Our DuraBuild (TM) slab doors are industry standard, furniture-grade particleboard or MDF core surrounded by either a film laminate or thermofused melamine on front and back. We edgeband and laminate with a PUR glue that heat can’t melt. Our products will never fall apart because they are in a hot environment. Our doors match perfectly and have the same materials on front and back, so they are very unlikely to warp. We periodically test their water resistance by putting them in a dishwasher on a normal wash cycle. We offer a lifetime warranty against delamination.