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After the Great Fire of 1871, Chicago rebuilt itself in brick and never stopped: by 1915 this city was producing a tenth of all the brick in America, most of it dug straight out of the Chicago River's blue clay. The result is a city of solid masonry buildings that are now 100+ years old, held together by mortar that was always designed to wear out first. This guide explains how those walls are built, what repointing (tuckpointing) really is, and how to read a brick wall like an inspector before you buy one.
A vintage Chicago wall is not brick glued to a house, it IS the house: two, three, or four layers ("wythes") of brick bonded into one thick structural mass. Hover over or tap the parts of this cutaway to see how it goes together and where it ages.
Hover over or tap each part of the wall.
Brick is permanent, mortar is a wear item, and nearly every "brick problem" in Chicago is a water problem wearing a brick costume: a parapet, sill, lintel, or joint letting moisture in. Find the water, fix the water, repoint softly, and the wall is good for another generation.
Before 1871 Chicago was a wooden city, and in two October days most of it burned. The rebuilding codes that followed pushed masonry hard, and the city happened to be sitting on its own building material: the blue-gray clay of the Chicago River, rich in lime and iron. Brickyards multiplied from 5 in Cook County at the time of the fire to 60 a decade later, and by 1915 Chicago was producing roughly one of every ten bricks in America. The local product, Chicago common brick, fired out in pinks, salmons, and buffs depending on the clay batch and where each brick sat in the kiln, with "flashed" dark patches where bricks touched. It was considered the cheap stuff, so it went on the sides, the backs, and the inner layers, while smoother out-of-state face brick got the street fronts. The last Chicago common brickyard closed in 1981, which means every common-brick wall in the city is now irreplaceable original material, and salvagers reclaim it brick by brick when buildings come down. The side of a two-flat that looks "unfinished" is the most Chicago thing about it.
Want to go deeper? The National Park Service's Preservation Brief 2 on repointing historic masonry is the standard reference, and Brick of Chicago and WTTW's history of the common brick are wonderful reads on the local material.
Rooflines, parapets, and window heads should run straight. Bulges, leans, and waves are the wall telling you where it hurts.
Diagonal step cracks mean lintels. A few windows with rust bleed is a repair list; every window on an elevation is a project.
Binoculars or a zoomed phone photo. Loose coping, open joints, and leaning tops are the most common (and most quoted) masonry work in the city.
Scratch test mentally: recessed, sandy, cracked joints mean repointing is due. Then look for previous repairs: color-matched, tooled joints are good history; gray smears over the surface are bad history.
Stains, spalls, or plant growth under windows trace to cracked or flat sills above.
Spalling in the bottom three feet usually means splashback or salt; check downspouts, grading, and where snow gets piled.
Efflorescence maps the water paths. Fresh and localized deserves a follow-up question; ancient and faint usually does not.
Painted brick is a maintenance commitment and can trap moisture; sealed-shiny brick is worse. Ask what was applied and when.
Ceiling corners and closet walls against masonry show parapet and roof-edge leaks first.
Every finding above has a going rate. Masonry work is phasable, negotiable, and never an emergency measured in days. We bring numbers into attorney review and settle it there.
We are real estate brokers. We are not masons, plumbers, electricians, structural engineers, architects, inspectors, or attorneys, and nothing on this page substitutes for any of them. These guides are our team's plain-English interpretation of Chicago's codes and of how local buildings behave, written to educate, and codes change and buildings surprise. Before money moves, put licensed professionals and the primary sources we link in front of your specific property. We are glad to recommend the pros we trust.
We tour masonry buildings every week and know which walls are wear and which are warnings. Bring us the listing, or the tuckpointing quote you are not sure about.
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