VALPARAISO | It turns out the water problems at the Porter County Courthouse are not likely the result of a leaky roof after all.

It appears the problem lies with the limestone structure itself, particularly the top 3 feet, said Stephen Kromkowski, architecture division manager with the DLZ firm.

Kromkowski told the county commissioners Tuesday evening there are sections of the building where the mortar is loose or missing, and where the stone is pulling away. The limestone is also absorbing water, he said.

The commissioners responded by agreeing to have DLZ prepare the documents necessary to seek competitive bids for the repair work.

The rainwater infiltration at the courthouse is causing the most problems on the fifth floor, at the two entrances, on the balcony and porches, and in the mechanical room, Kromkowski said.

The water damage was also blamed earlier this year for contributing to an ongoing mold problem in the building, which led to the removal of wallpaper and treatment of the walls.

Tuesday's report frustrated Porter County Commissioner Bob Harper, who said millions were spent less than 15 years ago to renovate the building.

"It just gets me we spent all that money on that building and it's falling apart," Harper said.