By Haley Kosik/WJEZ News

The organization raising money to renovate the Illinois governor’s mansion said the most pressing need is replacing the ailing roof on the 160-year-old building.

In a news release, the Illinois Executive Mansion Association said it plans to release construction specifications to contractors interested in repairing the roof.

Leaks from the roof — which hasn’t been replaced in 45 years — already have caused water damage inside the mansion.

Jeff Evans is volunteering with the association and owns a Springfield architectural and construction management company. He said it’s important to replace the roof “as soon as possible.”

Evans said: “We must make it watertight to combat future leaks and further interior damage.”

Gov. Bruce Rauner has said all repairs will be paid for with private funds.