Downers Grove is one of the larger DuPage suburbs. 19th-century origins blend with extensive 20th-century growth.
Downers Grove was incorporated in 1873 and houses approximately 50,000 residents in DuPage County. The village has substantial historic housing alongside extensive postwar and recent construction.
Housing spans 1870s through 1930s Victorian and Foursquare stock, postwar 1940s through 1970s ranches, and 1990s through 2010s tear-down rebuilds and custom infill.
Each architectural period in Downers Grove has predictable chimney failure modes after enough decades of weather. Here is what to look for.
Original lime-rich mortar joints in Downers Grove's oldest chimneys have lost binder over more than a century of weather. Tuckpointing requires Type N (ASTM C270) lime-rich mortar to match. High-Portland-cement mortar will spall the historic brick within five to ten years.
Downers Grove's pre-WWII chimneys have century-old lime-rich mortar. Type N (ASTM C270) is the correct repointing match.
Center-of-roof chimneys with heavy postwar use show creosote-glazed flue tile and crown cracks. Annual NFPA 211 Level 1 inspection plus crown sealing is the right cadence for this stock in Downers Grove.
Side-of-house exterior chimneys take maximum freeze-thaw exposure. In Downers Grove mortar joints and flashing fail before the brick itself. Repointing on a 30 to 40 year cadence is normal for this stock.
Most Downers Grove chimneys can be repaired rather than replaced. The decision usually comes down to four structural questions answered on site.
The full residential service catalog, dispatched from our Park Ridge office to Downers Grove addresses.
USDA Zone 6a; inland DuPage County climate with 30 to 40 freeze-thaw cycles per winter.
Our crews dispatch the same way to these neighbors.
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