Many of the oldest homes in the lower part of Chaska date to the 1850s, and much of that housing once sat in the Minnesota River floodplain, under rebuilding limits that ended when the 1998 flood control project was completed. Water in a lower level here deserves a close look at where it actually came from.
What a flooded lower level needs
The cleanup crew pumps out the depth first, then cuts away whatever stayed wet. Wicking carries water above the visible mark, so removal usually reaches higher than the stain. Rooms are opened section by section so nothing hidden behind a wall is missed.
- Carpet and pad are lifted and hauled out when they sat in water
- Drywall is cut a few inches above the highest wet reading
- Insulation on outside walls comes out because it holds water
- Concrete and block stay in place and are dried with heat and dehumidifiers
Older and newer lower levels side by side
A 2007 city plan estimate placed about 30 percent of local housing as built before 1980 and about 9 percent before 1960, with a large share added from 2000 to 2007. Homes from different decades share the same streets, so the crew reads each lower level on its own terms instead of assuming how it was built.
Drying concrete, block and framing
Concrete and block release moisture slowly, and a cold lower level slows it further. Heated air, low-grain dehumidifiers and airflow along the walls, the core of structural drying, bring readings down, with checks repeated until the slab and the framing meet the dry standard. A lower level can feel dry on the surface long before the slab and the sill plates are, so the crew trusts the meter over the touch.