Supa Doors’ humble beginning originate in South Africa, where a lifelong woodworker, inventor, and door fabricator named Ronald Amoretti began testing MDF as a preferred alternative to solid wood in the 1980s. The resistance to warping, twisting, and bowing, along with the durability, heftiness, recycled nature, and great finish, gave him great hope that MDF doors would become the first choice for paint grade stile and rail doors.