Document the condition
Note location, timing, weather relationship, changes over time, and any previous work. Photos and simple measurements can improve the first conversation.
Read the local context
Exterior materials on Naperville-area homes track their construction era -- older in-town homes often carry masonry or original wood siding, while the ranch and split-level subdivisions built through the 1950s-80s commonly used early aluminum or wood siding that has since been replaced at least once. DuPage County's freeze-thaw winters and humid summers stress every exterior material differently, and the same storm systems that caused regional wind damage -- the August 2020 derecho and the March 2024 tornado that reached EF3 strength in Naperville itself -- are a reminder that impact resistance and proper flashing matter as much as appearance.
Ask what will be hidden
Sheathing condition, water-resistive barriers, window flashing, clearances, trim, and paint or finish details determine durability. The written scope should explain the preparation and verification that will no longer be visible at completion.
Compare complete scopes
Look for protection, access, materials, permits, testing, cleanup, restoration, exclusions, warranties, and change-order rules.
What official local sources add
The City of Naperville is the local permitting authority for land-disturbing activity and requires property owners to maintain on-site stormwater control facilities; Naperville has adopted DuPage County's floodplain regulations for the portions of the city within DuPage County, and Naperville's own stormwater plan relies on storm sewers, detention basins, and overflow routes. DuPage County Stormwater Management enforces the countywide Stormwater & Floodplain Ordinance across five program areas -- Watershed Management, Floodplain Mapping, Water Quality, Regulatory Services, and Flood Operations -- and the county's building code requires soil testing in areas likely to have expansive clay soils.
Sources were reviewed 2026-07-26. Confirm parcel-specific flood zones, historic-district status, permits, and current requirements with the relevant authority before authorizing work.