Work on the windows, which City Planner Nancy Baker has said are in “immediate need of repair," will start as soon as possible, and is expected to be finished by Dec. 31.
The aluminum option is cheaper than steel, the original material for the jail windows, and was approved by the Historic Preservation Commission.
Baker said the aluminum windows "will look very similar to the historic window. ... They're a good, high-quality window.”
There are 17 jail windows that will be worked on, Baker said.
The project architect preferred the aluminum option for the jail windows as far as its ability and functionality, Baker said, because steel tends to warp.
Maintenance of the aluminum windows is also expected to be cheaper, she said.
The lowest bidder, CMM & Associates of Rockford, was approved at the Sept. 15 city council meeting to do the window work for a cost of about $160,789.
This bid includes restoration of wood windows, installation of aluminum windows, and sanding and painting the jail window bars.
There will be additional costs for lintel replacement and additional tuckpointing. Baker said it's hard to know how much extra work needs to be done before the project starts.
Money for the project comes from a downtown tax increment financing district that includes $250,000 for work at the Old Courthouse and Sheriff's House.