What did the 2010 cloudburst show about water in Milwaukee?
The cloudburst on 22 July 2010 brought up to 7.5 inches of rain in two hours, and the city received at least 2,000 sewer backup calls. The event showed how fast water finds the lowest point of a building and how much of it can come in through the drains and the foundation.
A rain of that size is not one that a gutter or a grade can absorb without help. The water runs to the lowest place it can reach, and in Milwaukee that often means a basement, a low corner of the yard or the sewer line. The sewer backup calls in the days after the storm show that the water was not only outside the building. It came back up the drains into homes that were not flooded from the street.
The lesson for a pest visit is that a wet building is not a neutral building. Damp soil, a wet basement wall and a drain that has backed up change the conditions in the house, and they can make an existing entry point more active. A survey that ignores the water is a survey of a building that is not the one the homeowner lives in after a storm.
- Up to 7.5 inches of rain in two hours (NWS Milwaukee/Sullivan)
- At least 2,000 sewer backup calls in the city
- Water found the lowest point through the drains and the foundation
How does damp soil at the foundation affect pests?
Damp soil at the foundation keeps the wall base wet and can make the entries there more active. The sources this page relies on do not describe a specific insect for this condition, so the page presents moisture as a condition to correct rather than a pest to name.
Soil that sits above the floor level, or that is banked against the wall, holds water against the foundation for longer than the rain lasts. A wet wall base is less pleasant for people and more hospitable to some insects and to the damp conditions that go with them. The report notes the soil level at each wall so the homeowner can see where the water is held.
Correcting the grade is a contractor's job, and the technician does not promise a result. The pest work is planned around the correction: a sealing visit before the grade is changed may need to be repeated afterward, and the report says so rather than presenting the first visit as final.
- Soil above floor level at the wall base
- Damp conditions that stay after the rain stops
- Correction of the grade is a contractor's task
Why do gutters and downspouts matter for the foundation?
Gutters and downspouts decide where the roof's water lands. A downspout that discharges at the foundation sends a large volume of water to the wall base in a heavy storm, and a gutter that overflows does the same along the eaves.
A downspout that ends at the foundation is one of the most common sources of water at a wall base. The fix is a longer extension that carries the water away from the building, and the technician notes each downspout that ends too close to the house. A gutter that sags or holds debris cannot carry the roof's water, and it spills at the corners where it is least expected.
The check is simple and it is done after a storm as well as in the spring and autumn. A downspout that is blocked or that discharges at the wall is marked and reported. The fix is usually simple, and the homeowner can ask a contractor to do it.
- Check each downspout for where its water ends
- Clear gutters of debris before autumn
- Mark any gutter that sags or overflows at the corners
- Check again after a heavy storm
What does a basement or crawl space survey look for?
A basement or crawl space survey looks for damp patches, a white crust on the wall, a musty smell, and any sign of water at the base of the wall. The reading is recorded with its position so the next visit can check the same spot.
A damp patch is the first sign and the easiest to miss. The technician checks the lower wall, the corners and the floor along the wall, and notes whether the damp is recent or old. A white crust, called efflorescence, means water has moved through the masonry, and its presence is recorded as a fact about the wall rather than as a diagnosis.
A crawl space is checked with a torch from the access point, and the technician notes the condition of the soil and any standing water. Where there is no safe access, the report says so, and the crawl space is left out of the findings rather than described from memory.
- Damp patches on the lower wall and in corners
- Efflorescence as a record of past or present water
- Musty smell and its timing with the weather
- Crawl space soil and standing water, if access is safe
What should be fixed before any pest treatment?
Water sources come before pest treatment. Where the grade, the downspouts or the gutters are sending water to the foundation, the technician names the fix and recommends a contractor, and the pest plan is written around that fix.
A pest visit cannot dry a basement, and a treatment applied to a wet wall does not change the cause. The report puts the water findings at the top and says which of them need a contractor. The homeowner is not asked to act on the pest findings until the water is addressed or the timing is agreed.
This page does not give a price for drainage or grading work, and it does not name a repair company. The homeowner should get written quotes from contractors for any grade change, gutter work or drain repair, and should keep the technician's report with them.
- Name the water source in the report
- Refer the grade or drain fix to a contractor
- Plan the pest work after the water is addressed
- Keep the report with any contractor quote
