The longer a given roof last the lower the lifecycle cost. Any given roof will last longer with maintenance. If not enough maintenance is performed, the lifecycle is decreased and lifecycle cost increases. If too much maintenance is performed, the maintenance cost exceeds the benefit of increased lifecycle and lifecycle cost increases. There must be a balance between cost of the maintenance and benefit to the lifecycle. Just the right amount of maintenance increases the lifecycle and reduces the lifecycle cost to its lowest possible number. The true cost of maintenance is therefore $0.00.