to 3 inches thick. It is designed to be placed between a mattress and the surface or bed frame it rests on to provide a stable, solid, and supportive base for the mattress. Originally created for bunk beds to keep mattresses low and prevent hitting the ceiling or the bed above, bunkie boards have become popular as a mattress foundation for all types of beds. They are especially useful for foam and hybrid mattresses that need a firm, flat surface for proper support and to prevent sagging. Unlike box springs, bunkie boards add support without adding much height to the bed. Benefits of bunkie boards include affordability, portability, and the ability to work with any mattress size or type. However, they may reduce airflow under the mattress and, depending on quality, could warp or move slightly during use. Overall, a bunkie board functions much like a low-profile box spring or platform, making it a versatile and practical mattress foundation option.
