Much of the Manion roof has a steep slope covered in individual slate tile shingles. During the 2020 derecho, the wind ripped many of the shingles from the roof to be found later in various places across the estate, including several pieces in the adjacent formal gardens. Unfortunately, this loss destabilized the rest of the remaining slate across all elevations of the building.
In the immediate aftermath of the storm, damaged slate was removed from the mansion and the remaining pieces were stabilized. In 2023, the slate roof was removed and replaced.
This work was funded by insurance.