Downers Grove has one of the country's larger concentrations of Sears catalog homes. Those chimneys were built to a kit spec and they show it.
Downers Grove incorporated in 1873 along what is now the BNSF line and grew as a commuter village. It has a well-documented collection of Sears Roebuck catalog homes, among the larger concentrations anywhere, most of them built between roughly 1910 and 1940.
Those houses came as pre-cut kits shipped by rail, assembled on site to standardized plans. The chimneys followed the same catalog specifications, which means their construction is unusually consistent and their failure modes are consistent too. Once you have worked on a few, you know what is inside the next one.
Around that older core, Downers Grove has substantial postwar building and later infill, so the village covers a full range of eras. The historic stock is what requires the most care.
Each architectural period in Downers Grove has predictable chimney failure modes after enough decades of weather. Here is what to look for.
Built to standardized plans with lime-rich mortar and, in many cases, chimneys sized to the original coal or early gas heating rather than to a modern appliance. Repointing requires a Type N match per ASTM C270. Where the heating system has been changed over the decades, the flue may no longer be correctly sized for what it now vents, which is worth confirming with a camera scan.
Pre-dating the kit homes, these have the oldest masonry in Downers Grove and the most binder loss. Rebuilds need salvaged original brick, since new brick will not weather to match and the difference is visible permanently.
Exterior side-wall chimneys with softer standardized mortar, now well past the normal repointing interval. Straightforward work compared to the historic stock, with no mortar matching complication.
Downers Grove has had significant teardown and rebuild activity. Newer homes often carry multiple flues, mixing a wood-burning fireplace with gas or direct-vent appliances. Each flue is its own system and needs its own annual inspection.
On the historic side of Downers Grove this decision turns on mortar history more than age. A 1920s kit-home chimney repointed correctly can outlast one from the 1970s. Repointed with the wrong mix, it will not.
The full chimney, fireplace, and commercial 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.
Downers Grove, IL
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