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→Life Cycle Costs
==Life Cycle Costs==
==Life Cycle Costs==
Below are capital and life cycle cost estimates for the extensive, 4 inch deep sedum mat [[Green roofs| green roof]] design configuration over 25- and 50-year time periods. The estimates of maintenance and rehabilitation (life cycle) costs represent net present values. Operation and maintenance costs are predicted to represent 4% of total life cycle costs over the 25-year evaluation period, and increase to only 6% of total life cycle costs over the 50-year period.
Below are capital and life cycle cost estimates for the extensive, 4 inch deep sedum mat [[Green roofs| green roof]] design configuration over 25- and 50-year time periods. The estimates of maintenance and rehabilitation (life cycle) costs represent net present values. Operation and maintenance costs are predicted to represent 12% of total life cycle costs over the 25-year evaluation period, and increase to 18% of total life cycle costs over the 50-year period.
===25-Year life cycle cost break down===
===25-Year life cycle cost break down===