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Part 4: Roofing Maintenance Cost Calculations
By Karen Warseck
July 2010 -
Roofing Article Use Policy
A poorly maintained roof will last only about half of its service life, costing facility managers hundreds of thousands of dollars. Don't believe that? Let's do the math.
Say you have a 50,000-square-foot roof, with a 10-year design life. The cost to install it was $10 a square foot. That means the roof cost $500,000 to install. The cost per year of the roof is $50,000 per year. If the roof is not maintained, and it only lasts half of its design life, the yearly cost of this roof jumps to $100,000 a year. If that happens, in 5 years, you will need another $500,000 to replace it.
The cost to maintain a roof averages about 2 percent of the roof installation cost per year. In our example, that means $10,000 a year. Over 10 years, that means $100,000. Spending that money to keep the roof maintained means the roof should last its full service life, which in turn means that you will only have to spend that $500,000 once. So even though you have spent $100,000 over the roof's service life, you may well have saved $400,000 by not having to replace the roof prematurely.
— Karen Warseck
Part 1: Regular Roofing Maintenance: When to Inspect the Roof
Part 2: How to Inspect a Roof
Part 3: Roofing Contractors: Do You Need One?